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Old 04-06-2012, 10:49 AM   #1
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Question Yj driveline vibration help

I have a 92 yj 4.0 5 speed 4in RC lift. And i have vibration when only i get on the gas. and when i start out in first gear the transmission shakes back and forth then quits. It has a crossmember drop looks to be about an inch. but my trasfercase sits on my crossmember. Im out of ideas and need help/opinions/ideas. Thanks guys

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Old 04-06-2012, 12:07 PM   #2
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Check all u joints and tranny mount. Most likely one or the other.

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Old 04-06-2012, 07:41 PM   #3
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looks like a bad trans mount.
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Old 04-06-2012, 09:28 PM   #4
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Your slip yoke is leaking and throwing fluid on the muffler in the pic. That is an indication that you are putting pressure on that seal. Which means you are putting pressure on the shaft in the T case causing your vibrations. With a 4" lift you need a SYE and a CV drive shaft. I had vibrations until I bought mine and put it in. CJ Tatton is on Ebay and has a store. He sells a combo kit for $460 with shipping. It is easy to do and eliminates your vibrations. Plus the SYE won't leave you stranded in the middle of nowhere. Hope this helps.
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Old 04-06-2012, 09:42 PM   #5
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That SYE and Tatton drive shaft also fixed my transmission problem also. Mine would do the same thing when starting out. I also have a 4" RC lift. The SYE is from Teraflex and he custom makes the driveshaft. You would be happy with that combo he sells. Your drive train is maxed out in the rear and the causing both your issues.
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Old 04-11-2012, 06:12 PM   #6
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That makes sence thanks guys!
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Old 04-11-2012, 06:38 PM   #7
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Quote:
Originally Posted by Rambo450r View Post
That makes sence thanks guys!
Not sure which one you are referring to making sense but changing your mounts or u joints won't fix your problems you will have to do the SYE and CV driveshaft since you are running a 4" lift and haven't done that yet. You could have multiple problems but I doubt it. It is not hard to inspect your u joints take off the bolts and check the bearings. I wouldn't remove the caps that go into the driveshaft for inspection unless there is a problem. As far as a bad trans mount I don't see anything in the pics that looks off but you can easily check the mounting bracket with the removal of a few bolts. Hope this helps.

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