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Unread 07-28-2011, 05:37 PM   #1
jackedzj
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full time four tire question

so i know with the full time four zjs you cant have two types of tires it will blow the vc but i measured today from normal wear my tires differ by a 1/8 of an inch i just bought 4 bfg ats 33 two a brand new 1/2 in tread two are 1/4 how bad would that end and if i drop the front drive shaft will it cause any damage over time

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Unread 07-28-2011, 07:06 PM   #2
FPKites
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If you had a 96-98, I'd say pull the front shaft. Since you have a 94, I'd highly recommend not doing that. 93-95 249s don't do well with the front shaft removed (rolls in park).

There's a good chance that having 1/4" difference between front and rear will heat up your viscous coupler, but some have had good luck.

Food for thought.
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Unread 07-28-2011, 08:07 PM   #3
ratmonkey
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1/4" tread vs 1/2" tread is a half in diameter difference. it'll eat the vc quickly. max difference is 3/8" diameter and even then it won't be happy about it.
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Unread 07-28-2011, 08:24 PM   #4
iGotTheRunz
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Quote:
Originally Posted by FPKites View Post
If you had a 96-98, I'd say pull the front shaft. Since you have a 94, I'd highly recommend not doing that. 93-95 249s don't do well with the front shaft removed (rolls in park).

There's a good chance that having 1/4" difference between front and rear will heat up your viscous coupler, but some have had good luck.

Food for thought.
You can pull the shaft without safety issues on a 1998? Could a shaft be the cause of some humming noise during acceleration?
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Unread 07-28-2011, 09:41 PM   #5
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A little off topic there

Yes, a 96-98 NP249 can run without a front driveshaft with minimal wear.

The front driveshaft generally has 3 u-joints or 2 u-joints and a CV joint. Either combo can cause a hum, clank, etc when they get worn.
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Unread 07-28-2011, 10:38 PM   #6
rlcii77
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I've had my front shaft in & out & it'll be going back in in a couple weeks without incident, except, rolling on unlevel ground. I carry a chock block with me now.
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Unread 07-28-2011, 11:36 PM   #7
sandman
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just swap out the TC for a 231, thats cheaper than new tires.
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Unread 07-28-2011, 11:55 PM   #8
jackedzj
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Must agree with sandman that's my plan in the near future but the tires I bought brand new that are on the jeep it turns out that the super small difference is cause my phantom highway heat and pissing off the vc bad so I'm going to just find two more new bfg ats and stick with that route I do deliverys a lot and rolling isn't a good thing so the driveshaft drop is a no
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