February 08, 2018
The flawed design of the 4L60/E OE input housing will always let you down with another burnt 3-4 clutch. When the weak backing plate flexes during clutch apply, heat builds up and the clutches cook. Stop the flex and you stop 3-4 clutch failure.
Watch this video to see the OE backing plate flex and how the Sonnax Smart-Tech® input housing eliminates this issue. It's the ONLY way to guarantee you're getting the most from your favorite clutches.
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Fits 300mm non-reluctor units.
Fits 300mm reluctor-style units only.
Fits '85-later 298mm units with 30-spline input shaft. For '82-84 298mm units with 27-spline input shaft, converter and stator shaft will need to be updated to '85-later design.
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