vibration after gear change -
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post #1 of 4 Old 05-19-2012, 03:44 PM Thread Starter
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1998 TJ Wrangler 
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Location: clinton,tn
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vibration after gear change

i had 488 gears put in last week. i picked it up thursday night and when i drove it home i could feel a vibration in the drive line. i called him friday morning and told him and he said to drive it i checked it out and with the back jacked up, i can spin the rear wheels by hand and feel the gears meshing together and i know this is what i am feeling as the jeep rolls slowly down the street. i am going back monday after work to let the man drive it again. he said today that he didn't feel any vibration when he drove it. i think the side to side play is to tight. i had no vibration before the gear change. what is the opinion from my readers of this. thanks

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post #2 of 4 Old 05-20-2012, 01:12 AM
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Did he use a master install kit and replace all the bearings?

Horsepower is like a hot girl with STDs. You know you want to hit it but you're afraid of the consequences.
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post #3 of 4 Old 05-20-2012, 06:53 AM Thread Starter
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1998 TJ Wrangler 
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Location: clinton,tn
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sorry, i should have listed all he did. new master install kits, new spider gears and new axles. he used superior gears and alloy axles. all bearings and seals are new. i checked the u-joints and they are good.
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post #4 of 4 Old 05-23-2012, 02:15 AM
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Didn't do anything to change the pinion angle or ride height too, did they?
Just checking, in case there were other changes.

But by the sound of it, you've got it pegged. You should not be able to feel the "cogging" of the teeth as they mesh. Should be seamless and smooth. Like buttah...
A bad bearing can give you that chunky feeling too. And yes, it's possible to have a bad one right out of the box. It's probably extremely rare, but anything's possible.

Good luck.

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