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February 12, 2021
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6L80 & 6L90 Upgrade Options for the 4-5-6 Clutch

Presented by Sonnax

If you aren't sure which Sonnax GM 6L80, 6L90 4-5-6 upgrades are right for your transmission build, this video breaks down all the options.

High Performance Product Line Manager Gregg Nader explains the different levels of clutch capacity available for stock/HD commercial and lightly modded street/strip performance vehicles all the way up to extreme racers. Then it's time to dig into how each part improves transmission durability with a look at the unique heavy duty and high capacity 4-5-6 piston kits plus heavy duty/extreme duty 4-5-6 hub and intermediate shafts.

Learn more about Sonnax 6L80, 6L90 transmission repairs and upgrades.

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Related Units

6L90 Transmission 6L80 Transmission


Related Parts

Required

Recommended

6L80, 6L90 Heavy Duty 4-5-6 Clutch Apply Piston Kit 104960-01K

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, 6L90 High Capacity 4-5-6 Clutch Apply Piston Kit 104960-20K

6L80, 6L90

High Capacity 4-5-6 Clutch Apply Piston Kit 104960-20K

Use with Powerglide-style, 45-tooth frictions, Sonnax steels & 45-tooth 4-5-6 hub.

Required

Recommended

6L80, 6L90 High Capacity 4-5-6 Clutch Apply Piston Kit 104960-10K

6L80, 6L90

High Capacity 4-5-6 Clutch Apply Piston Kit 104960-10K

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

Required

Recommended

6L80 Heavy Duty 4-5-6 Clutch Hub & Intermediate Shaft 104680-36

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

6L80, 6L90 4-5-6 Clutch Steel 104120-01

6L80, 6L90

4-5-6 Clutch Steel 104120-01

Wide, for use with Powerglide-style, 45-tooth frictions.

  • Thickness: 0.078"

Required

Recommended

6L80, 6L90 4-5-6 Clutch Steel 104120-02

6L80, 6L90

4-5-6 Clutch Steel 104120-02

Wide, for use with Powerglide-style, 45-tooth frictions.

  • Thickness: 0.090"

Required

Recommended

6L90 Extreme Duty 4-5-6 Clutch Hub & Intermediate Shaft 104690-45

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

6L80, 6L90, Powerglide Clutch Friction 104120-03

6L80, 6L90, Powerglide

Clutch Friction 104120-03

  • Material: High Energy
  • Thickness: 0.060"

Required

Recommended

6L90 Heavy Duty 4-5-6 Clutch Hub & Intermediate Shaft 104690-36

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

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.

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