E40D / 4R100 Shift Correction Package
This kit makes extensive pump modifications needed to avoid pump failure. Shift slippage is a real concern in this transmission. This kit cleans up this problem very effectively. The KE4OD Shift Correction Package includes a metal replacement drain back valve to replace the O.E. plastic valve. The O.E. valve can melt, cutting off lube to the overdrive planets causing failure.