Manual Transmission Symptom Troubleshooting Index (M/T)

Manual Transmission Symptom Troubleshooting Index

Symptom

Diagnostic procedure

Also check for

Hard to shift into 1st gear

1.	Check the clutch.
2.	Check and/or replace the MTF.
3.	Check the change lever assembly.
4.	Check the 1st synchro ring and 1st gear.
5.	Check the 1st/2nd synchro sleeve and hub.

Hard to shift into 2nd gear

1.	Check and/or replace the MTF.
2.	Check the clutch.
3.	Check the change lever assembly.
4.	Check the 2nd synchro ring and 2nd gear.
5.	Check the 1st/2nd synchro sleeve and hub.

Hard to shift into 3rd gear

1.	Check and/or replace the MTF.
2.	Check the clutch.
3.	Check the change lever assembly.
4.	Check the 3rd synchro ring and 3rd gear.
5.	Check the 3rd/4th synchro sleeve and hub.

Hard to shift into 4th gear

1.	Check and/or replace the MTF.
2.	Check the clutch.
3.	Check the change lever assembly.
4.	Check the 4th synchro ring and 4th gear.
5.	Check the 3rd/4th synchro sleeve and hub.

Hard to shift into 5th gear

1.	Check and/or replace the MTF.
2.	Check the clutch.
3.	Check the change lever assembly.
4.	Check the 5th synchro ring and 5th gear.
5.	Check the 5th/6th synchro sleeve and hub.

Hard to shift into 6th gear

1.	Check and/or replace the MTF.
2.	Check the clutch.
3.	Check the change lever assembly.
4.	Check the 6th synchro ring and 6th gear.
5.	Check the 5th/6th synchro sleeve and hub.

Hard to shift into reverse

1.	Check the clutch.
2.	Check and/or replace the MTF.
3.	Check the change lever assembly.
4.	Check the reverse shift fork and reverse idler gear.
5.	Check reverse gears.

Driver can select reverse gear when vehicle speed is 12 mph (20 km/h) or more

Driver cannot select reverse gear when vehicle speed is 9 mph (15 km/h) or less

Noise from the transmission

1.	Check and/or replace the MTF.
2.	Check the MTF level (unfilled or in surplus the transmission with the MTF).
3.	Check the transmission gears.
4.	Check the transmission bearings.
5.	Check the differential carrier, the final driven gear, and the carrier bearings.

Shift lever does not operate smoothly

1.	Check and/or replace the MTF.
2.	Check the change wire and their joints.
3.	Check the shift lever housing with the shift lever shaft.
4.	Check the change lever assembly.

Transmission jumps out of gear

1.	Check and/or replace the MTF.
2.	Check the detent balls and springs for proper size and/or damage.
3.	Check the teeth of the synchro rings and the gears.
4.	Check for bent, deform, or damage of the shift forks.