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GM

4L80-E Transmission

Related Units Tech Resources View all Transmissions

Browse all 4L80-E transmission parts here or use the filters below to find just what you are looking for.

 

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Remanufactured Valve Body
Heavy Duty Remanufactured Valve Body

4L80-E, 4L85-E Heavy Duty Remanufactured Valve Body GM030

Fits '04-later units. Smart-Tech® overrun clutch valve kit installed.

Heavy Duty Remanufactured Valve Body

4L80-E, 4L85-E Heavy Duty Remanufactured Valve Body GM033

Fits '97–'03 units. Smart-Tech® overrun clutch valve kit installed.

Remanufactured Valve Body

4L80-E, 4L85-E Remanufactured Valve Body GM029

’04-Later

Remanufactured Valve Body

4L80-E, 4L85-E Remanufactured Valve Body GM028

’97–’03

Remanufactured Valve Body

4L80-E, 4L85-E Remanufactured Valve Body GM027

’92–’96, Temperature Sensor in Wire Harness

Internal
Bearing Kit

Bearing Kit SBK-G20

    Helps cure:
  • Bearing noise
  • Bearing failure
Direct Drum Sleeve Kit

Direct Drum Sleeve Kit 34838-01K

In 4L80-E units, part can be used in either early or late-model drums.

    Helps cure:
  • Direct clutch failure
  • Delayed 3rd
  • Delayed Reverse
  • Code 87, 730, 756, 1811
  • No 3rd
  • No Reverse
  • Maximum line presssure
  • No 4th
  • 2nd Gear starts w/MIL on
  • TCC slip codes
Extreme Duty Forward Clutch Hub Kit

Extreme Duty Forward Clutch Hub Kit 34322-02K

Extreme Duty Input Shaft

Extreme Duty Input Shaft 34670-02

  • Shaft Material: Aermet
Extreme Duty Main Shaft

Extreme Duty Main Shaft 34672-05

  • Material: Aermet
Forward & Direct Clutch Inner Snap Ring

Forward & Direct Clutch Inner Snap Ring 34577-01

    Helps cure:
  • Lost or damaged component
Forward Clutch Hub Front Washer

Forward Clutch Hub Front Washer 34298-078

Forward Hub

  • Material: Steel
  • Thickness: 0.078"
  • Outer Dia.: 1.781"
  • Inner Dia.: 1.289"
    Helps cure:
  • Excess front endplay
Forward Clutch Hub Washer (Rear)

Forward Clutch Hub Washer (Rear) 34301-078

Forward Clutch Drum

  • Material: Steel
  • Thickness: 0.078"
  • Outer Dia.: 1.780"
  • Inner Dia.: 1.405"
    Helps cure:
  • Excess front endplay
  • Forward clutch & sealing ring failure
  • Reduced bearing, thrust washer & sealing ring life
Forward Clutch Hub Washer (Rear)

Forward Clutch Hub Washer (Rear) 34301-094

Forward Clutch Drum

  • Material: Steel
  • Thickness: 0.094"
  • Outer Dia.: 1.780"
  • Inner Dia.: 1.405"
    Helps cure:
  • Excess front endplay
  • Forward clutch & sealing ring failure
  • Reduced bearing, thrust washer & sealing ring life
Front/Rear Unit Endplay Shim

Front/Rear Unit Endplay Shim 34500-Z

Updated 3-tang style shim fits all units, including '97-later 4L80-E and 4L85-E units.

  • Material: Steel
  • Tang Count: 3
  • Inner Dia.: 1.165"
  • Thickness: 0.010"
  • Outer Dia.: 1.940"
    Helps cure:
  • Excess front endplay
  • Excess rear endplay
  • Burnt Forward clutch
  • Premature seal ring failure
Heavy Duty Clutch Retaining Ring

Heavy Duty Clutch Retaining Ring 28124

Intermediate clutch backing plate Upgrade for Intermediate clutch retaining ring.

Heavy Duty Forward Clutch Hub

Heavy Duty Forward Clutch Hub 34322-01

Heavy Duty Input Shaft

Heavy Duty Input Shaft 34670-01

  • Material: 300M
Heavy Duty Main Shaft

Heavy Duty Main Shaft 34672-01

  • Material: 300M
Oversized Seal Rings

Oversized Seal Rings 34716-01

  • Material: PTFE
  • Seal Style: Solid
  • Height: 0.096"
  • Width: 0.101"
  • Outer Dia.: 0.918"
    Helps cure:
  • Wear grooves in the Forward drum ID bore
  • Delayed engagement
  • Burnt Forward clutch
Pinion Batwing Washer

Pinion Batwing Washer 34880-03

Output & reaction planetaries, '99-later

    Helps cure:
  • Lost or damaged component
Pinion Pin

Pinion Pin 34875-01

Fits output and reaction planetaries for all model years.

    Helps cure:
  • Lost or damaged component
Pinion Roller

Pinion Roller 34875-05

Overdrive planetary, .855" long rollers fit '98-earlier only.

  • Length: 0.855"
  • Dia.: 0.125"
    Helps cure:
  • Lost or damaged component
Pinion Roller

Pinion Roller 34880-02

Output & reaction planetaries, 1999 & Later

    Helps cure:
  • Lost or damaged component
Pinion Thrust Washer

Pinion Thrust Washer 34875-04

For '98-earlier output and reaction planetaries with .750" wide pinion gears.

    Helps cure:
  • Lost or damaged component
Pinion Washer

Pinion Washer 34875-03

For output and reaction planetaries

    Helps cure:
  • Lost or damaged component
Planetary Rebuild Kit

Planetary Rebuild Kit 34875RK

Output & reaction planetaries, '69–'98 with .750" wide pinion gears

    Helps cure:
  • Lost or damaged component
Planetary Thrust Bearing

Planetary Thrust Bearing 34821-01

  • Bearing Style: Enclosed
  • Material: Hardened Steel
  • Outer Dia.: 1.802"
  • Thickness: 0.168"
  • Inner Dia.: 1.132"
    Helps cure:
  • Lost or damaged component
Rear Unit Endplay Shim

Rear Unit Endplay Shim 34006-05

.005" Thick

  • Material: Steel
  • Inner Dia.: 2.375"
  • Thickness: 0.005"
  • Outer Dia.: 3.250"
    Helps cure:
  • Excess rear endplay
Rubber Clutch Separator

Rubber Clutch Separator ORCS-103-380

For use with frictions about .080" thick.

  • Material: Silicone Rubber
  • Dia.: 0.103"
  • Length: 0.380"
Thrust Bearing

Thrust Bearing 65405

4L80-E/4L85-E: Fits OD planet/fwd drum; 200: Fits front internal gear-to-carrier

  • Bearing Style: Enclosed
  • Material: Hardened Steel
  • Outer Dia.: 2.351"
  • Thickness: 0.140"
  • Inner Dia.: 1.604"
    Helps cure:
  • Bearing noise
  • Bearing failure
Pump
Boost Valve Kit

Boost Valve Kit 34200-10K

With encapsulated relief valve. O-Ring style

    Helps cure:
  • Uncontrollable line rise
  • High line pressure
  • Broken parts
  • Broken clutch piston
Boost Valve Kit

Boost Valve Kit 34200-01K

O-Ring style. Kit can be retrofit to back to '89 units. See instructions for details.

    Helps cure:
  • Uncontrollable line rise
  • High line pressure
  • Broken parts
  • Broken clutch piston
Boost Valve Kit

Boost Valve Kit 34200-03K

Fits '91-later units with factory-style sleeve, no O-rings. Can be retrofitted to '89–91 units. See instructions for details.

    Helps cure:
  • Uncontrollable line rise
  • High line pressure
  • Broken parts
  • Broken clutch piston
Line Pressure Booster Kit

Line Pressure Booster Kit 4L80E-LB1

Lube Regulated Pressure Regulator Valve

Lube Regulated Pressure Regulator Valve 34200-14K

    Helps cure:
  • Engine surge at idle
  • Low cooler flow
  • Low TCC release pressure
O-Ringed End Plug Kit

O-Ringed End Plug Kit 34994-14K

Fits .668" dia. TCC valve bores.

    Helps cure:
  • No converter apply
O-Ringed End Plug Kit

O-Ringed End Plug Kit 34200-05K

TCC & PR Valves

  • Dia.: 0.625"
    Helps cure:
  • Pressure loss
  • TCC apply concerns
  • Burnt clutches
  • Harsh shifts
  • Soft shifts
O-Ringed End Plug Kit

O-Ringed End Plug Kit 34994-13

Fits TCC shift valve bore with .497" dia.

    Helps cure:
  • No converter apply
  • Burnt converter
Stator Support Bushing

Stator Support Bushing 34016-W

Front Stator Support

  • Bushing Style: Precision
  • Material: Steel-backed bimetal
  • Width: 0.675"
  • Shaft Dia.: 1.123"
  • Housing Bore: 1.244"
    Helps cure:
  • TCC slip codes
  • No lockup
  • Overheated fluid
  • No Overdrive
Valve Body (View Valve Body Layout Diagram)
#7 Low/Reverse Checkball Seat

#7 Low/Reverse Checkball Seat 34200-52

Fits '95-later units.

    Helps cure:
  • Burnt Reverse band
  • Delayed Reverse
  • No Reverse
  • No engine braking in manual low
1-2 & 2-3 Shift Valve Spring Kit

1-2 & 2-3 Shift Valve Spring Kit 34994-02K

    Helps cure:
  • Repeated Solenoid B code 86
  • Repeated Solenoid B code 87
  • 2nd Gear starts
  • No 4th
  • 3-4 Neutral
  • No 3rd
2-3 Accumulator Spring

2-3 Accumulator Spring 34931-01

3rd & Reverse Checkball Sleeve Kit

3rd & Reverse Checkball Sleeve Kit 34200-47K

Fits units '95-later.

    Helps cure:
  • 3rd Slip
  • 4th Slip
  • Gear ratio codes
  • Direct clutch burned
  • Reverse slip
AFL Filter End Plug & O-Ring Kit

AFL Filter End Plug & O-Ring Kit 34994-17K

    Helps cure:
  • Broken AFL filters
  • 2nd Gear starts
  • Leaking AFL end plug
  • Code 68, 85, 86, 87
  • No upshifts
Actuator Feed Limit Valve Kit

Actuator Feed Limit Valve Kit 34200-16K

    Helps cure:
  • Wrong gear starts
  • Clutch failure
  • Solenoid performance codes
  • No 4th
  • Band failure
  • Low solenoid feed pressure
  • 2-3 Neutral
  • 2nd Gear starts
  • Code 68, 85, 86, 87
    Tooling:
  • 77754-TL
Checkball

Checkball 10000-08

Imidized Plastic, .250" Dia.

  • Material: Imidized Plastic
  • Dia.: 0.250"
    Helps cure:
  • Lost or damaged component
EPC Solenoid Harness Adapter

EPC Solenoid Harness Adapter 34435-01K

For use with early-style ('92–'02) EPC solenoid in late-style (’03-later) units, solenoid not included.

    Helps cure:
  • Line pressure instability
Oversized Accumulator Control Valve Kit

Oversized Accumulator Control Valve Kit 34994-22K

    Helps cure:
  • Soft shift & low accumulator pressure
  • High line pressure in Drive
  • Low line rise in Reverse
    Tooling:
  • F-34994-TL22
  • VB-FIX
Oversized TCC Regulator Valve Kit

Oversized TCC Regulator Valve Kit 34994-18K

    Helps cure:
  • TCC codes
  • TCC apply & release concerns
  • Converter shudder
  • Burnt converter
    Tooling:
  • F-34994-TL18
  • VB-FIX
Performance Pack

Performance Pack HP-4L80E-01

Pressure Switch Manifold

Pressure Switch Manifold 24222077

'91-Later

    Helps cure:
  • Shift concerns
Reverse Checkball Sleeve

Reverse Checkball Sleeve 34200-38

Fits units '95-later.

    Helps cure:
  • Reverse slip
  • Gear ratio codes
  • 3rd Slip
  • 4th Slip
  • Direct clutch burned
  • No Reverse
Smart-Tech® Overrun Clutch Valve Kit

Smart-Tech® Overrun Clutch Valve Kit 34200-40K

Fits units '97-later.

    Helps cure:
  • OD roller clutch failure
  • No Forward
  • Overrun clutch distress
TCC Regulator Valve Kit

TCC Regulator Valve Kit 34994-01K

    Helps cure:
  • TCC codes
  • TCC apply & release concerns
  • Converter shudder
  • Burnt converter
The Sure Cure® Kit

The Sure Cure® Kit SC-4L80E

    Helps cure:
  • Burnt converter
  • Bushing walks out
  • Case damage
  • Clutch failure
  • Band failure
  • Solenoid performance codes
  • Broken parts due to excessive line pressure
  • Buzzing noise
  • Metal contamination
  • Output shaft & case damage
  • High line pressure
  • Uncontrollable line rise
  • 2-3 Neutral
  • 3-4 Neutral
  • No 4th
  • 2nd Gear starts
  • Wrong gear starts
  • Converter shudder
  • TCC apply & release concerns
  • TCC slip codes
    Tooling:
  • 77754-TL
Vacuum Test Plate Kit

Vacuum Test Plate Kit 34994-VTP

    Tooling:
  • VACTEST-01K
Vacuum Test Plate Kit Seal

Vacuum Test Plate Kit Seal 34994-VTP-S

    Tooling:
  • 34994-VTP
  • VACTEST-01K
Case
Case Bushing

Case Bushing 34006-SP

Case, No Walk Out

  • Material: Bronze
  • Bushing Style: Precision
  • Width: 0.690"
  • Shaft Dia.: 2.006"
  • Housing Bore: 2.129"
    Helps cure:
  • Bushing walks out
Case Saver Retainer

Case Saver Retainer 34762-20

Fits '99-later

Case Saver Retainer

Case Saver Retainer 34762-10

Fits all TH400 and '98-earlier 4L80-E.

Heavy Duty Case Bushing Kit

Heavy Duty Case Bushing Kit 34006-SPB

Manual Shift Shaft Kit

Manual Shift Shaft Kit 38511-01K

'91–'94 Without external NSS, short version

    Helps cure:
  • Lost or damaged component
Manual Shift Shaft Kit

Manual Shift Shaft Kit 38511-03K

Short Version, Retrofits ’95-later detent levers to early ’91-’94 units without external NSS.

    Helps cure:
  • Lost or damaged component
Manual Shift Shaft Kit

Manual Shift Shaft Kit 38511-04K

Long version, fits '95-later units with external neutral safety switch. '95-Later with external neutral safety swich

    Helps cure:
  • Lost or damaged component
Shift Cable Mount Bracket

Shift Cable Mount Bracket 34913-01

    Helps cure:
  • Early cases without shifter bracket bosses cannot be used in '96–'97 vehicles
  • Damaged OE shifter bracket bosses
Servo/Band
Adjustable Rear Servo Pin Kit

Adjustable Rear Servo Pin Kit 34912-01K

Fits all TH400 & '95-earlier 4L80-E.

Heavy Duty Low/Reverse Servo Piston

Heavy Duty Low/Reverse Servo Piston 34914-01

Fits all TH400 & '95-earlier 4L80-E.

Heavy Duty Low/Reverse Servo Piston

Heavy Duty Low/Reverse Servo Piston 34914-02

Fits '96-later

Retaining Clip

Retaining Clip 34989-01

Rear Servo Piston. Fits '91–'95 only.

    Helps cure:
  • Lost or damaged component
Reverse Servo Spacer Kit

Reverse Servo Spacer Kit 34528-01K

Fits '96-later.

    Helps cure:
  • Broken Low/Reverse servo piston
  • No Reverse
Other
4th Accumulator Repair Kit

4th Accumulator Repair Kit 34805-01K

    Helps cure:
  • Damaged accumulator bore
  • Poor shift quality
  • Loss of accumulator control
Tool Kit

Tool Kit F-34994-TL18

    Tooling:
  • VB-FIX
Tool Kit

Tool Kit 77754-TL

Tool Kit

Tool Kit F-34994-TL22

    Tooling:
  • VB-FIX
Wiring Harness Connector Bracket

Wiring Harness Connector Bracket 34998-01K

Fits late style, gray connector

    Helps cure:
  • Connector pushed into pan area
  • Retention tabs break off wiring harness connector

Tech Resources

January 25, 2023

Uncovering the Root Cause of Pressure & Complaints – The Critical Role of Solenoid Modulator & AFL Valves

Maura Stafford

October 13, 2022

Line-to-Lube/Converter: A Balancing Act — PR Valve Position is Key

Maura Stafford

September 29, 2021

See What's Inside the New Sonnax 4L80-E Performance Pack

September 14, 2020

Transmissions & Oversized Tires: How Changing Gear Ratios Helps Prevent Drivetrain Damage

Jason Larochelle

June 08, 2020

Hydraulics Fundamentals Part VIII: Check Valves

April 20, 2020

Hydraulics Fundamentals Part VII: AFL/Solenoid Modulator Valves

December 23, 2019

GM 4L80-E, 4L85-E, TH400 Valve Body Layout

May 03, 2019

Hydraulics Fundamentals Part IV: Converter Clutch Control

Bob Warnke

October 24, 2018

Clean Up Your Shifts with Sonnax Line Pressure Booster Kits

February 12, 2018

Transmission Report: How Small Changes Led to the New Form & Function of Gen. 2 6T70/75 Valve Bodies

August 15, 2017

Basic Installation Steps for the Smart-Tech® Overrun Clutch Valve Kit

June 22, 2017

Outsmarting 4L80-E Overdrive Roller Clutch Failure

May 24, 2017

Your Guide to Summer Towing Transmission Repairs & Upgrades

March 29, 2017

Transmission Report: Sonnax Voted Tops for Parts & Tools!

March 02, 2017

It’s Snow Plowing Season Again! Understanding 4L80-E Overdrive Roller Clutch Failure

Jim Dial

December 23, 2015

Playing with Transmissions: Setting Total Endplay to Prevent TH400 Gear Train Failure

Randall Schroeder

April 07, 2015

Drilling Orifices the Smart Way

February 21, 2013

GM 4L80-E Vacuum Test Guide

January 01, 2013

GM 4L80-E Case Checkball Locations

Valve Body Xpress

January 01, 2013

GM 4L80-E Valve Body Identification

Valve Body Xpress

January 22, 2012

Reverse Drum Wear: a 4L80-E True Story

Randall Schroeder

January 22, 2012

Diagnosing the Elusive NO REVERSE with the 4L80-E

Randall Schroeder

April 02, 2008

An Easier Way to Rebuild Planets

Gregg Nader

September 05, 2007

Conquering the Planets

Gregg Nader

May 19, 2006

SonnaFlow® Chart: 4L80-E (Poor)

May 19, 2006

SonnaFlow® Chart: 4L80-E (Normal & Poor)

May 19, 2006

SonnaFlow® Chart: 4L80-E (Normal)

September 16, 2005

GM TCC Circuits

Maura Stafford

January 14, 2005

AFL and AFL

Frank Biolsi

September 15, 2003

Beyond 1870: GM Converter Codes P0741, P0742 and 1887

Gregg Nader


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