Sonnax Items


Part #     Name     Description Image Price  
S34064BA       Bushing, 400/4L80E Case (NO WALK-OUT)
Sonnax

  $10.52
S34181       FORWARD CLUTCH DRUM SEALING RI NGS OS 4L80E


  $9.94
S34204A       BATWING THRUST WASHERS 4L80E ( 1999-UP)


  $19.63
S34214       BEARING, THRUST, PLANETARY 4L8 0E (LATE 1991&UP), 4T60 & E, 4


  $12.60
S34232BK       FORWARD CLUTCH HUB WASHERS (FR ONT) GM 4L80E, THM400


  $49.80
S34235-078       Washer, 400/4L80E FWD HUG .078 OVERSIZED (SONNAX)


  $22.56
S34235-094       Washer, 400/4L80E FWD HUB .094 OVERSIZED (SONNAX)


  $22.08
S34444-1       BRACKET, CONNECTOR,4L80E WIREHARNESS


  $8.24
S34507C-6       PLUG, TCC Valve bore plug, 4L80-E
Bag of 5

  $8.78
S34507C-6A       PLUG, TCC Valve END plug, 4L80-E, SMALL
Bag of 5

  $19.11
S34507C-6B       PLUG, TCC Valve END plug, 4L80-E, .684 inch dia.
Bag of 5

  $17.62
S34507FA       Line Pressure Booster Kit, 4L80E 91-UP
Sonnax # 4L80E-LB1

  • Achieve shorter shifts and increased torque capacity without creating low-speed harshness
  • Improved band and clutch holding capacity for increased durability
  • Progressive pressure increase as driving conditions become more demanding
  • All the benefits of increased line pressure without overloading the pump at idle



  $37.68
S34507P-1       Valve, Press Regulator Line to Tube, 4L80E 91-UP
Valve, Press Regulator Line to Tube

  $81.68
S34507RAK       Boost valve, self regulating, 4L80E
Sonnax Part # 34200-10K , Alt. vender: # W-S34507HRK
REV BOOST VALVE & SLEEVE, 4L80E(W/O-RINGS)SONNAX

Click for Sonnax Information Sheet

  $87.17
S34507RBK       Reverse boost valve & sleeve kit, 4L80
Sonnax Part # 34200-03K , Alt. vender: # W-S34507ERK
OE Style boost valve & sleeve, with with balance plug, BOOST VALVE & SLEEVE, 4L80E REV 89-UP

Click for Sonnax Information Sheet

  $24.73
S34555E-2       DIRECT DRUM SLEEVE KIT 4L80E & 400


  $69.06
S34584A-1B       PINION WASHER, STEEL 4L80E (19 99 & EARLIER)


  $7.17
S34741C-1       SEAL RING, TEFLON,4L80-E FOR
Pump Parts

  $26.67
S34741CK       Valve kit, 4L80E TCC regulator
Sonnax Part # 34994-01K , Alt. vender: # W-S34741CK
Reduces converter shutter and burned converters, VALVE KIT, 4L80E TCC REG

Click for Sonnax Information Sheet

  $25.08
S34741LK       Valve kit, 4L80E Acutator Feed Limit
Sonnax Part # 34200-16K , Alt. vender: # W-S34741FK
(Requires tool T-77754-TL), LIMIT VALVE KIT, 4L80E ACTUATOR FEED(REQUIRES

Click for Sonnax Information Sheet

  $46.73
S34741MK       KIT,4L80E MANUAL VALVE UPGRADE 91-UP


  $66.01
S34741S-3       Spring, 4L80E 1-2 Shift Valve
Separator Plates

  $6.98
S34875RK       400 PLANETARY REBUILD KIT 4L80 E (1991-1998)


  $31.84
S34880RK       PLANETARY REBUILD KIT 4L80E (1999-UP)


  $40.48
S34915A-5       SERVO SPACER KIT REVERSE 4L80E 96-UP (SONNAX)


  $19.45
S34991E-4       Shift Lever Shaft ,4L80E 1991-94 (4.660" OVERALL LENGTH)
Sonnax, 1991-94 Short Version 4L80-E, All 400

  $31.30