Shifts Hard

Transmission Shifts Hard





Test 1-10

Diagnostic Aids
Hard shifting can be diagnosed easily. You should perform a static shift and dynamic shift test. Many other simple factors could occur such as insufficient fluid, excessive fluid or even the wrong transmission lubricant. A misaligned transmission can also cause hard shifting as well as a worn or defective clutch, binding of the shift control. Many internal components can also play a factor in hard shifting such as the front bearing retainer loose or cracked, synchronizer worn, damaged or improperly assembled. A failure to fully depress the clutch pedal when shifting will cause hard shifting.

Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
3. This step checks for a faulty shift tower.
5. The ZF S6-650 uses a synthetic transmission fluid. If other fluids were added or if the improper fluids were added, varnish may be on the syncro facing. The varnish would cause improper syncro operation.
7. This step checks for a faulty or worn clutch pressure plate or clutch driven plate.