30 TRANSMISSION—OVERDRIVE
FIGURE 18—Inspection of Overdrive Parts is
Important. The Free Wheeling Rollers Will
Slip if these Parts Are Worn
Test the action of the two cam retaining springs. These
springs are designed to twist the cam in a clockwise direc-
tion, thus holding the rollers up on the cam. If this spring
action is slow or retarded, it will result in a loud thump
whenever the free wheeling unit engages on acceleration.
To test it, grasp the cam roller retainer and turn it counter-
clockwise. Then release it suddenly. If the retainer springs
quickly back in a clockwise direction, the springs are all
right. If the action is sluggish, replace the springs (Fig. 19).
Transmission Cover and Shift Fork Assembly
To remove the transmission cover and shift fork assembly,
simply remove the nine attaching cap screws and slide the
assembly including the shift forks away from the transmis-
sion case. Remove the gasket and discard.
FIGURE 19—When You Twist the Cam Roller
Retainer Counter-clockwise, the Two Springs
Should Snap it Back Quickly
Interlock Sleeve End Clearance
Place one shift shaft in gear and with the other in the neu-
tral position measure the clearance between the interlock
sleeve and cam of the shift shaft at the in-gear side (Fig.
20).
FIGURE 20—Measuring Interlock Sleeve
End Clearance
This clearance should be maintained at .002" to .008".
Four different length sleeves are serviced in .005" varia-
tions.
Disassembly of the cover and shift fork assembly
FIGURE 17—Measuring Balk Ring Tension
with Spring Scale-3-1/2# to 5-1/2# Pull
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