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Custom Bundle: No

Interchange Part Number: 8626883

Manufacturer Part Number: 031757HP

Brand: Alto

Fitment Type: Direct Replacement

Drive Type: 4WD,RWD

Manufacturer Warranty: Unspecified Length

TH400 Turbo 400 Transmission Intermediate Clutch Set

High Performance Red lining by Alto

fits 1964-98

Increase clutch capacity from 3 to 4 frictions!

Alto's High Performance PowerPack includes the following:

(4) 031742A Red Eagle friction plates (0.062" / 1.57mm)

(4) 031715HK Kolene steel plates - Turbulator style (0.076"/ 1.93mm)

(1) 028252-106 Heavy Duty snap ring (.106" / 2.69mm)

(1) Instructions sheet for proper clutch pack set up

Alto is the recognized leader in Hi-Performance Friction material. We are original manufacturer of Red Eagle ® friction and Kolene Steel® over 35 years ago. Alto was the first to introduce performance automatic transmission clutches and is the market leader. Our products are often imitated but never duplicated.

Alto manufactures a wide range of Hi-Performance friction materials, Performance Steel™ plates, PowerBands® and PowerPacks®.

Red Eagle Friction is the go-to material for most performance applications. The lining has a unique dual saturation, which imparts high friction coefficients and high heat resistance. Red Eagle clutches are designed to limit the amount of "slip" by providing a shorter lock-up time, generating less heat.

Our proprietary process starts with the friction paper saturated in a phenolic resin, cured, and then saturated a second time in a silicate. The silicate imparts high heat resistance.
Red Eagle clutches:
  • Are designed with a softer, more resilient base paper.
  • Assure less wear against opposing steel plates.
  • Reduce the incidence of steel plates burning and warping.

Kolene® Steel

Kolene® is a salt bath nitriding process. In generic terms, it is a thermochemical diffusion process, whereby ferrous parts are processed in molten salt with a specific nitrogen potential. In plain English, it provides a surface treatment that enhances wear and fatigue resistance from 200% to 500% which offers higher heat resistant and increased lubricity.

Kolene® Steel

  • Strengthen wear characteristics
  • Increase fatigue strength
  • Enhance lubricity


Alto created extra capacity clutches.
  • Increased surface area for increased holding
  • Increased surface area for increased heat absorption
  • Increased surface area for shorter lock-up time - decreasing "slippage"

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