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1981 What tail shaft do I need 350 turbo trans.

I have a 350 turbo trans what tail shaft do I need to convert from 4x4 to 2 wheel drive and do way with mp208 transfercase

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You need to measure the shaft length with the transmission slip yoke installed in the transmission, get it in the position you want to have it at where its connecting to the differential/hogshead as close as possible. Now measure from the center line of the universal bearing on the back of the transmission yoke to where it will connect to the hogshead universal bearing. You need to be really close with this measurement and probably no more than 1/4" (6-7mm) off and just a bit short is better than to long because the transmission yoke can only slide in or out so much before you change the geometry of the alignment and start causing excessive wear and damage plus vibration (like you think its going to fly apart vibration which it is! so get the measurement right) Now you got lucky because I work in a drive-shaft shop right now and I've done a couple hundred of these in the past year for everything from dump-trucks to electric golf carts and 4-wheelers. You didn't mention if it was a 2 piece drive-shaft with a center bearing but with it being 4wd it probably has one plus a squirrel cage idk but you've got little room for error on those especially if it needs rebuilt, it should not sit flat or straight out but kinda bent at an angle because that's how it runs most of the time. So if it doesn't and just kinda flops around it needs rebuilt with new universals and pivot bearing/post possibly. OK so when you get that measurement take it to the drive-shaft shop and have them either cut yours down to length or extend (I dont recommend that, the shaft will have to be rebalanced because it will vibrate and that is an extra charge) the length or make a new one. Go with double-strength tubing and always use new yokes and universals. Good luck

Posted on May 25, 2015


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