Synchronizers

- Check spline portion of coupling sleeves, hubs, and gears for wear or cracks.
- Check baulk rings for cracks or deformation.
- Check shifting inserts for wear or deformation.
- Check insert springs for deformation.

Clearance Between Baulk Ring And Gear:

- Measure wear of main drive, 1st and OD baulk rings.

Note: If the clearance is smaller than the wear limit, replace baulk ring.







- Measure wear of 2nd and 3rd baulk rings.
a. Place inner baulk ring in position on synchronizer cone.
b. Hold baulk ring evenly against synchronizer cone and measure distance "A".
c. Place outer baulk ring in position on synchronizer cone.
d. Hold baulk ring evenly against synchronizer cone and measure distance "B".

Standard:
Inner-A 0.6 - 1.1 mm (0.024 - 0.043 in)
Outer-B 0.7 - 0.9 mm (0.028 - 0.035 in)
Wear limit: 0.2 mm (0.008 in)

e. If distance "A" or "B" is smaller than the wear limit, replace baulk ring.




- Measure wear of reverse baulk ring.
a. Place baulk ring in position on reverse cone.
b. Hold baulk ring evenly against reverse cone and measure dimension "A" with dial indicator.

Dimension "A":
Standard -0.1 to 0.35 mm (-0.0039 to 0.0138 in)
Wear limit 0.7 mm (0.028 in)

c. If dimension "A" is larger than the wear limit, replace baulk ring.