Diesel Data: Automotive Repair

Countershaft Assembly Clearance Inspection

Countershaft Assembly Clearance Inspection

NOTE: If replacement is required, always replace the synchro sleeve and synchro hub as a set.

1. Measure the clearance between 2nd gear (A) and the 3rd gear (B) with a dial indicator.

^ If the clearance is more than the service limit, go to step 2.
^ If the clearance is within the service limit, go to step 3.





2. Measure the thickness of 2nd gear.

^ If the thickness is less than the service limit, replace 2nd gear.
^ If the thickness is within the service limit, replace the 1st/2nd synchro hub and 1st/2nd synchro sleeve as a set.





3. Measure the clearance between list gear (A) and the distance collar (B) with a dial indicator.

^ If the clearance is more than the service limit, go to step 4.
^ If the clearance is within the service limit, go to step 6.





4. Measure the length (1) of the distance collar as shown.

^ If the length (1) is not within the standard, replace the distance collar.
^ If the length (1) is within the standard, go to step 5.





5. Measure the thickness of 1st gear.

^ If the thickness is less than the service limit, replace 1st gear.
^ If the thickness is within the service limit, replace the 1st/2nd synchro hub and 1st/2nd synchro sleeve as a set.





6. Measure the clearance between reverse gear (A) and the distance collar (B) with a dial indicator. If the clearance is more than the service limit, go to step 7.





7. Measure the length (2) of the distance collar as shown.

^ If the length (2) is not within the standard, replace the distance collar.
^ If the length (2) is within the standard, go to step 8.





8. Measure the thickness of reverse gear.

^ If the thickness is less than the service limit, replace reverse gear.
^ If the thickness is within the service limit, replace the reverse synchro hub and reverse synchro sleeve as a set.