4th Gear

Fig 1: Identifying Power Flow - 4th Gear

Courtesy of FORD MOTOR CO.

The input shaft drives the output shaft.
The 4th gear on the input shaft drives 4th gear on the output shaft.
The 3rd/4th gear synchronizer is splined to the input shaft.
When the 3-4 synchronizer sleeve is shifted rearward, 4th gear is locked to the input shaft.
The output shaft drives the differential ring gear.
The power flows through the side and pinion gears to the half shafts.