Transmission Shifts Hard

Transmission Shifts Hard

Diagnostic Aids

An intermittent hard shift may be caused after installation of a new clutch actuator. With a new clutch actuator, the annular seal may not be in the forward position and not allow full clutch release. With a self adjusting clutch, the clutch may be between adjustments and not allow full clutch release. This might be felt by a low clutch pedal load. After several applications, the clutch may adjust properly to give the proper pedal feel.

Test Description

The numbers below refer to the step numbers on the diagnostic table.
3. A static shift test is performed by shifting into all of the gear positions with the engine not operating. While performing the test, one should note how the shift lever movement is felt. Also while shifting from one gear to the other, feel for binding in the shift rails. You should be able to feel the detent plungers operating when coming out of a gear and when going into a gear.
5. A dynamic shift test is performed by shifting into one of the gear positions with the engine operating. Test for the correct mesh of the synchronizers and for the clutch releasing correctly. When shifting into a gear, and shifting out of a gear, you should feel the shift detent plungers operating, and the synchronizers sleeve moving freely.
6. The transmission uses a transmission fluid that allows proper synchronizer operation. The incorrect fluid may cause hard shifting from varnish build up, or from not enough lubrication for proper synchronizer operation. Only use the proper transmission fluid.