GM 6L80 Series Transmission Upgrades & Repairs

Presented by Sonnax

Sonnax High Performance Product Line Manager, Gregg Nader, delivers an in-depth look at four popular GM 6L80-series transmission upgrades and repairs. Featured products include the heavy-duty 4-5-6 clutch apply piston kit, high-strength pump slide spring, proven line pressure booster kit and award-winning Zip Kit®.

Related Units

Related Parts

Required

Recommended

6L45, 6L50, 6L80, 6L90

Line Pressure Booster Kit 6L80-LB1

Required

Recommended

6L45, 6L50, 6L80, 6L90

Zip Kit® 6L45-6L90-ZIP

Helps cure:

• Burnt clutches
• Delayed engagement
• 3-4 Bump
• Inadequate lubrication
• Low pressure
• Slips & flares
• Soft shifts
• TCC apply & release concerns
• TCC codes

Required

Recommended

6L80, 6L90

Pump Slide Spring 104534-HD

Required

Recommended

6L80, 6L90

Heavy Duty 4-5-6 Clutch Apply Piston Kit 104960-01K

Use with OE-style, 36-tooth frictions & OE steels.

Required

Recommended

6L80

Heavy Duty 4-5-6 Clutch Hub & Intermediate Shaft 104680-36

Use with OE-style, 36-tooth frictions & OE steels.

• Material: 300M
• Tooth Count: 36-T OE hub spline

Required

Recommended

6L90

Extreme Duty 4-5-6 Clutch Hub & Intermediate Shaft 104690-45

Use with Powerglide-style, 45-tooth frictions, Sonnax steels & high capacity piston kit 104960-20K.

• Material: 300M
• Tooth Count: 45-T Powerglide-style hub spline

Required

Recommended

6L90

Heavy Duty 4-5-6 Clutch Hub & Intermediate Shaft 104690-36

Use with OE-style, 36-tooth frictions & OE steels.

Required

Recommended

6L80

Extreme Duty 4-5-6 Clutch Hub & Intermediate Shaft 104680-45

Use with Powerglide-style, 45-tooth frictions, Sonnax steels & high capacity piston kit 104960-20K.

• Material: 300M
• Tooth Count: 45-T Powerglide-style hub spline

While Sonnax makes every effort to ensure the accuracy of technical articles at time of publication, we assume no liability for inaccuracies or for information which may become outdated or obsolete over time.