GM 6L80 Transmission Parts
About the 6L80 Transmission
Introduced in 2006, the 6L80 is a popular, 6-speed, RWD transmission produced for more than 8 million trucks, SUVs and cars. It's used by GM in about 20 models, most widely in the Chevy Silverado, Tahoe and Suburban, the GMC Sierra and Yukon, and the Cadillac Escalade. The 6L80 also is found in the Chevy Corvette and GMC Hummer. A heavy-duty version of the 6L80 — the 6L90— was introduced in 2007 for select GM trucks and vans.
Common Transmission Symptoms
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Remanufactured Valve Body
Internal
1-2-3-4/3-5-R Drum Bushing 104030-03
- Bushing Style: Precision
- Material: Steel-backed alloy
- Housing Bore: 2.346"
- Shaft Dia.: 2.184"
- Width: 0.532"
-
Helps cure:
- Premature wear & bushing failure
2-6/3-5-R Hub Front Bushing 104030-02
- Bushing Style: Precision
- Material: Steel-backed alloy
- Housing Bore: 1.600"
- Shaft Dia.: 1.465"
- Width: 0.506"
-
Helps cure:
- Premature wear & bushing failure
2-6/3-5-R Hub Rear Bushing 104030A-01
- Bushing Style: Precision
- Material: Steel-backed alloy
- Housing Bore: 1.590"
- Shaft Dia.: 1.465"
- Width: 0.506"
-
Helps cure:
- Premature wear & bushing failure
4-5-6 Clutch Backing Plate 104140A-01
4-5-6 Clutch Drum Bushing 104030-05
- Bushing Style: Precision
- Material: Steel-backed alloy
- Housing Bore: 0.819"
- Shaft Dia.: 0.685"
- Width: 0.520"
-
Helps cure:
- Premature wear & bushing failure
4-5-6 Clutch Steel 104120-02
4-5-6 Clutch Steel 104120-01
Bushing Kit 104030A-01K
- Bushing Style: Precision
- Material: Steel-backed alloy
-
Helps cure:
- Premature wear & bushing failure
- Code P0741
- TCC apply & release concerns
- Clutch failure
- Harsh shifts
- Gear ratio & solenoid codes
Case Bushing 104030A-04
- Bushing Style: Precision
- Material: PTFE-Impregnated Bimetal
- Housing Bore: 2.199"
- Shaft Dia.: 2.062"
- Width: 0.591"
-
Helps cure:
- Premature wear & bushing failure
Clutch Friction 104120-03
Front Center Support Bushing 104030-06
- Bushing Style: Precision
- Material: Steel-backed alloy
- Housing Bore: 2.018"
- Shaft Dia.: 1.890"
- Width: 0.413"
-
Helps cure:
- Premature wear & bushing failure
Heavy Duty 1-2-3-4 Piston 104984-01
Featured
Heavy Duty 4-5-6 Clutch Apply Piston Kit 104960-01K
High Capacity 3-5-R Apply Ring 104548-01
High Capacity 4-5-6 Clutch Apply Piston Kit 104960-20K
High Capacity 4-5-6 Clutch Apply Piston Kit 104960-10K
Output Planet Saver Kit 104584-80K
-
Helps cure:
- Lube failures
- Planetary failure
- Loss of lubrication oil to planetaries
- Burnt parts & planetaries
- Gear train noise
Output Planetary Lube Dam 104584LP
-
Helps cure:
- Lube failures
- Planetary failure
- Loss of lubrication oil to planetaries
Output Shaft Bushing 104030A-08
- Bushing Style: Precision
- Material: Steel-backed alloy
- Housing Bore: 1.562"
- Shaft Dia.: 1.429"
- Width: 0.512"
-
Helps cure:
- Premature wear & bushing failure
Rear Center Support Bushing 104030A-07
- Bushing Style: Precision
- Material: Steel-backed alloy
- Housing Bore: 2.027"
- Shaft Dia.: 1.890"
- Width: 0.516"
-
Helps cure:
- Premature wear & bushing failure
Stator Support Bushing Kit 104036AK
- Bushing Style: Precision
- Material: Steel-backed bronze
-
Helps cure:
- Premature wear & bushing failure
- Code P0741
- TCC apply & release concerns
Pump
Featured
Boost Valve Kit 104520-12K
Featured
Line Pressure Booster Kit 6L80-LB1
Oversized Converter Feed Limit Valve 104520-11
-
Helps cure:
- High TCC slip RPM
- Code P0218
- Code P0741
- Overheated converter
- Inadequate lubrication
- Excess converter pressure
-
Tooling:
- F-104520-TL11C
- VB-06
- VB-FIX
Oversized Pressure Regulator & Boost Valve Kit 104520-16K
-
Helps cure:
- Erratic line pressure
- High line pressure
- Low line pressure
- Clutch slippage
- Harsh shifts
- Low cooler flow
- Burnt clutches
- No cooler flow
- Overheated transmission
- Converter concerns
-
Tooling:
- F-104520-TL7C
- VB-06
- VB-FIX
Pressure Regulator Valve Kit 104520-15K
Pump Bushing 104034A
Not for use in 6L45 BMW models, which have a bearing in that position.
- Bushing Style: Precision
- Material: PTFE-Impregnated Bimetal
- Housing Bore: 1.994"
- Shaft Dia.: 1.834"
- Width: 0.782"
-
Helps cure:
- Premature wear & bushing failure
- Excess converter hub-to-bushing clearance
- Pump noise
Pump Slide Pivot Pin & Spring Kit 104553-03K
-
Helps cure:
- Erratic line pressure
- Pump leaks
- Pump noise
Pump Slide Spring 104534-HD
Pump Vane 76742
- Width: 0.534"
- Height: 0.706"
- Thickness: 0.079"
-
Helps cure:
- Lost or damaged component
Valve Body
(View Valve Body Layout Diagram)
Actuator Feed Limit Valve Kit 104740-47K
CBR1/4-5-6 Clutch Regulator Valve 104740-50
Center Support Seal Kit 104740-14K
Clutch Select Valve Spring Kit 104740-02K
Fits mid '10–earlier. Compatible with all models except early, 1st design 6L80 plate 24246916.
-
Helps cure:
- Code P0751
- 1-2-3-4 Clutch burned
- 3-5-Reverse clutch burned
- Cruise control disabled
Featured
Compensator Feed Regulator Valve Kit 104740-09K
O-Ringed End Plug Kit 104740-23K
Oversized Actuator Feed Limit Valve 104740-12
-
Helps cure:
- Solenoid performance codes
- Clutch failure
- Wrong gear starts
- Harsh shifts
- Soft shifts
-
Tooling:
- F-104740-TL12
- VB-FIX
Oversized Clutch Boost Valve 104740-01
Fits any of 3 locations
-
Helps cure:
- Shift quality is not load sensitive
- Clutch pressure solenoid codes
- Burnt clutches
- Delayed engagement
- Harsh shifts
- Slide shifts
- Slip codes
- Slips & flares
-
Tooling:
- F-104740-TL
- VB-FIX
Featured
Oversized TCC Regulator Valve Kit 104740-07K
-
Helps cure:
- Code P0741, P0742
- High TCC slip RPM
- Overheated fluid
- Failsafe mode
- Harsh shifts
- Harsh TCC apply
- Loss of fuel economy
-
Tooling:
- F-104740-TL7
- VB-FIX
Learn More
Pressure Switch Rebuild Kit 124740-70K
-
Helps cure:
- Pressure switch codes
- Switch codes
- Pressure control out-of-range codes
- Slips, flares & bind-ups
- Failsafe mode
- Erratic TCC apply
- Harsh shifts
- Shift codes
-
Tooling:
- 124740-TL70
Featured
Remanufactured TEHCM GM6L-TEHCM-C6
Typically fits Cadillac 2012–2015, Chevrolet 2011–2020, GMC 2011–2020, Isuzu 2012–2016.
-
Helps cure:
- Solenoid electrical circuit faults
- Solenoid performance codes
- Gear ratio codes
- Poor shift quality
- TCC codes
- Internal memory codes
- Temperature sensor codes
Learn More
Featured
Remanufactured TEHCM GM6L-TEHCM-C5
Typically fits Cadillac 2010–2011, Chevrolet 2010–2013, GMC 2010–2011.
-
Helps cure:
- Solenoid electrical circuit faults
- Solenoid performance codes
- Gear ratio codes
- Poor shift quality
- TCC codes
- Internal memory codes
- Temperature sensor codes
Learn More
TCC Regulator Valve Kit 104740-46K
The Sure Cure® Kit SC-6L80-6L90
-
Helps cure:
- Burnt clutches
- High TCC slip RPM
- Shift concerns
- Low cooler flow
- Harsh shifts
- Clutch slippage
- Overheated transmission
- Code P0218
- Code P0741, P0742
Featured
Zip Kit® 6L45-6L90-ZIP
Case
Extension Housing Bushing 104066A
RWD models only
- Bushing Style: Precision
- Material: Steel-backed alloy
- Housing Bore: 2.021"
- Width: 1.000"
- Shaft Dia.: 1.885"
-
Helps cure:
- Premature wear & bushing failure
Tech Resources
FEATURED
August 21, 2013
Vacuum Test Guide
GM 6L45, 6L50, 6L80, 6L90 Vacuum Test Guide
January 30, 2018
Identification Guide
GM & BMW 6L80 Family Identification Guide
July 01, 2020
Identification Guide
Always Identify These Valve Bodies BEFORE You Start a Transmission Rebuild
Andrew Jessiman
September 17, 2021
Valve Body Layout
GM 6L45, 6L50, 6L80, 6L90 Valve Body Layout
November 29, 2016
“8” Ball, Center Pocket? Location and Function of New #8 Checkball for 6L80/90
Jim Dial
April 10, 2025
6L80 Series Pressure Regulator Valve Kits — Now, No Drilling Required!
December 04, 2023
How to Easily Remove & Replace a 6L80, 6L90 Output Planetary Lube Dam
July 28, 2023
6L80, 6L90 Remanufactured TEHCMs for Top-Quality, Affordable Repairs
May 22, 2023
Transmission Repair Tip: How to Use Small Drill Bits with a Portable Drill Motor
Jim Mobley
March 08, 2023
GM 6L45/50, 6L80/90 No Movement Conditions: Analysis & Repair Tips
Jim Mobley
January 25, 2023
Uncovering the Root Cause of Pressure & Complaints – The Critical Role of Solenoid Modulator & AFL Valves
Maura Stafford
December 29, 2022
Clutch Control Valves in Later Units vs. Shift Valves in Early — Why Wear is Critical to Detect
October 13, 2022
How to Get Started with OE ECU Reprogramming
Jim Mobley
March 15, 2022
6L80 Series Pump Drilling Demo with Small Drill Bit Vise
Jim Mobley
March 30, 2021
The Evolution of Automatic Transmissions Part 1: A Brief History
Jason Larochelle
March 17, 2021
6L80 Series Pressure Regulator Valve Repairs: Pump Drilling Explained
March 09, 2021
Why Do I Drill the Pump? Preventing Excess 6L80 Series Line Pressure with a Drop-In Sonnax PR Valve
Andrew Jessiman
February 12, 2021
6L80 & 6L90 Upgrade Options for the 4-5-6 Clutch
December 17, 2020
Hydraulics Fundamentals Part X: Shift & Relay Valves
Jim Dial
November 20, 2020
Hydraulics Fundamentals Part IX: Clutch Regulator Valves — Controlling Shift Apply & Feel
September 14, 2020
Transmissions & Oversized Tires: How Changing Gear Ratios Helps Prevent Drivetrain Damage
Jason Larochelle
July 20, 2020
Conquering the GM Compensator Clip Conundrum
Andrew Jessiman
June 08, 2020
Hydraulics Fundamentals Part VIII: Check Valves
March 31, 2020
6L80, 6L90 Transmission Tech Advisory: Consider an Updated Converter in Your Next Rebuild
March 26, 2020
Hydraulics Fundamentals Part VI: Converter Limit Valves
John Varvayanis
January 29, 2020
Bushwhacked! Keys to Avoiding Preventable Bushing Problems
Brian Wing
February 26, 2019
Hydraulics Fundamentals Part II: Accumulators & Shift Feel
Maura Stafford
October 24, 2018
Clean Up Your Shifts with Sonnax Line Pressure Booster Kits
May 24, 2017
Your Guide to Summer Towing Transmission Repairs & Upgrades
March 09, 2015
GM 6L80 Series Transmission Upgrades & Repairs
January 13, 2015
SonnaFlow® Chart: 6L90, 2011 Truck (with Tow Pack)
October 28, 2014
How to Rebuild TEHCM Pressure Switches in GM 6L45/50/80/90 & Gen. 1 6T70/75 Transmissions
October 27, 2014
Under Pressure: Shift Quality & Pressure Switches in TEHCM Applications
September 23, 2014