February 08, 2018
GM 4L60 (700-R4) and 4L60E series reaction shafts can suffer from spline twist and wear in high-torque applications due to the soft, weak steel of OE and most aftermarket shafts. Sonnax heavy duty reaction shaft 74602-01K is made from high-strength chromoly steel alloy to eliminate these problems. It's also a universal fit for all carrier styles thanks to the included bearing and shim, making it an easy, reliable way to build extra durability into any big power 4L60E transmission. Watch this video to see how it all comes together.
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