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Old 10-18-2006, 09:04 PM   #1 (permalink)
 
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YJ TF 999 expert help needed

Hello all, I have a YJ 4.0L , 35"Procomp, Dana 35 and 30 and my tranny is giving me trouble. When I accellerate there is a vibration coming from it until speed goes higher the vibration goes away and it shift in 2nd. Also sometimes when it needs to go from 3rd to 2nd it does that vibration again until it downshift to 2nd. I have 4" suspension lift with a CV driveshaft and a Slip yoke eliminator so this vibration does not come from the drive shaft. Anyone could help ?
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Old 10-19-2006, 02:03 PM   #2 (permalink)
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Have you checked your u-joints yet? Did the problem appear out of 'nowhere'; or did it show up after you made a certain change?
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Old 10-19-2006, 09:50 PM   #3 (permalink)
 
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Since I made my modif it started slowly and getting bigger. Within 3 month it went from not noticeable to very very noticeable. The weirdest thing is that today it was not doing it at all... My U-joint look fine. The vibration really comme from the tranny. Also when I shift the 4x4 it is almost dissapearing.

Last edited by Tristan83; 10-19-2006 at 09:52 PM.
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Old 10-20-2006, 10:44 AM   #4 (permalink)
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check by chance that when the slip yoke elminator was put it that it was installed right
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Old 10-20-2006, 10:53 AM   #5 (permalink)
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This happened to me too, I thought my u-joints were f9ine but everything lead to those, so I took them out and sure enough, those little needle bearings were without enough greese for so long they crumbled into dust from the heat.

just a thought.
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Old 10-20-2006, 08:10 PM   #6 (permalink)
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check it out.

Check your tranny and motor mounts.

I got some vibes when my tranny mount went out.
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Old 10-20-2006, 08:51 PM   #7 (permalink)
 
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Brand new motor mount and brand new tranny mount
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