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Unread 04-30-2013, 06:17 AM   #1
Adam86
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249, VC and bunny hop. Why?

Why does the transfer case cause this?

If the t/c is just sending power to the axle and its the axles job to allow the wheels to rotate at different speeds why is it the t/c that causes the wheels to skip whilst turning?

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Unread 04-30-2013, 07:14 AM   #2
Timo_90xj
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Axles only split power between each side. Transfer case splits the power between front and rear. If the wheelhop happens in AWD mode, it means your viscous coupling is shot and needs to be replaced.

If the wheelhop happens in 4lo, it is normal behavior because in 4lo front and rear axles are locked together providing you with maximum traction.
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Unread 04-30-2013, 08:07 AM   #3
Adam86
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Ok so im getting wheel hop whilst turning is that down to the axle because they split power from side to side?

If you get wheel hop in a strait line its the transfer case?
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Unread 04-30-2013, 08:12 AM   #4
Snowfan2
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If you get wheel hop in a straight line something is seriously wrong. When turning, the front tires follow a longer path than the rears, that is what causes the binding when they are locked together as with a blown VC.
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Unread 04-30-2013, 08:43 AM   #5
Adam86
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Quote:
Originally Posted by Snowfan2 View Post
When turning, the front tires follow a longer path than the rears, that is what causes the binding when they are locked together as with a blown VC.
Perfect, that's the reasoning answer I was looking for!

Didn't know the vc locked when in low on the 4.0. Nice info cheers.

I just get a bit of hop whilest turning was just using strait line as an example lol.

Cheers all!
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Unread 04-30-2013, 09:01 AM   #6
Timo_90xj
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Quote:
Originally Posted by Adam86 View Post
Ok so im getting wheel hop whilst turning is that down to the axle because they split power from side to side?
No, like I just wrote you get wheelhop because of a failed VC.

Quote:
If you get wheel hop in a strait line its the transfer case?
You would only get wheelhop or binding driving in a staright line if you had different gear ratios in front & rear axles. There is no wheelspeed differences to account for when driving straight.
__________________
1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...

http://www.jeepforum.com/forum/f13/d...s-etc-1222317/


1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

***Under construction***
1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
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