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Shifter finger (2) (late 1976 and later) Shifting fork bushing (2) (early 1976 and earlier)

Figure 4-17. Checking Shifter Clutch Clearance

Check adjustment of shifter forks with Fork Shifter Gauge, Part No. 96384-39, by placing shifter gauge on shifter cover as shown in Figure 4-16. With the 3/8 in. gauge rod furnished, set tool gauge blocks in exact alignment with straight sections of cam slots in shifter cam. Lock gauge blocks in place with thumb screws. Rotate shifter cam and repeat for other cam slot.

Figure 4-16. Adjusting Shifter Gauge

Remove tool from cover, turn it over, and place it on transmission case with shifter fingers engaged in slots on gauge blocks as shown in Figure 4-17. Be sure shifter finger rollers are in place on shifter fingers.

With thickness gauges, check clearance on both sides of shifting clutches. All shifting clutches must be centered.

Clearances between shifter clutch and gear are as follows:

Low and second gear: When centered between gears to have .080-.090 in. clearance on both sides.

Third and high gear: When centered between gears to have .100-.110 in. clearance on both sides.

Sliding reverse gear: When centered between gears to have approximately .060.070 in. clearance between gear teeth.

Where shifter clutch engagement is with dogs protruding from face of gear, turn gear so dogs on shifter clutch and dogs on gear are overlapping each other about 1/8 in. before checking clearance.

When clearances are not equal and correct, shifting fork assemblies must be corrected by increasing or decreasing the number of shims between shifter fork and shifter finger. To make this adjustment, remove shifter fork assemblies from transmission. Shims are available .007 in. and .014 in. thick.

After taking out or adding shims, be sure fork assembly locknut is tight. However, excessive tightening may close up hole in bushing so it is no longer a free, sliding fit on shaft.

Figure 4-17. Checking Shifter Clutch Clearance

Install shifter shaft lock screw or lock ring.

Assemble shifter cover to gear box as described in "Replacing Shifter Cover."

GEAR BOX (FOUR SPEED)

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