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Allison 1000 / 2000 / 2400 series
Transmission breakdown illustration

2000 to 2005 id different than the 2006 and Up Gen4 design

1000
Automatic Transmission Parts


Click here for important info on our Transmission Rebuild Kits
Transmission Rebuild kits Image Price    
121006A Master kit, ALLISON 1000 / 2000 /2400 , 2001-2005
Includes: overhaul kit, friction clutch plates & standard steel plates
Also includes BONDED pistons!
  $ 773.73  
AHP121006APP ALLISON 1000 HEAVY DUTY MASTER REBUILD KIT W/ PISTONS (99-05)
MASTER KIT INCLUDES: 121002A (w/ Pistons), A121108HPK(C1), A121100HPK(C2), A121106HPK(C3), A121104HPK(C4), A121114HPK(C5).
*NOTE THAT THESE CLUTCHES ARE POWERPACKS!*
Red Eagle Powerpacks have larger clutch apply area over stock!
$ 1086.75  
121004A Banner kit, ALLISON 1000 / 2000 /2400 , 2001-2005
Includes: overhaul kit, friction clutch plates
Includes BONDED pistons
  $ 577.23  
121002A Overhaul kit, ALLISON 1000 / 2000 / 2400, 2001-2005
Basic overhaul kit includes, paper gaskets, O rings, lip seals, metal clad seals and sealing rings.
Includes Bonded pistons
  $ 528.3  
121006B Master kit, ALLISON (Gen4) 1000 / 2000 /2400 2006-UP
(Gen4) Includes: overhaul kit, friction clutch plates & standard steel plates
Also includes BONDED pistons!
  $ 774.84  
121004B Banner kit, ALLISON (Gen4) 1000 / 2000 /2400 2006-up
(Gen4) Includes: overhaul kit, friction clutch plates
Includes BONDED pistons
  $ 589.95  
121002B Overhaul kit, ALLISON (Gen4) 1000 / 2000 / 2400, 2006-UP
(Gen4) Basic overhaul kit includes, paper gaskets, O rings, lip seals, metal clad seals and sealing rings.
Includes bonded pistons
  $ 541.41  
Bushings Image Price    
121034 Bushing ALLISON LT1000 / 2000 pump body
Bushing, Front Pump Body (2nd Design)
  $ 12.59  
121030 Bushing Kit LT 1000 / 2000

  $ 48.89  
Filters Image Price    
121010 Filter, Allison 1000 / 2000 Shallow pan
2000-early 2006 1st design, Shallow pan filter
Pan depth is the same front to rear. ...
$ 14.49  
121010A Filter, Allison 1000 / 2000 Deep pan filter
2000-2009 1st design, Deep Pan
Pan depth TAPERS off from the FRONT to REAR. ...
$ 16.45  
121010B Filter, Shallow Pan , LT1000/2000/2400 2010-UP
Filter, Shallow Pan (2nd Design)
$ 59.31  
121010C Filter, Deep Pan , LT1000/2000/2400 2010-UP
Filter, Deep Pan (2nd Design)
$ 49.98  
121013 Filter, 1000 / 2000 SPIN-ON 2000-UP
Allison transmission - External Spin on filter
Private label brand - manufactured by Linesoon mfg.
$ 6.9  
121839 Filter - Magnet, External Spin On Filter LT1000 00-UP

  $ 7.72  
Gaskets & O rings Image Price    
121300 Pan Gasket: ALLISON 1000 / 2000 2000-UP
Molded rubber
$ 52.05  
121305 Extension Housing Gasket

  $ 15.96  
121318 Gasket, Bell Housing Plate, ALLISON 1000 FRONT 01-UP
can use 121318B
  $ 15.09  
121318A Gasket, Bell Housing Plate (Rear), ALLISON 1000

  $ 13.46  
121318B Gasket, Bell Housing Plate (Front) ALLISON 1000
2nd Design, Retros 2000-Up
  $ 13.17  
121323 Gasket, Cooler Manifold, LT 1000

  $ 11.64  
121311 O-Ring, Pump, ALLISON 1000 01-UP

  $ 7.54  
Transmission repair manuals Image Price    
121400 Transmission repair manual, ALLISON 1000 / 2000 2000-03
ATSG automatic transmission repair manual, Disassembly, inspection and assembly sections. Diagnosis, testing and lot of pictures
Allison (Generations I-II) 1000/2000 Transmission found in 2000 and up C and K Series trucks. Covers assembly, dis-assembly, diagnosis, troubleshooting, and electronic controls & operation
$ 31.13  
Solenoids Image Price    
D121418A Solenoid, Allison TRIM "B" 2000-05
Allison 1000/ 2000/2400
$ 142.91  
D121418 Solenoid, Allison TRIM "A" 2000-05
ALLISON 1000/ 2000/2400
$ 150.85  
D121425 SOLENOID TCC PCS LT1000 06-UP
Solenoid, "PCS" (TCC) (Gen4)
  $ 88.35  
D121418C SOLENOID PCS2 LT1000 06-UP
Solenoid, "PCS2" (Gen4)
  $ 62.36  
D121418B SOLENOID PCS1 LT1000 06-UP
Solenoid, "PCS1" (Gen4)
  $ 60.8  
74418EA Solenoid Shift, Allison "C", "D", "E" (1 solenoid)
Allison 1000/ 2000/2400 2001 - Up
Order 1 to 3 as needed for "C", "D", "E"
ALSO for L03-Up Modulated Pressure Control "G" L03-Up
Various brands as available! (D74418EA - 74418EA)
$ 16.05  
74418E Solenoid, 4L60E TCC 1994-UP, 4L60E PWM & 3-2 Down shift 1993-95
4T40 / 45E TCC 1995-UP
4T80E Lock-Up (TCC) 1993-UP
4T65E Lock-up (TCC) 1997 +
Allison 1000 "F" LU / Trim
5L40 5L50 series TCC

Rostra part # - 52-0240
$ 17.91  
Switches & Electrical Image Price    
121410 Switch, 1000/2000 Allison Switch, Neutral Start/Backup (MLPS) 2 Connector
MPLS/PRNDL(2 Connector)2001- E2003(External) Switch, Neutral Start/Backup (MLPS) 2 Connector
(Tan/White Plastic, Retro-Fits The Black Plastic # D74410A)
$ 169.07  
D121410A Switch, Neutral Start/Backup (MLPS) 1 Connector LT1000/2000 L03-05
Switch, Neutral Start/Backup (MLPS) 1 Connector
$ 129.41  
D121410B Switch, Internal Mode Switch (MLPS) LT1000 06-UP
Switch, Internal Mode Switch (MLPS) 1 Connector (Gen4)
  $ 126.46  
121438 Speed sensor, Allison, Input, Output & Turbine (1 sensor)
Order 1 to 3 as needed for Input speed sensor, Output speed sensor, & Turbine speed sensor
Allison 1000 / 2000 / 2400 series
$ 15.13  
D121446 Internal wiring harness, 6 solenoid type only
2001 to early 2003, Allison 1000 / 2000 / 2400 series
  $ 120.98  
D121446A Internal wiring harness, "7 solenoid type only"
Late 2003-2005, Allison 1000 / 2000 / 2400 series
  $ 120.12  
D121446B Wiring Harness Intrernal LT1000 2006-UP
Wiring Harness Assembly (Internal Mode) (Gen4 except GM)
  $ 148.33  
D121446C Wiring Harness Internal, LT1000 2006-UP
Wiring Harness Assembly (Internal Mode) (Gen4 GM Applications)
  $ 300.08  
D121411A Switch Assembly, Pressure Manifold (4 Switch) LT1000 2000-UP
(WILL REPLACE 6 SWITCH)2000-up
  $ 87.78  
14411A Switch, 4T40 / 4T45E pressure manifold switch
2000-2005 Allison 1000 Switch Assembly, Pressure Manifold (6 Switch)
W-D14442A
$ 61.17  
A74445U Wiring Harness (External Repair) GM
Wiring Harness (External Repair) Universal 20 Pin
W-84445GH
  $ 68.58  
74446K Repair kit, 4L60E PARK / NEUTRAL Switch harness 1995-UP
Connects to PRNDL switch, 1995-2008 also order # D74410A
Also Allison 1000 / 2000 2000-2005
  $ 61.28  
Valve Body Kit Image Price    
T121165 Shift Kit, Allison 1000-2000
Duramax Diesel 2001-2004, Heavy Duty, Street & Competition for Diesel/Gas Trucks.
Short, Crisp & Smooth upshifts and kickdowns.
Handles 600 Street Horsepower. Install during rebuild only!
Corrects/Prevents/Reduces: Goes to neutral under load
3-4 slip, burned C2 or C3 clutches, sticks in one gear
Won’t move after extended parking,loss of pump prime & smart clutch control valves for increased durability.
$ 340.58  
T121167 Shift Kit, Allison-Jr
2005 - 2006 Allison 6 spd 1000 Series
TransGo info: Install from bottom. Increases torque capacity
Corrects/Prevents/Reduces: Goes to neutral under load; 3-4 slip; burned C3 clutches; sticks in one gear; smart clutch control valves for increased durability; SHORT-CRISP-SMOOTH-upshifts and kickdowns.
$ 113.56  
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  
Clutch plates Image Price    
121100 Friction, ALLISON 1000, C2, 01-UP
…… Common brands - ALTO & Allomatic
  $ 6.21  
121104 Friction, ALLISON 1000, C3 / C4, 01-UP
…… Common brands - ALTO & Allomatic
  $ 9.17  
121108 Friction, ALLISON 1000, C1, 01-UP
…… Common brands - ALTO & Allomatic
  $ 4.25  
121114 Friction, ALLISON 1000, C5, 01-UP
…… Common brands - ALTO & Allomatic
  $ 6.92  
121120 Steel, ALLISON 1000, C2, 01-UP
…… Common brand - ALTO
  $ 6.83  
121124 Steel, ALLISON 1000, C3 / C4, 01-UP
…… Common brand - ALTO
  $ 11.4  
121128 Steel, ALLISON 1000, C1, 01-UP
…… Common brand - ALTO
  $ 5  
121134 Steel, ALLISON 1000, C5, 01-UP, .098
…… Common brand - ALTO
  $ 10.43  
121124A Steel, ALLISON 1000, C3 / C4, Apply plate, 01-UP (.125)
…… Common brand - ALTO
  $ 13.85  
121134A Steel, ALLISON 1000, C5, 01-UP, Selective, .079
…… Common brand - ALTO
  $ 14.44  
121134B Steel, ALLISON 1000, C5, 01-UP Selective, .118
…… Common brand - ALTO
  $ 19.25  
A121100HPK Power Pack, C2 , LCT1000 2000-UP
Friction, Power Pack, C2 Clutch (High Performance)
  $ 197.32  
A121104HPK Power Pack, C4 Clutch , LCT1000
Friction, Power Pack, C4 Clutch (High Performance)
  $ 169.11  
A121106HPK Power Pack, C3 Clutch , LCT1000
Friction, Power Pack, C3 Clutch (High Performance)
  $ 140.46  
Drums & Pistons Image Price    
D121554 DRUM, LT1000, C1/C2, 2000-05 W/PTO gear
Rotating Drum (C1-C2) (w/ PTO Gear)
  $ 1331.89  
121960B Piston (Bonded), LCT1000 C2 BAL 01-05 (ELIMINATED 06-UP)
C2 Balance Piston (Bonded) NOT USED in GEN 4
  $ 42.5  
121962 Piston (Bonded), LCT1000 C3/C4 01-UP
C4 Clutch Piston (Bonded)
$ 58.78  
121964B Piston (Bonded), LCT1000 C1 BAL 2001-05
C1 Balance Piston (Bonded)
  $ 30.75  
121964BA Piston (Bonded), LCT1000 C1 BAL 2006-UP
C1 Balance Piston (Bonded) Gen4 2006-up
  $ 43.75  
Hard Parts Image Price    
D121770 Extension Housing, LT1000/2000/2400, 4wd

  $ 812.49  
U121678A Shaft, LT1000/2000/2400, Output 4wd

  $ 206.26  
D121510K Pump Body Kit , LT1/2000/2400 REPAIR COMPONENTS
Pump Body Kit (Includes Body, Gears, & Plate) (22T Design)
  $ 410.72  
Remanufactured Valve Bodies Image Price    
P121740-1 Valve body LCT1000 , 00-03 , w/o modulated control
Remanufactured valve body: w/new trim A&B solenoid/PSM, w/updated TCC control sleeve
Reference # P15990
Please note that core deposit maybe required before shipping.
$ 909.96  
P121740-2 Valve body LCT1000 , 04-05 , w/modulated control (5-Speed)
Remanufactured valve body: w/new trim A&B solenoid/PSM, w/updated TCC control sleeve
Reference # P121740-2
Please note that core deposit maybe required before shipping.
$ 907.79  
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    
TC-A7X Torque converter, Allison 1000, 2000, 2400
Diameter - 13.5” Single Friction Clutch, Pilot - 1.703”, Mount - 6 Drilled Holes, Splines - 25
Notes - Replaces A7, Medium Stal - Green or Yellow Sticker, Built w/ Flanged Hub & Billet Cover, 1.75 Ratio,
Codes: 221, 29538529, 29538348,29530318, 29543003

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.
$ 372.75  
TC-A7XH Torque converter, Allison 1000, 2000, 2400
Diameter - 13.5” Single Friction Clutch, Pilot - 1.703”, Mount - 6 Drilled Holes, Splines - 25
Notes - Replaces A7 High Stall, lHigh Stall - Blue or Orange Sticker Built w/ Flanged Hub & Billet Cover, 2.06 Ratio,
Codes: 210, 29538531, 29538197

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.
$ 556.33  
TC-A7XL Torque converter, Allison 1000, 2000, 2400
Diameter - 13.5” Single Friction Clutch, Pilot - 1.703”, Mount - 6 Drilled Holes, Splines - 25
Notes - Replaces A7 Low Stall, Low Stall - Black Sticker, Built w/ Flanged Hub & Billet Cover, 1.63 Ratio,
Codes: 222, 29530317, 29538347,29538528, 29540484, 29543017
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.
$ 556.33  
Miscellaneous Items Image Price    
50464001 Nut 1000/2000 Allison Output Shaft (4x4) (With 4 Notches On The Outside
29531231
  $ 47.76  
121496 CLIP COOLER LINE LT1000 00-UP

  $ 1.68  
A44839 Transmission MAGNET, Square
Magnet fits in most pans
Traps fine metal shavings
Approx 1" L x 3/4" W
$ 2.34  
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  
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  

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    New Mail & Ship to Address: Makco Transmission Parts - 755 Grand Blvd, Ste. B105-261 Miramar Beach, FL 32550
    Phone 1-877-916-2526    Fax 1-844-272-9944