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Unread 11-20-2012, 05:30 PM   #1
csalev3
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1997 TJ Wrangler 
 
Join Date: Apr 2012
Location: Portland, Maine
Posts: 162
mystery front shaft vibes...

Okay, I've been searching for hours with no conclusions... sorry if this is somewhere else that I haven't seen.....


With that being said.. I did a frame swap over the summer, it took 5 months between working full time and waiting for new parts... during this time, I had my front drive shaft laying outside under cover. (not exposed to direct rainfall)

I've only been driving the TJ with the rear driveshaft until 3 days ago. Since it's getting colder out with a bigger chance of snow soon, I decided to put the front shaft back in. Noticed it was making a lot of noise for the first few hours. Inspected and noticed that it was all the way bolted up to the yoke so I tightened the bolts even tighter... I can barely move them now, 1 because they're so tight, 2 because they're wicked hard to reach...

My question, would the driveshaft sitting for so long without being used ruin ujoints or the double cardan joint? OR is there some reason the shaft would completely seat against the yoke?

I feel stupid asking, but it just doesn't seem like it's on all the way and tight enough because it vibes like crazy on the highway... the vibes fluctuate, mostly around 60 mph and up. vibes for 3 seconds, goes away for 3, vibes for 3, goes away 3, etc... it's weird... nothing like the vibes I had in the rear before the sye....


any tips? Thanks!

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1997 TJ, NEW FRAME, 4.0, 5 spd, d30, d35 aussie locked, np231 RR sye, tom woods driveshaft, 4" RC n20 lift, adjustable upper rear c/a, 33x10.5x15 BFG KM2s
1945 Willys MB, all original right down to the tires, 30k miles, 250 miles on rebuilt L134 engine. + 1946 Willys CJ-2a, barn fresh, new 6.50x16 NDTs, 15k miles
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Unread 11-20-2012, 05:41 PM   #2
Unlimited04
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2004 LJ Wrangler 
 
Join Date: Dec 2005
Location: Colorado
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have the shaft rebalanced.
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Unread 11-20-2012, 07:58 PM   #3
csalev3
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1997 TJ Wrangler 
 
Join Date: Apr 2012
Location: Portland, Maine
Posts: 162
The shaft was fine before I started the frame swap... literally took it off for 5 months, then put it back on... how would it become unbalanced? never dropped it or caused any sort of damage. wrapped the u-joints in tape so they wouldn't come undone.
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1997 TJ, NEW FRAME, 4.0, 5 spd, d30, d35 aussie locked, np231 RR sye, tom woods driveshaft, 4" RC n20 lift, adjustable upper rear c/a, 33x10.5x15 BFG KM2s
1945 Willys MB, all original right down to the tires, 30k miles, 250 miles on rebuilt L134 engine. + 1946 Willys CJ-2a, barn fresh, new 6.50x16 NDTs, 15k miles
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