The clutch is not fully releasing (disengaging).

Verify that the clutch is releasing properly.

Air is in the clutch hydraulic system.

Bleed the air from the clutch hydraulic system.

Refer to Hydraulic Clutch Bleeding in Clutch.

The transmission shift linkage is out of adjustment.

Inspect the transmission shift linkage and adjust the shift linkage if necessary.

Refer to Shift Linkage Adjustment .

The transmission shift control is worn or damaged.

1. Remove the transmission shift control.
2. Inspect the transmission shift control and replace if necessary.

Refer to Shift Control Assembly Replacement .

The transmission fluid level is low.

Inspect the transmission fluid level and add the proper fluid as necessary.

Refer to Transmission Fluid Level Inspection .

The transmission contains the incorrect type of transmission fluid.

Drain the transmission fluid, then fill the transmission with the correct type of fluid.

Refer to Transmission Oil Drain and Fill .

The transmission gearshift components or synchronizer assemblies are worn or damaged.

1. Remove the transmission.

Refer to Transmission Replacement .

2. Disassemble and inspect the transmission for worn or damaged gearshift components or synchronizer assemblies.

Replace worn or damaged components as necessary.

Refer to the Transmission Unit Repair Manual.