1. Measure the thickness of the shift fork fingers. If the thickness is not within the standard, replace the shift fork. If the thickness is within the standard, replace the synchro sleeve. If one arm of the shift fork shows more wear than others, the fork may be bent and needs to be replaced. Standard:
   1st/2nd, 3rd/4th, 5th/6th: | 7.4−7.6 mm (0.29−0.30 in.)
   Reverse: | 6.2−6.4 mm (0.24−0.25 in.)