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6L90 GPZ Friction Clutch Pack
GPZ Friction Clutch Pack Module with 3-5 Reverse Z Pak® and 4-5-6 Z Pak®


6L90 GPZ Friction Clutch Pack


Part No.

Raybestos® Powertrain GM 6L90 GPZ Clutch Pack® contains upgraded friction components manufactured with the unique blend of GPZ high energy fibers for ultimate stress and high temperature durability. This kit also includes the 3-5 Reverse Z Pak® and 4-5-6 Z Pak® to provide solutions to common 6L90 transmission failure points. Z Paks are completely redesigned single-sided clutch systems that outperform OE in torque and heat capacity, without coning.

Recommended Use:

High-stress driving enhanced performance applications, heavy-duty vehicles, commercial vehicles, daily driven vehicles and as a problem solution for 3-5 Reverse and 4-5-6 clutch failure.

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Installation Instructions

6 1-2-3-4 GPZ, 6 2-6 GPZ, 7 4-5-6 GPZ, 6 Low/Reverse GPZ, 1 3-5 Reverse Z Pak® (1 3-5 Reverse Steel, 5 3-5 Reverse ID Spline GPZ, 4 3-5 Reverse OD Spline GPZ, 1 3-5 Reverse DS OD Spline GPZ), 1 4-5-6 Z Pak® (1 4-5-6 Apply Plate Steel, 1 4-5-6 Reaction Plate, 7 4-5-6 SS ID Spline GPZ, 6 4-5-6 SS OD Spline GPZ, 1 SS OD Spline Thin GPZ)(use with steel module part number: 000617)

Part Type:
GPZ Friction Clutch Pack Module with 3-5 Reverse Z Pak® and 4-5-6 Z Pak®

Friction Material Type:

Raybestos Powertrain GPZ friction plates greatly increase transmission performance and durability. This state-of-the-art friction material far exceeds OE material to withstand high stress, high temperatures and repeated cycling. GPZ's outstanding performance benefits are perfect for heavy-duty vehicles and high-stress driving. Testing of GPZ revolutionary friction material shows that it outperforms OE materials by as much as 20%. Plus, its performance improves as the power increases.

WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer and birth defects or other reproductive harm.  For more information go to www.P65Warnings.ca.gov.

  • Re-engineered clutch pack design
  • Takes heat without coning
  • Perfect for every rebuild including heavy duty
  • Eliminates coning under high stress
  • Increases transmission durability
  • GPZ material outperforms OE materials by as much as 20%
  • Made in USA with GPZ material

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