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Unread 04-19-2013, 12:36 PM   #1
CJ781
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1981 CJ7 
 
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Putting in thicker front driveline

I had to rebuild my front driveline. I asked a machine shop if he could make a bigger one for me. He said in his experience that for a larger diameter shaft on a suspension lift of 4in on the CJ7 that the larger shaft is going to hit the cross member at full flex. He said I could put in a dual yoke to fix the problem but they tend to wear out faster. Any thoughts suggestions?
1981 CJ7 with a 4in Rough Country lift

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Unread 04-19-2013, 01:08 PM   #2
Renegade82
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It will be close as it is with a 4" lift so he's got a point. Don't beef up the u-joints though, you want them to be the weak link in any drivetrain. They are the easiest and cheapest to fix, should things be over stressed. And the 30 isn't a brute to begin with.
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Unread 04-19-2013, 01:12 PM   #3
CSP
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How big of a diameter are you wanting to go to?
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Unread 04-19-2013, 01:25 PM   #4
jeepwhore
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I had a stock rear shaft retubed for my front. Had to notch the skid plate a little but it fit.
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Unread 04-19-2013, 01:27 PM   #5
agear
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Yep, a lot of people just cut a notch in the skid plate
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Unread 04-19-2013, 02:02 PM   #6
BeatCJ
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I also have a re-tubed rear driveline in the front. I have a relatively short transmission (T-177), and have 1/2" clearance at full droop, 2 1/2" lift, though. All sorts of factors make a difference, motor mounts, transmission mount are all new on mine.
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Unread 04-19-2013, 11:19 PM   #7
CJ781
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Good to know. Not planning on much larger. Have to research it a touch more. Thx for the 411
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