The input shaft is a block of drive gears, one part of which is made on the input shaft, and the other is pressed with a large interference fit. Therefore, the input shaft of the gearbox is a non-separable structure and only bearings can be replaced.
Troubleshooting the input shaft, its gears and bearings is similar to troubleshooting the output shaft (see «Repair of a secondary shaft of a transmission»). To repair the input shaft of the gearbox on a car, you will need: a universal puller, a hammer, a mandrel.
To replace the rear bearing 3 of the input shaft, press it with a puller and press the new input shaft bearing to the stop using an appropriate mandrel, applying force only to the inner race of the bearing. When replacing the input shaft front bearing, pay attention to the fact that a thrust ring 2 is installed under its inner ring 1 on the input shaft of the gearbox.