Automatic Transaxle - ZF 4HP 16 - Service, Overhaul, Removal & Installation, Troubleshooting & Diagnosis: Reverse: Notes

In Reverse, the transaxle drive is through the input shaft and clutch B. The elements of this transaxle operation are as follows:

1. Clutch B is engaged and drives the reverse sun gear in a clockwise direction.
2. The D band is engaged and holds the planetary gear carrier stationary, causing the differential pinion to rotate clockwise.
3. The differential rotates in a counterclockwise direction.
4. The output shaft is driven in a counterclockwise, or reverse, direction.