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Rear Driveshaft Slip Travel

nvrenuf

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New question of the day -

How much travel do y'all typically set up in a rear shaft slip yoke assembly?
 
Mine is a Tom Woods rear shaft, and I have their standard rear slip which is 3 inches
 
Ok. I'm not quite 2" now so I may have to make an adjustment. On paper it all sounded good but bolt it in and things were different. :doah:
 
Just to be clear, you guys have 3" of male slip shaft exposed so you could compress the shaft that much from it's riding position. Not 3" of total in & out travel (1.5" each way).
 
That sounds good. I've got about 1.75" of exposed slip shaft, I was worried this was too little and might bottom out.
 
I know that on mine with shackle flip, my rear slip (at the tcase) only uses maybe a half inch of slip through travel.

My front however uses about 5" or more. I'm betting jeeps with front shackles use very little front slip as it would act like my rear slip.
 
That's good to know. I figured the rear wouldn't move much but I didn't realize how little.

Thanks guys!
 
I know that on mine with shackle flip, my rear slip (at the tcase) only uses maybe a half inch of slip through travel.


yeah, that is about how much my rear moves too. If you think about it, with a rear axle having the pinion in the center of the axle, during articulation, the distance between the tcase output and the pinion yoke does not change much at all. Really the only time this distance changes is when the whole axle moves either closer or farther away fromt the body of the truck (say when when you drive down a bumpy road and the whole axle just keeps bouncing up and down).

However in the case of a front axle with an offset diff, and like Deuling said, with shackles, the pinion yoke travels a much larger distance during articulation.

This might have been a really stupid ramble that doesn't make sense at all....so sorry :D
 
Well one huge reason the front uses more is the differential is offset to one side much more than the rear axle. Either side of a rear axle that comes up, the yolk for the most part doesnt change position, both springs have to extend or compress to get a measurable change out of a rear end, now the front end on the other hand being offset, if either spring compresses or extends, the yolk is moving a bit more.
 
The diff being centered helps also as the axle droops the shackle angle decreases moving the axle closer to the transfer case. I have had some trucks that had pretty dang good travel in the rear and never a problem. My old blazer used about 2" of total slip.
 
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