10. Using a pair of external snap ring pliers, remove the snap rings from both ends of the shifter fork shaft, and slide all three forks from the shaft. Then take the first and third fork and insert it into the sliding gear on the layshaft. Be careful not to install it upside down. Using a blade type feeler gauge, measure the clearance between the thrust pads on the fork and the inside of the groove in the gear (Fig. 42). Check both pads on the fork and both sides of each pad. If you can insert a feeler,gauge larger than .020" in any of these places, replace the shift fork. Repeat this procedure with each fork by inserting it into its respective gear or dog, and checking the clearance.

11. There is a peg on the rear of each shift fork that fits into one of three machined grooves in the shifting drum. You must now measure the diameter of each peg and measure the critical part of its corresponding groove in the shift drum. This will tell you how much side movement the shift forks will have when they are engaged in each particular gear. If this side play is excessive, it could be the cause of a transmission jumping out of gear, or missed shifts. First measure the diameter of the peg on the first-third shift fork (Fig. 43.). Write

FIG. 42

FIG. 43

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