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1986 Alpha One Question

fastjeff

fastjeff

Gold Medal Contributor
Got the plastic water pump housing out to replace the seals. There is a LOT of side motion in the driveshaft--a lot! Is this normal?

Thanks,

Jeff
 
When the drive is running/spinning the effect on the pinion gear (attached to the drive shaft) interacting with forward and reverse gears forces the shaft upwards.

When setting pinion height/gear lash you use a valve spring and a lock collar on the drive shaft and use the spring pressure to put upward force on the shaft the check gear lash

In the pic attached visualize pushing down on the spring and nut with the set screw and then tightening the set screw. the spring pressure will force the shaft UP.
 
Mine looks a lot different; there's a weird looking nut with "OFF" and an arrow cast into it. The nut has 4 openings in it with the bearing visible below.

Jeff
 
That is not weird looking that is the retaining nut that holds the outer bearing race in place. the shims used to set pinion hieght are under the bearing race and the nut gets torqued down to spec.

When you pull up on the shaft the bearing that is pressed onto the shaft seats into the bearing race. The bearing looks similar to a rotor bearing on a typical GM front rotor. inner and outer bearing with the outer race pressed into rotor housing

Pic attached
 
Got it. Thanks for putting my mind at ease. I did pull up on the shaft, as you said, and the bearing centered nicely.

Jeff
 
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