4L60 4L60E 4L65E 4L70E Transmission Smart Tech Input Housing 3-4 Clutch Pk 300MM

Sonnax smart-tech 4L60, 4L60E input housing kits w/heavy duty 300MM input shaft non reluctor units the Sonnax smart-tech tackles allthe 3-4 clutch issues of the 4L60 as no other housing has done before! Although incremental improvements to aftermarket parts have been made addressing 4L60-series 3-4 clutch problems, they failed to keep pace with steadily increasing power levels of modern performance engines... until now! Limited 3-4 clutch capacity- anchor (backing) plate works with redesigned apply plate for more room and clutch options for eight or nine frictions for increased torque capacity. 3-4 Backing plate flexing & distortion- zero-flex, bolt-on anchor plate replaces OE backing plate to eliminate clutch pack distortion and uneven clamping pressure. Input housing fatigue failure- treated housing is significantly more resistant to fatigue and failure. 3-4 retaining ring blow-out- fifteen bolts secure anchor plate, eliminating snap-ring and blow-out concerns.