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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4-5-6 Clutch Backing Plate 104140A-01
4-5-6 Clutch Steel 104120-02
4-5-6 Clutch Steel 104120-01
Clutch Friction 104120-03
Featured
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 104960-10K
High Capacity 4-5-6 Clutch Apply Piston Kit 104960-20K
Pressure Switch Rebuild Kit 124740-30K
Repairs 4 switches, installation tools not included
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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
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Tooling:
- 124740-TL30
Pressure Switch Rebuild Master Pack 124740-28K
Repairs 40 switches, includes installation tools
-
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
Featured
Boost Valve Kit 104520-12K
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
Featured
Oversized Pressure Regulator & Boost Valve Kit 104520-07K
-
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
Learn More
Featured
Pressure Regulator Valve Kit 104520-14K
Pump Bushing 104034A
PTFE-impregnated
- Bushing Style: Precision
- Material: PTFE-Impregnated Bimetal
- Housing Bore: 1.994"
- Shaft Dia.: 1.834"
- Width: 0.782"
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Helps cure:
- Bushing wear
- Bushing failure
- Excess converter hub-to-bushing clearance
- Pump noise
- Leaking front seal
Pump Slide Spring 104534-HD
Pump Vane 76742
- Width: 0.534"
- Height: 0.706"
- Thickness: 0.079"
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Helps cure:
- Lost or damaged component
Actuator Feed Limit Valve Kit 104740-47K
Center Support Seal Kit 104740-14K
Checkball 10000-08
Imidized Plastic, .250" Dia.
- Material: Imidized Plastic
- Dia.: 0.250"
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Helps cure:
- Lost or damaged component
Clutch Select Valve Spring Kit 104740-02K
Fits mid '10–earlier. Compatible with all models except early, 1st design 6L80 plate 24246916.
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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
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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
TCC Regulator Valve Kit 104740-46K
Featured
Zip Kit® 6L45-6L90-ZIP
Tech Resources
FEATURED
January 30, 2018
GM & BMW 6L80 Family Identification Guide
November 29, 2016
“8” Ball, Center Pocket? Location and Function of New #8 Checkball for 6L80/90
Jim Dial
December 12, 2014
GM 6L45, 6L50, 6L80, 6L90 Valve Body Layout
August 21, 2013
GM 6L45, 6L50, 6L80, 6L90 Vacuum Test Guide
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 and 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
July 01, 2020
Always Identify These Valve Bodies BEFORE You Start a Transmission Rebuild
Andrew Jessiman
June 08, 2020
Hydraulics Fundamentals Part VIII: Check Valves
March 31, 2020
Transmission Report: 6L80, 6L90 Transmission Tech Advisory: Consider an Updated Converter in Your Next Rebuild
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
July 24, 2018
Transmission Report: Introducing Premium GM 6L80 Series Remanufactured Valve Bodies
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
Easy Pressure Switch Rebuilds for 6L- & Gen. 1 6T-Series Units
October 27, 2014
Under Pressure: Shift Quality & Pressure Switches in TEHCM Applications
September 23, 2014