GM 4L60系列OE输入外壳的限制是性能应用中3-4次燃烧的根本原因。在离合器期间弯曲的弱OE背板弯曲，允许热量在离合器包装有限的空间内不均匀地建造。停止弯曲，您停止3-4离合器故障。

Sonnax Smart-Tech input housing kit 77733-12KA makes room for a taller clutch pack anchored in place by a stronger backing plate — the most reliable way to increase clutch capacity and protect against destructive heat.

To avoid the problems found with older, OE housing designs, Sonnax starts with the latest production, new housings from GM. These improved housings have splines for the input shaft that are cut at minimum spec for reliable shaft retention and sealing. The housings also benefit from added material for a thicker, more consistent cross-section that protects against breakage.

Smart-Tech input housing kit with heavy duty input shaft 77733-12KA fits 300mm reluctor-style units. The high-strength shaft features many unique refinements available only from Sonnax, including a unique design that protects against failure from stress cracks. Both the housing and shaft also are available separately.

• Physically larger clutch pack area for increased 3-4 clutch capacity without sacrificing clutch durability. Use your choice of:
  • 八.067“摩擦七.095”钢材
  • 九.062“摩擦八.077”钢材

• Anchored backing plate keeps clutches parallel to stop the flexing and distortion that leads to heat build-up
• 100% New housing optimizes input shaft fitment and is further upgraded for significantly more resistant to fatigue failure
• Steel reinforcement sleeve prevents breakage in the spline area
• Custom backing plate replaces OE retaining ring to eliminate risk of blowout