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Transmission Parts Guide
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     Transmission Rebuild in a Box
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Makco Distributing Kit Component Guide

Deluxe Kits (Super) - Includes: overhaul kit, friction clutch plates, standard steel plates, filter, band, modulator (if required), bushing kit (or popular bushings) & sometimes popular washers.

Master Kits (w/ Steels) - Includes: overhaul kit, friction clutch plates & standard steel plates.

Banner Kits (w/o Steels) - Includes: overhaul kit & friction clutch plates.

Overhaul Kits (no Clutches) - Includes: paper gaskets, O rings, lip seals, metal clad seals and sealing rings.

New Transmission Rebuild in a Box kits
will include most parts required for a Major Transmission Rebuild.
400 Transmission Rebuild in a Box
Click here for 3L80, 400 3 speed
Transmission breakdown illustration

3L80, 400
Automatic Transmission Parts


Click here for important info on our Transmission Rebuild Kits
Transmission Rebuild in a Box Image Price    
34006A-BOX-1 Rebuild in a Box - Parts, GM 400, 1972 - up
Transmission Rebuild In a Box include most parts required for a Major Transmission Rebuild and will also including many common hard parts that should be replaced during a rebuild that many forget to order.

Detailed kit contents listed on top of the product page!
$ 300.05  
AHP46005R-K-BOX-1 Rebuild in a Box - Parts, GM 400, High Performance
1972 - up, High Performance Transmission Rebuild In a Box include most parts required for a Major Transmission Rebuild and will also including many common hard parts that should be replaced during a rebuild that many forget to order.

Detailed kit contents listed on top of the product page!
$ 386.44  
Deluxe Transmission Rebuild kits Image Price    
34008A Deluxe Kit, 400 65-UP
Includes:
overhaul kit, friction clutch plates, standard steel plates
34010A filter
N34022 band
34066,44034 bushings
44160R modulator
$ 157.3  
High Performance Transmission Rebuild kits Image Price    
AHP46005PP ALTO HP Master Kit, 400 w/ Red Eagle w/ Intermediate Powerpack
1965 - UP Master Kit includes:
Gaskets, seals and Teflon sealing ring kit.
Red Eagle friction clutch & Kolene Steels kit
10 Fwd / Direct & *4 clutch intermediate < br>ALTO Kit # 031901HPPWR AHP46005RK AND A34104PPK
$ 285.4  
AHP46005R-K ALTO HP Master Kit, 400 w/ Red Eagle Friction & Kolene Steels
1965 - UP Master Kit includes: Gaskets, seals and Teflon sealing ring kit.
Red Eagle friction clutch kit & Kolene Steels clutch kit
ALTO Kit # 031901HP
$ 241.03  
Transmission Rebuild kits Image Price    
34006AF Master kit, 400 1965-UP (FULL RING KIT),FIBER
Includes: overhaul kit, friction clutch plates & standard steel plates
  $ 101.83  
34004A Banner kit, 400 1965-UP, full set of sealing rings
Includes: overhaul kit, friction clutch plates
  $ 74.96  
34002A Overhaul kit, 400 1965-UP, Cork pan gasket
Includes full set of replacement sealing rings …Basic overhaul kit includes, paper gaskets, O rings, lip seals, metal clad seals and sealing rings. Common vender / brand TransTec
  $ 43.2  
Bands Image Price    
B34024E Band 400 / 425 / 475 / 3L80E / 4L80E Rear
New band, BorgWarner … Low / Reverse new updated design 1997-UP Will replace all 1965-up
$ 39.78  
N34022 Band 400 / 425 / 4L80E Front 1964-98
New band, value import … 1 inch wide
On 4L80E Used w/ Front Servo Piston w/ 2.530" Pin
$ 6.06  
R34022HD Band, 400 / 425 Front 64-98
HEAVY DUTY RELINED as available
$ 13.67  
R34024E Band, 400 / 425 / 4L80E Rear (Relined)
RELINED Band, Rear (Reverse) (Retros All) (65-Up)
$ 21.89  
Bushings Image Price    
34030 Bushing kit , (X) 400

  $ 31.58  
44034 Bushing GM Pump *Most popular large
350 series, 400, PG, 425, 325 300 (Not for 200 or 700 series)
  $ 2.1  
44034T Bushing, Pump Body (Teflon) 250/350/C /400/PG/AT540 (SONNAX)

$ 10.08  
34044 Bushing 400 center support .
Single groove design
  $ 6.15  
34053 Bushing 400 / 4L80E Front planet

  $ 3.81  
34062 Bushing 400 Output shaft (WIDE)
1964-74
  $ 1.67  
34062B Bushing 400 / 4L80E Output shaft (narrow)
1974-UP
  $ 2.24  
34066 Bushing 400 extension housing Large late
Most common late model 1.995 inch OD 1 1/2 inch long
  $ 2.76  
44066 Bushing, Tail Housing (Babbitt)
250 / 350 / 700R4 / 4L60E Extension housing
BW1372, NP207, NP231, NP233, NP242, NP247, NP249 Bushing, Tail Housing (27 Spline)
  $ 3.4  
44066B Bushing 250 / 350 / 700R4 / 4L60E Extension housing
Bronze dimpled 200 / 200-4R / 180 / 3L30 / 4L30E / 375 1.626 OD X 1.50 ID X .94 HT
  $ 1.62  
34037 Bushing AT540 stator front & sun gear (ft & rear)
also 4L80E overrun drum rear small
HT740 Bushing, Output Shaft
  $ 2.15  
34064 Bushing 400 case

  $ 4.21  
S34064BA Bushing, 400/4L80E Case (NO WALK-OUT)
Sonnax
  $ 10.72  
Clutch plates Image Price    
34104 Friction, 400 / 425, Intermediate clutch, .080
1965-up …… Common brand - Borg Warner
  $ 5.59  
34106 Friction, 400 / 4L80E, Forward / Direct, .080
Smooth …… Common brand - Borg Warner
  $ 4.46  
34106G Friction, 400, Forward / Direct, Radial groove
…… Common brand - Borg Warner
  $ 4.58  
A34104HD Friction, 400 / 4L80 Intermediate clutch, High Performance
Red Eagle High performance, Great for Street & Strip use …… Common brand - ALTO
  $ 7.77  
A34106HP Friction, 400 / 4L80E, Forward & Direct, High Performance
Red Eagle High performance, Great for Street & Strip use …… Common brand - ALTO
  $ 6.17  
34124 Steel, 400 / 425, Intermediate, .100 (FLAT)
1964-up …… Common brand - ALTO
  $ 4.13  
34125 Steel, 400 / 4L80E, Intermediate, .070 (WAVED)
1964-up …… Common brand - ALTO
  $ 4.43  
34127 Steel, 400, Forward / Direct, .060, (WAVED)
1967-up …… Common brand - ALTO
  $ 3.72  
34128 Steel ,400 / 425 / 4L80E, Forward, .077 (FLAT)
1964-up …… Common brand - ALTO
  $ 3.16  
34126A Steel, 400 / 425 / 4L80E, Direct, .090
1964-up …… Common brand - ALTO
AT540 FWD & 4th range - order 5 - 10 as needed
  $ 3.34  
34126B Steel, 400 / 425 / 4L80E, Forward / Direct, .060 (Commercial)
Thin, used to add extra clutches to drum …… Common brand - ALTO
  $ 8.91  
34126AK Steel, 400 / 425 / 4L80E, Forward / Direct, .090, KOLENE
Kolene coated …… Common brand - ALTO
  $ 6.08  
34127A Steel, 400, Forward / Direct, .068 (WAVED)
1964-66 …… Common brand - ALTO
  $ 3.66  
34127D Steel, 400 / 4L80E, Forward / Direct, .054 DISHED
1964-96 …… Common brand - ALTO
  $ 9.62  
34128B Steel, 400 / 425 / 4L80E, Forward, .077 (FLAT) KOLENE
1964-up, Kolene coated …… Common brand - ALTO. 34128K
  $ 7.4  
34139 Steel Module, 400
1967-up, Standard set of steel plates …… Common brand - various
  $ 35.16  
Filters Image Price    
A34010 Filter, 400 1964-E67 Tube type or Can style
1964-E67 Tube type or Can style
$ 29.27  
A34010A Filter, (X) 400 flat felt L1967-UP
Felt / Cloth filter element, Most Popular TH400 filter 1967-up
ALT PART # 33212
$ 4.76  
A34010B Filter, 400 flat brass 1967-UP
Brass / Metal filter element
$ 5.62  
D34495 Filter suction tube, 400 Deep pan type
Plastic
$ 10.12  
54016B Filter, 400 governor, 200-4R Pump solenoid Screen
Tapered filter ... Common brand - Allomatic
$ 2.21  
Gaskets & O rings Image Price    
34300 Pan Gasket: 400
OE type Cork gasket
$ 2.72  
34300F Pan Gasket: 400
Updated Fiber gasket
$ 3.87  
34305 Transmission to Adapter Gasket (TH400)
BW1370, Transmission to Adapter Gasket (TH400)
BW4470, NP205, NP205, NP208, BW1345, BW1356, BW4407
$ 0.82  
44309 Pump bolt washer, Most GM & Chrysler RWD *Order 6-10 as needed
Order 6-10 as needed / unit
  $ 1.08  
34306 Gasket, 400 / 3L80, Governor cover, 1964-UP
Also fits ALLISON AT500 / MT / B600 series
$ 1.27  
34310 Gasket, 400 front Pump
1965-98 will NOT fit 1964
$ 1.23  
34320 Gasket, 400 valve body upper, 1965-E87
6 check ball type
$ 1.07  
34320A Gasket, 400 valve body upper, L1987-1992
7 check ball type
  $ 2.43  
34321A Gasket, 400 valve body lower, 1965-92
7 check ball type gasket but will retofit back to 1965.
$ 1.69  
44311 O-Ring, Pump, 350 & 400 series

$ 1.25  
34369A O-Ring, 400 Speed-O-Housing

$ 1.24  
44371A O-Ring, GM / Ford / Chrysler Filler tube
Various years and models, Most popular O ring
$ 1.29  
44371B Boot, Filler tube, GM / Ford / Chrysler
Installs in case, Late design Filler tubes
$ 1.82  
311304 Adapter to Transfer Case Gasket
NP205, Adapter to Transfer Case Gasket
$ 0.87  
331304A Adapter to Transfer Case Gasket (M304317B)
Various, Adapter to Transfer Case Gasket (Chevy) M304317B
$ 1.31  
351304 Adapter to Transfer Case Gasket (GM)
BW1372, NP207, NP231, NP233 Adapter to Transfer Case Gasket (GM)
$ 1.16  
Sprags Image Price    
A34652 Sprag, 400 intermediate (8 Roller Type)
Spring & roller type, 1972-up
$ 15.61  
A34652A Sprag, (Z) 400 / 4L80E intermediate, (34 element CAM TYPE)
On 400's only fits the early type drums.
$ 93.53  
A34652B Sprag, 400 / 4L80E Intermediate (16 Elements - CAM type)
Fits 1965-1977 drums
$ 21  
A34654 Roller clutch, FMX / AOD / E/ 400 / 4L80E LOW
LOW / REAR sprag, Spring & roller type
Also fits 4L80E 91-E95 only
$ 13.28  
Metal Clad Seals Image Price    
44070 Seal, Front, Most GM large pump seals
400, 425, 350 series, Allum PG, 300, 325
$ 2.91  
34074 Seal, Rear, 400 / 4L80E, 1 13/16 inch ID
2.7 inch OD, LARGE, TRUCK STYLE
$ 2.91  
36074 Seal, Rear, C6 / E4OD / 400 early, 1 11/16 inch ID
2.5 inch OD, NO Boot
42RLE Seal, Rear 2wd (w/o Boot) (Exc Magnum, 300) GM 400 Early (Medium OD seal)
$ 5.52  
44074 Seal, Rear various GM and Ford
NP205, NP207, NP208, NP231, NP233, NP241, NP242, NP243, NP249
AODE Seal, Rear (Red w/o Boot) Flanged
GM375 (small output shaft 400)
$ 2.26  
44072 Seal, Linkage, Most GM except PG
400, 425, 350 series, 300, 325, 180, 4L80E, 200, 2004R, 2ML70
$ 1.25  
Modulators Image Price    
44162 Hose, Modulator hose 350 / 400 / Ford
Molded 90 degree ELBO hose
$ 1.33  
44160B Modulator: 400 / 350 BLACK / RED stripe
Large diaphragm, for low vacuum engines
$ 20.32  
44160D Modulator: 400 / 350 Dual RED stripe
Dual RED stripe
$ 17.52  
44160R Modulator: (Z) 350 / 400 Single RED stripe adjustable
Most popular GM 350, 400, 425, 300
$ 13.35  
Solenoids Image Price    
34444A Case connector, 400 1 Prong, 1968-UP
…. Common brands - various
$ 3.54  
34420 Solenoid, 400 Detent 1964-up
Kick down switch in pan, 1 wire, updated design …. Common brands - various
$ 15.61  
34444B Case connector, 400, 2 Prong w/ Variable Pitch (Large OD) 1965-67
As available!!
$ 3.03  
Thrust Washers & Bearings Image Price    
34200 Thrust washer kit, 400
Flat thrust washers
  $ 32.83  
34201A Bearing kit, 400, 3 bearings & 6 races
4L80E some models
  $ 23.15  
34211 Washer, 400, Pump .062 inch
*As available. Individual T-washers will only be shipped if available in the Dallas warehouse.
  $ 2.42  
34211A Washer, 400 pump .073 inch
*As available. Individual T-washers will only be shipped if available in the Dallas warehouse.
  $ 2.51  
34211B Washer, 400 pump .084 inch
*As available. Individual T-washers will only be shipped if available in the Dallas warehouse.
  $ 2.87  
34211C Washer, 400 pump .095 inch
*As available. Individual T-washers will only be shipped if available in the Dallas warehouse.
  $ 2.54  
34211D Washer, 400 pump .106 inch
*As available. Individual T-washers will only be shipped if available in the Dallas warehouse.
  $ 2.84  
34211E Washer, 400 pump .117 inch
*As available. Individual T-washers will only be shipped if available in the Dallas warehouse.
  $ 2.58  
34211G Washer, 400 pump .128 inch
*As available. Individual T-washers will only be shipped if available in the Dallas warehouse.
  $ 2.78  
34226 Washer, 400, Center support to Front planet
Metal washer
  $ 4.35  
34232 Washer, 400 / 4L80E, FWD drum to hub
Inside washer
  $ 3.62  
34235 Washer, 400 / 4L80E, FWD hub to Direct drum

  $ 3.91  
34268 Washer, 400 / 4L80E, Output shaft to case
4 tang, metal
  $ 7.75  
34270T Washer, 400 / 4L80E, Case saver, 3 Tang washer REPLACEMENT
3 Tang Washer Replacement
  $ 4.59  
54244A Washer, 400 / 4L80E, Front planet to rear planet, Plastic
4 tang , Also fits 200 / 2004R / 325 series, Shell to Low / rev clutch housing , .060 inch (PLASTIC)
  $ 2.08  
D34226A Washer, 400 / 4L80E, Center support to front planet *If Available
*Email for availability - Plastic type
  $ 21.81  
D34269 Washer, 400 / 4L80E, Case .076 inch
3 tang case washer
  $ 34.76  
D34269A Washer, 400 / 4L80E, Case .084 inch
3 tang case washer
  $ 34.67  
D34269B Washer, 400 / 4L80E, Case .092 inch
3 tang case washer
  $ 34.5  
D34269C Washer, 400 / 4L80E, Case .100 inch
3 tang case washer
  $ 34.67  
D34269D Washer, 400 / 4L80E, Case .108 inch
3 tang case washer
  $ 34.28  
D34269E Washer, 400 / 4L80E, Case .116 inch
3 tang case washer
  $ 26.88  
Transmission repair manuals Image Price    
34400 Transmission repair manual, 400 / 3L80
ATSG automatic transmission repair manual, Disassembly, inspection and assembly sections. Diagnosis, testing and lot of pictures
GM THM 400 Transmission found in many 1969-1985 GM domestic vehicles. Covers assembly, dis-assembly, diagnosis, and troubleshooting
$ 31.45  
34400-V Transmission repair Video with Manual, GM 400
Automatic Transmission Rebuilding Video, Drive line expert walks you through every detail of a complete rebuild. Includes freeing stuck valves, air testing clutch packs, setting end play, converter installation and much more!
Includes 90 min. DVD Video and ATSG Technical Manual
$ 69.25  
Valve body kits Image Price    
S34165 Shift correction package 400
This valve body kit deals with these problems: * Soft late shifts * Soft 2-3 shifts * Harsh reverse engagement * Clutch chatter * Bind up in manual low when hot * Heavy duty snap ring for intermediate clutch 1. The Superior 400 valve body kit offers the option of regular and heavy duty applications all in the same kit. 2. The kit supplies metal rings for the 2nd accumulator. This one is for the model years that used teflon rings. Teflon rings in this application did not perform well. 3. The Shift Correction Package comes supplied with a thicker heavy duty snap ring for the intermediate clutch. The stock ring blows past the lugs in the case which in turn leaves the case with broken lugs. With the specially engineered Superior snap ring, cases with 2 to 3 broken lugs can be used with no fear of failure. Note to purchasing: Ask for Superior part number K400
$ 50.96  
T34165 TransGo Shift Kits SK 400
TransGo # SK-400 TransGo Shift Prevents / corrects Soft Shifts, Lazy shifts, Too easy passing gear.
$ 31.99  
T34165A TransGo Shift Kits 400 reverse cushion
400RK Corrects harsh reverse
$ 42.35  
T34169 TransGo Reprogramming Kit 400 65-up Performance / heavy duty kit 400-1&2
Performance / heavy duty kit 400-1&2
Automatic shift: Competition, off road and heavy duty
$ 117.03  
T34173 TransGo Reprogramming Kit 400 65-up Performance stick shift kit 400-3
Performance stick shift kit 400-3
Stick Shift: Competition, off road and pro-street Full manual control
$ 156.43  
A44741-5 Check Ball, Valve Body (Steel) (1 ball)
Standard small GM balls, each
Order as many as needed for your application.
  $ 0.53  
T34171 TransGo Reprogramming Kit 400-PRO
Transgo 400-PRO , Pro-Race—Heavy Duty—Super Show Off.
Awesome capacity with adjustable “Classy” shifts.
Holds any gear to any RPM and backshifts with the lever to any gear at any speed. Has case protecting snap ring and Alum 2-3 Accumulator piston.
$ 146.6  
STP-20806-2 400 (65-UP) Posi Shift 2 Stage Pac (Fairbanks 20806-2 )
High Performance
Offers 2 levels of Performance: 1. Heavy Duty 2. Street & Strip
* Improves Your Automatic Transmission! * Firms up 1-2 and 2-3 shifts * Works with 6 or 7 check ball cases * Improves overall performance 1. The Posi Shift 2 Stage Pac's are by far the easiest available way to step up transmission performance. 2. Replaces worn out separator plate with the new special design plate.
$ 66.87  
STP-20812 400 (65-UP) TransAction Kit (Fairbanks 20812 )
High Performance
Offers 4 levels of Performance: 1. Heavy Duty 2. Street & Strip 3. Full Competition 4. Manual Control At Any RPM
Transforms your automatic into a true performance transmission! * Offers super positive shifts * Separator plates included * Retains passing gear * Adjustable shift points 1. This TransAction kit will work on all 6 and 7 check ball cases. 2. Stage 4 delivers full manual control or manual low at any speed which increases the overall performance level.
$ 88.69  
T-BB100A Accumulator Buddy Kit / Bore B rushes

$ 82.71  
T-BB100 Tool, Bench buddy kit
Superior Bench Buddy (Superior BB100 )
Problem Solver
Impregnated with a special super fine abrasive, Bench Buddy brushes easily remove small burrs and polish the inside of a valve bore with virtually no enlargement of the bore diameter itself. Each Bench Buddy kit features 4 different sized brushes. * Improves the surface finish of a bore by up to 50% * Restore smooth valve operation in seconds * Services bores from 1/4 to 1
$ 67.54  
WE HAVE HELP FOR
TORQUE CONVERTER SHUDDER

Instant Shudder Fixx, 
A concentrated friction modifier formulated specifically for INSTANTLY eliminating torque converter lock-up shudder
Torque converters Image Price    
M464GE Converter Bolt, GM, Metric thread
14.75 mm long / order 3 / as needed
Old # M465GEA
$ 1.39  
TC-GM2 Torque converter, 400, 3L80, 425, 475
Diameter - 13”, Pilot - 1.703”, Mount - 3 Pads, Splines - 30
Notes - Approx. Stal l1300-1500
1964-67 Variable Pitch Stator
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 95.15  
TC-GM3H Torque converter, 400, 3L80, 425, 475, 325
Diameter - 13”, Pilot - 1.703”, Mount - 3 Pads, Splines - 30
Notes - Approx. Stall1700-19002
Row of Ribs (High Stall) - Fixed Pitch Stator
When used on a 325 FWD - High Stall (1750- 2000)
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 98.22  
TC-GM3-HD Torque converter, 400, 3L80, 425, 475
Diameter - 13”, Pilot - 1.703”, Mount - 3 Pads, Splines - 30
Notes - Approx. Stall1300-1500 w/ Flanged Hub & HD Bearing,
DO NOT USE W/ ALLISONS
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 262.5  
TC-GM3R-HD Torque converter, 400, 3L80, 425, 475
Diameter - 13”, Pilot - 1.703”, Mount - 3 Pads, Splines - 30
Notes - Approx. Stall1300-1500HD - GM3 w/ Regular Hub & HD Bearing.
DO NOT USE W/ ALLISONS
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 262.5  
TC-GM6 Torque converter, 400, 3L80, 425, 475
Diameter - 13”, Pilot - 1.703”, Mount - 6 Pads, Splines - 30
Notes - Approx. Stall1300-1500
3 Row of Ribs. Fixed Pitch Stator
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 89.46  
TC-GM6H Torque converter, 400, 3L80, 425, 475
Diameter - 13”, Pilot - 1.703”, Mount - 6 Pads, Splines - 30
Notes - Approx. Stall 1700-1900
2 or 3 Row of Ribs (High Stall) Fixed Pitch Stator
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 262.5  
TC-GM6-HD Torque converter, 400, 3L80, 425, 475
Diameter - 13”, Pilot - 1.703”, Mount - 6 Pads, Splines - 30
Notes - Approx. Stall 1300-1500
w/ Flanged Hub & HD Bearing .
DO NOT USE W/ ALLISONS
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 153.45  
TC-GM6R-HD Torque converter, 400, 3L80, 425, 475
Diameter - 13”, Pilot - 1.703”, Mount - 6 Pads, Splines - 30
Notes - Approx. Stall1300-1500HD ,w/ Regular Hub & HD Bearing .
DO NOT USE W/ ALLISONS
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 110.75  
TC-JA4 Torque converter, 400, 3L80, 425, 475
Diameter - 13”, Pilot - 1.703”, Mount - 6 Pads, Splines - 30
Notes - Approx. Stall1700-1900
2 or 3 Row of Ribs (High Stall) Fixed Pitch Stator (Jaguar 12 Cyl)
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
  $ 262.5  
TC-JA7 Torque converter, 400, 3L80, 425, 475
Diameter - 13”, Pilot - 1.703”, Mount - 3 Pads, Splines - 30
Notes - Approx. Stall 1500-1700
2 or 3 Row of Ribs (Jaguar) - Fixed Pitch Stator
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 262.5  
TC-GM3 Torque converter, 400, 3L80, 425, 475, 325, 350
Diameter - 13”, Pilot - 1.703”, Mount - 3 Pads, Splines - 30
Notes - Approx. Stall 1300-1500
3 Row of Ribs - Fixed Pitch Stator
ALT. PART # B3M
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 81.99  
Performance converters Image Price    
TC-A3HD Torque converter, 400, 3L80, 425, 475 & Allison AT540
Diameter - 13”, Pilot - 1.703”, Mount - 6 Pads, Splines - 30
Notes - Approx. Stall 1300- 1500, ALLISON (Gas & Diesel) Codes: 270, 275 (Can Use w/ TH400)
Codes: 270, 275 (Flanged Hub) Do Not Use for Codes 290 or 275LU
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 215.36  
TC-A6HD Torque converter, 400, 3L80, 425, 475 & Allison AT540
Diameter - 13”, Pilot - 1.703”, Mount - 6 Pads, Splines - 30
Notes - Approx. Stall 1200-1400, ALLISON (Diesel Only) Codes: 290 (Can Use w/ TH400)
Codes: 290 (Flanged Hub)(D)HD-545. Do NOT Use for Codes 270, 275 or 275LU!
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 300.78  
TC-PP3412EXLS Performance Converter, 350 & 400, 2300-2800 stall
Size: 11, Bolt Pattern: 350-400 small , Engine: All Brazed Impeller: Y , Brazed Turbine: Y , Bearings: 3 , Washers: 0
  $ 258.35  
TC-PP3423 Performance Converter, 350 & 400, 1900-2200 stall
Size: 11, Bolt Pattern: 350-400 small, Engine: All, Bearings: 1
  $ 238.93  
TC-PP3412MS Performance Converter, 350 & 400, 3200-3700 stall
Size: 11, Bolt Pattern: 350-400 small , Engine: All Brazed Impeller: Y , Brazed Turbine: Y , Bearings: 3 , Washers: 0
  $ 297.2  
TC-PP3412LS Performance Converter, 350 & 400, 2800-3200 stall
Size: 11, Bolt Pattern: 350-400 small , Engine: All Brazed Impeller: Y , Brazed Turbine: Y , Bearings: 3 , Washers: 0
  $ 277.78  
Hard parts Image Price    
A34680 Governor, 400 Gas
2nd design . New governor ….
$ 62.41  
A34684 Gear, 400 governor gear, 1965-UP
Gear, roll pin & 2 nails …. Common brands - Sonnax
$ 2.67  
D34476 Silencer Ring, 400, .177 inch thick,
*Use for all applications since the .170" has been discontinued.
$ 10.12  
D34495 Filter suction tube, 400 Deep pan type
Plastic
$ 10.12  
D34594S Ring Gear, Rear 400 / 4L80E (Straight Teeth)
1991-96 4L80E & some 400.. NEW Delco.
  $ 262.92  
34476 Silencer Ring, 400, .177 inch thick,
Replaces discontinued .170 inch thick style
$ 7.86  

Pumps do not include seals, gaskets or o'ring

Pumps Image Price    
A44530A Pump gears, 350 / 400, .721 inch thick

$ 11.06  
A44530AA Pump gears, 350 / 400, .723 inch thick

$ 11.08  
A44530AB Pump gears, 350 / 400, .725 inch thick

$ 11.06  
A44530AC Pump gears, 350 / 400 / 325, .727 inch thick

$ 11.08  
S34507PK Pressure regulator Valve kit, 400 , sealing ring type
Sonnax Part # 34910-03K , Alt. vender: # W-S34507PK
ELIMINATES REPLACING THE PUMP CASTING TO INSURE PRESSURE CONTROL, PRESS REG ASSY, 400 64-UP
Click for Sonnax Information Sheet
$ 33.32  
S34507RK Reverse Boost Valve Kit , 400 O-ring style
Reverse Boost Valve Kit (Includes O-Rings) (Sonnax)
$ 34.99  
S34507RCK Reverse Boost Valve Kit 400 65-UP OE Style
Reverse Boost Valve Kit (Factory Style) (Sonnax)
$ 35.06  
R34500 Pump, 6 Bolt (Body Cast # 895, Stator Cast # 896) (71-98)
Pump, 6 Bolt (Body Cast # 895, Stator Cast # 896)
May require Core Charge, We will contact you if required.
$ 68.22  
R34500A Pump, 8 Bolt (Body Cast # 895, Stator Cast # 896) (65-98)
Pump, 8 Bolt (Body Cast # 895, Stator Cast # 896)
May require Core Charge, We will contact you if required.
$ 81.51  
T-172 Tool, Pump Alignment Universal
REPLACES: T2862 / T2162 / T1062 / T1762 / T1097 / T2962
Fits all past, present & future applications
Utilize a wider band for better tool to pump alignment
Better pump alignment due to the constant, even pressure
Very easy to use
Less expensive than buying individual sizes Pump Alignment Chart Guide
$ 150.16  
Servos & Accumulators Image Price    
A34927 Accumulator Piston, 400 ,
Aluminum w/ 3 Legs, in VB
$ 4.25  
A34946 Spring, 400 / 4L80E Rear Servo (BLUE)

  $ 2.85  
D34906 Spring, Front Servo 400/4L80E

  $ 8.91  
Drums Image Price    
D34964E Piston, 400 / 4L80E FWD clutch 1991-95
(O.E. #8675508)
  $ 67.76  
D34965E Piston, 400 / 4L80E Direct clutch (6 clutch LATE)
ALUMINUM, with out check ball, (DISH SPRING TYPE) (O.E. #8675511) .623 inch tall / Uses retainer with springs (CAST#8675510)
$ 34.32  
U34555 400 Early direct drum 65-70, Smooth cam type !!
Good Used --Sprag Type direct drum. Use with # A34652A, 34 element sprag
*Drum only!!! No Race or sprag included....
$ 112.83  
U34555A Drum, 400 Direct drum, Lug type cam, 1972-up
Good Used --LUG Type direct drum. Use with 8 roller type sprag. *Drum only!!!
No Race or sprag included....
  $ 43.79  
Miscellaneous Items Image Price    
A44839 Transmission MAGNET, Square
Magnet fits in most pans
Traps fine metal shavings
Approx 1" L x 3/4" W
$ 2.34  
T44494U Fill Tube & Dip stick, GM
Fits GM 200, 200C, 200-4R, 350, 350C and 400, Teckpak
ALT. PART # K35999U
$ 25.02  
2000 Mount, GM RWD Universal transmission
Replaces most single stud or two hole mounts from 1955 to 1996.
3 bolt holes on mount. Use bolt in center hole to replace center stud mount.
Use 2 out side bolt holes to replace 2 bolt type mounts.
Wide notched base with elongated bolt holes will fit the narrow 350, 200, 700R4 and wide base 400 transmissions.
Will Not replace Offset type mounts
$ 4.75  
M463D GM Universal RWD dust cover
Fits 90% of GM RWD automatic transmissions from 1965-1995
Alt. part # K35803U
$ 14.96  
M463SA Ground strap, 14 inch long
Missing or bad ground straps can cause many problems.
A must check item on every rebuild.
$ 3.62  
M463SB Ground strap, 42 inch long
Missing or bad ground straps can cause many problems. A must check item on every rebuild
$ 7.51  
A44839B Transmission MAGNET, round
Round, thick (.250" +-) Magnet fits in most pans to trap fine metal shavings
$ 2.21  
M465SC Trans Prep green Transmission Assembly Lube

YOU NEED THIS ON EVERY REBUILD


Specifically designed for automatic or manual transmission assembly. Lubricates o-rings, gaskets, bearings, bushings, sealing rings, thrust washers & seals during assembly. It’s unique blue color prevents misdiagnosing leaks. Trans Prep will not melt at shop temperatures up to 135Ί & is formulated to dissolve quickly at operating temperatures, therefore not clogging filters. Trans Prep is compatible with all transmission fluids.
  • Designed to maintain tackiness in warmer environments
  • Holds parts in place and provides lubrication during start up
  • Compatible with all ATFs
  • Dissolves quickly at operating temperatures
  • GREEN formula eliminates misdiagnosing leaks
  • Smart Blend #5250 16oz.
    ***IF NEEDING A DIFFERENT COLOR LUBE, CONTACT US FOR ASSISTANCE!!***
  • $ 11.48  
    LA-2001K 18 oz. Cooler line cleaner with 5/16 and 3/8 adapter

    Always flush the cooling system


    Contaminated fluid will stay in the cooling system, this will flush out the system and prevent re-contamination to the transmission!


    Life Automotive Products INVENTED, DESIGNED & PATENTED the first aerosol Transmission Cooler Flush product in 1993 utilizing an OEM approved, biodegradable cleaning agent. Trans Flush’s unique design and patented technology have made it the #1 selling cooler and line flusher worldwide. It safely flushes out harmful contaminants (metal shavings and sludge) from the transmission cooler and lines preventing the contaminants from entering a newly installed transmission. Accept No Imitations
  • Prevents Contamination (metal shavings & sludge etc.)
  • Prevents Costly Comebacks
  • Patented High Pressure Cleaner
  • #1 Choice of Professional Mechanics Worldwide
  • OEM & Large Rebuilder Approved Supplier
  • Proven and Used in Millions of Vehicles
    Contains:M465F18 & M465FB

    Click here for a TRANS FLUSH" Cooler line return chart.
  • $ 24.68  
    Tools Image Price    
    T-0015 Tool, LIP Seal installer
    Universal Transmission - Lip Seal Installer. Helps to roll most lip seals in without damage.
    $ 40.29  
    T-1079 Tool, Double pointed scribe, 9 1/4 long
    Heat treated high carbon steel picks. Removes O rings, gaskets, springs and great for removing snap rings.
    Straight and 90 degree angle points.
    $ 18.84  
    T-0280-C Tool, Bushing cutting chisel ***NOW AVAILABLE!!***
    Cuts using the Curl Cut method. Also known as a Tailpipe cutter.
    ***NOW IN-STOCK! CALL TODAY TO GET YOURS!***
    $ 39.81  
    T-1055 Tool, GM oil pump remover and End play tool
    By ATEC
    $ 143.67  
    T-172 Tool, Pump Alignment Universal
    REPLACES: T2862 / T2162 / T1062 / T1762 / T1097 / T2962
    Fits all past, present & future applications
    Utilize a wider band for better tool to pump alignment
    Better pump alignment due to the constant, even pressure
    Very easy to use
    Less expensive than buying individual sizes Pump Alignment Chart Guide
    $ 150.16  
    Sonnax Items Image Price    
    S34064BA Bushing, 400/4L80E Case (NO WALK-OUT)
    Sonnax
      $ 10.72  
    S34235-078 Washer, 400/4L80E FWD HUG .078 OVERSIZED (SONNAX)

      $ 21.83  
    S34235-094 Washer, 400/4L80E FWD HUB .094 OVERSIZED (SONNAX)

      $ 21.87  
    S34507PK Pressure regulator Valve kit, 400 , sealing ring type
    Sonnax Part # 34910-03K , Alt. vender: # W-S34507PK
    ELIMINATES REPLACING THE PUMP CASTING TO INSURE PRESSURE CONTROL, PRESS REG ASSY, 400 64-UP
    Click for Sonnax Information Sheet
    $ 33.32  
    S34507PK-1 Sealing rings, TEFLON, for S34507PK
    Sonnax Part # 34910-S-25 , Alt. vender: # W-S34507P-RK
    Bag of 25, RING SET, 400 PRESSURE REG VALVE(TEFLON)
      $ 21.96  
    Switch Kit Image Price    
    7-40C 700-R4 to 400 4 wheel drive Switch kit 1985-up
    700-R4 to 400 4 wheel drive Switch kit 1985-up
    V8 only, Blazer & full size pickups

    Includes: Transfer case adapter, transfer case gasket, output shaft, dust cover, filler tube & stick, passing gear switch, speedometer hole plug, selector i
    $ 581.93  
    7-40B 700-R4 to 400 2 WD Switch kit 1982-up
    700-R4 to 400 2 WD Switch kit 1982-up
    Blazer & Pickups V8 & 4.3L V6 engines

    Includes: adapter block, output shaft, extension housing, dust cover, filler tube & stick, passing gear switch, transmission mount, selector indicators,
    $ 533.59  
    7-40A 700-R4 to 400 4 wheel drive Switch kit 1982-84
    700-R4 to 400 4 wheel drive Switch kit 1982-84
    V8 only

    Includes: Transfer case adapter, transfer case gasket, output shaft, dust cover, filler tube & stick, passing gear switch, speedometer hole plug, selector indicators, required bolts,
    $ 639.18  
    Remanufactured Valve Bodies Image Price    
    P34740-4 Valve body 400, 87-Up , w/o reverse check ball
    Remanufactured valve body: w/o pressure switches
    Reference # P34990
    Please note that core deposit maybe required before shipping.
    P34740-4 is for vehicles over 10,000 GVW.
    P34740-5 is for vehicles under 10,000 GVW.
    $ 0  
    P34740-5 Valve body 400, 87-Up , w/reverse check ball
    Remanufactured valve body: w/o pressure switches
    Reference # P34990B
    Please note that core deposit maybe required before shipping.
    P34740-4 is for vehicles over 10,000 GVW.
    P34740-5 is for vehicles under 10,000 GVW.
    $ 0  
    T-BB100A Accumulator Buddy Kit / Bore B rushes

    $ 82.71  
    T-BB100 Tool, Bench buddy kit
    Superior Bench Buddy (Superior BB100 )
    Problem Solver
    Impregnated with a special super fine abrasive, Bench Buddy brushes easily remove small burrs and polish the inside of a valve bore with virtually no enlargement of the bore diameter itself. Each Bench Buddy kit features 4 different sized brushes. * Improves the surface finish of a bore by up to 50% * Restore smooth valve operation in seconds * Services bores from 1/4 to 1
    $ 67.54  

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    Makco Transmission Parts - 4336 Helton Dr, Florence, AL 35630
    Phone 256-767-2840 - Fax 256-767-2841