TROUBLESHOOTING A MANUAL TRANSMISSIONCONTINUED
Transmission sticks in gear
Slips out of gear
Transmission leaks oil
Sliding gears tight on shaft splines
Shift linkage out of adjustment
Gear loose on shaft
Gear teeth worn
Excessive end play in gears
Lack of spring tension on shift lever
Badly worn transmission bearings
Oil level too high
Oil seal damaged or installed
Oil throw rings damaged,
improperly installed, or missing
Clean splines or replace shaft or
Replace shaft or gear
Install new spring
Drain to proper level
Install new gaskets
Install new seals
Install new oil throw rings properly
Many problems that seem to be caused by the
transmission are caused by clutch, linkage, or drive
line problems. Keep this in mind before removing and
disassembling a transmission.
6. Remove any cross members or supports.
7. Support the transmission and engine with jacks.
Operate the jack on the engine to take the weight
off the transmission. Be careful not to crush the
Because of the variations in construction of
transmissions, always refer to the manufacturers
service manual for proper procedures in the removal,
disassembly, repair, assembly, and installation. These
operations vary from 6 to 8 hours, depending on
transmission type and vehicle manufacturer.
The basic removal procedures are as follows:
Never let the engine hang suspended by
only the front motor mounts.
8. Depending upon what is recommended by the
service manual, either remove the transmission-
to-clutch cover bolts or the bolts going into the
engine from the clutch cover.
1. Unscrew the transmission drain plug and drain
9. Slide the transmission straight back, holding it
in alignment with the engine. You may have to
2. Remove the drive shaft and install a plastic cap
over the end of the transmission shaft.
3. Disconnect the transmission linkage at the
4. Unbolt and remove the speedometer cable from
the extension housing.
5. Remove all electrical wires leading to switches
on the transmission.
wiggle the transmission slightly to free it from
Once the transmission has been removed from the
engine, clean the outside and place it on your
workbench. Teardown procedures will vary from one
transmission to another. Always consult the service
manual for the type of transmission you are working
on. If improper disassembly methods are used, major
part damage could possibly result.