47RH 48RE 48RE Overdrive piston retainer, Rear case support

Overdrive piston retainer for Chrysler 4 speed transmission. This part lubricates better than OEM and has an O-ring groove for better seal to The main case. Comes with plugs for governor ports if installing on transmissions with electronic governor. This part is commonly destroyed when debris from cooler enter the rear lube port on transmission case typically galling the Reverse drum to the front of the Case support. We also offer the complete reverse drum.