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Old 10-24-2013, 12:35 PM   #1
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Problem after regear

I helped change the gears in a friends jeep to 4.88. His jeep came with 4.10/4.11 and the front shaft in the back. We also changed ball joints, u-joints' wheel bearing' tie rod, and a few other little things.

When we set the gears we followed some very good instructions link to me on here. I feel as if we set everything to spec.

The jeep when going into gear engages rather harsh. It will pop and clank when moving. When turning it feels like its in 4wd (grabbing).


Marc drove the jeep with the front shaft in (and in 4hi) before i told him he had different gears. The jeep sems to make a noise from under the seat but his jeep it to loud to really understand anything.



I think his transfer case is slipping but dont know how to tell.

ANY ideas?

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Old 10-25-2013, 03:08 AM   #2
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This may sounds like a stupid question, did you swap gears in both diffs? Sounds like a binding issue.

Are both diffs currently rocking the same ration?

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Old 10-25-2013, 07:12 AM   #3
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Yes! When he bought the jeep it had 4.10 & 4.11. We went to 4.88.


Pulled front drive shaft and problems 95% gone.
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Old 10-25-2013, 11:19 AM   #4
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Quote:
Originally Posted by mikemounlio View Post
Marc drove the jeep with the front shaft in (and in 4hi) before i told him he had different gears. The jeep sems to make a noise from under the seat but his jeep it to loud to really understand anything.
Did he have the rear shaft in at the same time too? If so, there is a good possibility your t-case might be screwed.
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Old 10-25-2013, 11:41 AM   #5
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Yes he had both shafts in. I do think its his tcase. I am going back tonight to listen again. This time i will have him drive and i will walk next to it.


Really the gear change feels good. When u let off or get on it it feels smooth until the clunk. After thinking back to my bad chain on the old gokart it feels just like that.


Gonna lift it up and check to see if 4wd is shifting in and out like it should.
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Old 10-25-2013, 11:47 AM   #6
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A 4:10/4:11 gear ratio won't hurt anything, that is the factory setup from the factory!
Was the jeep driving ok before you changed gears? If so then I'd look for something in the setup of the new gears.
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Old 10-25-2013, 11:54 AM   #7
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A 4:10/4:11 gear ratio won't hurt anything, that is the factory setup from the factory!
my interpretation is the one axle setup at 4:88 and the other axle set up at 4:10.

OP...were the axle gear ratios different when he drive it in 4hi or the same? If they were different I would lean towards the transfer case. If they were the same, then I would look at your gear set up.
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Old 10-25-2013, 11:59 AM   #8
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also you said you replaced the u joints... on the drive shaft or on the axle shafts? Did you check both?
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Old 10-25-2013, 12:44 PM   #9
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Um, yeah, this sounds like a fail. If you were in 4 hi with 4.10's up front and 4.88's out back on pavement, Im sure there could be some damage in the Tcase.........might be a good idea next time to keep it in 2wd till both gear sets are done.

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