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Old 04-25-16, 09:29AM   #31
JSPONT
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how long is the yolk, they made short one and long ones. If you push you driveshaft in to the back of the tranny all the way and mount it in the pinion yolk it should pull back about 1 inch into the pinion yolk.
The problem is if you are to far out to start and you drive the car the travel of the rear can pull it out further. You don't want to drop a drive shaft from the front, bad stuff can happen then.
They way to measure the drive shaft is to have the car "loaded" as it would sit on the ground, measure from the output shaft to the front of the pinion yolk. The drive shaft shop can figure from there. They will usually make it about an inch short from that measurement.
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Old 04-25-16, 03:30PM   #32
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Here's. Fool poof way of measuring for correct drive shaft length. Take a yolk and stick it into the trans as far as it will go in...then pull it out 1" take a measurement from center to the center to were it goes in to the rear end.

This allows you to push drive shaft in to trans and then pull it back to bolt it to tear end. Doesn't matter if car is on jack stands or not. I think that's what your asking.
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Old 04-25-16, 03:45PM   #33
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Just make sure the yoke your using is same length as the one that's on your drive shaft. Once you pull the yoke out 1" then it's easy to get your measurements. Then all you have to do is butt your tape measure up to were drive shaft makes in ( U- joint because that's the center ) then measure to the center of the yoke U-joint.
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Old 04-25-16, 03:55PM   #34
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You want to put that jack stands under rear end Axel tubs... Jack it up from there, not on the frame of the car. This simulates car being on the ground. The front of the car can be on Jack stands.

If you have Jack stands on the rear frame, just take your Jack and place it under the rear and Jack it up until it just starts to come off the stands.
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