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Unread 11-05-2012, 12:12 PM   #1
honda11
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1995 YJ Wrangler 
 
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vibration

In my 95 yj i am getting a pretty good vibration at 30 mph to about 40 mph it stops after that i am stumped on what this could be wheels are balanced

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Unread 11-05-2012, 12:21 PM   #2
Wranglin4Life
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did this just start randomly? did you recently install and aftermarket or oem parts?
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Unread 11-05-2012, 12:27 PM   #3
honda11
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Yes used oem parts and it did start kinda randomly i think it may be my driveshaft angle but not sure
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Unread 11-05-2012, 04:44 PM   #4
G30SFF250
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You must give more info to get an answer.

Have you done anything (and if so, what) to the drivetrain, suspension, driveline angles, etc?
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Unread 11-05-2012, 06:22 PM   #5
honda11
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It has had a 4" lift on it for a year now nothing but replaceing the transmission mount on skid plate has been touched and it helped alot but still have the vibration at 40 to 50 mph
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Unread 11-05-2012, 07:19 PM   #6
TrentYJ
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Quote:
Originally Posted by honda11 View Post
It has had a 4" lift on it for a year now nothing but replaceing the transmission mount on skid plate has been touched and it helped alot but still have the vibration at 40 to 50 mph
Does this happen at low rpms? If so, It's probably drive-line related. actually, it's probably drive-line related anyway. If, it can happen at higher rpms also then it may be steering related but you'll have to provide a bit more info.
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Unread 11-05-2012, 07:31 PM   #7
honda11
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Rpms dont seem to affect it really just like i said at that speed its real rough after that it smooths out
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Unread 11-05-2012, 08:58 PM   #8
TrentYJ
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Quote:
Originally Posted by honda11 View Post
Rpms dont seem to affect it really just like i said at that speed its real rough after that it smooths out
Well the reason I ask is after I installed my 4" lift I got some pretty bad driveline vibes at a particular speed but the effect was worse at lower rpms. So, it could very well be your pinion angle. However, it is not uncommon to have loose steering components causing some noticeable vibration at particular speeds. Its really hard to tell unless your driving the vehicle but that may narrow it down some. By the way do you have an sye/transfer case drop installed? that would obviously eliminate the first option.
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Unread 11-05-2012, 09:17 PM   #9
TrentYJ
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OK after carefully re-reading these posts, I'm about 90% sure its the pinion angle. I remember after reaching a certain speed I would "get out" of the vibration zone. Also you would feel the vibrations near the rear of the jeep. I only reserve the 10% bc it seems as though the vibrations just started although you've had a lifted suspension for over a year which seems strange. Vibrations and frictional wear are THE causes of mechanical failure so, the fact that your just experiencing vibrations means something is about to go. Whether it be a pinion seal or something catastrophically fails, your driveline components are most likely under too much stress. Next time you get a chance, see if your loosing any fluid at the t-case or pinion seal as that will probably be wearing out first. Next, I would correct it with a t-case drop (easy to home-make) or an SYE adapter kit.
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Unread 11-05-2012, 09:24 PM   #10
turpehar
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I would be suspect of a rear shaft U joint. If the lift was installed one year ago and the vibes just now shows itself, good chance it's a joint.
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Unread 11-05-2012, 10:16 PM   #11
honda11
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Thanks for the replies i plan on dropping my trans a half inch and replaceing my u joint as well
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Unread 11-05-2012, 10:46 PM   #12
sdotcarter
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Replace your u joints and then take a test drive. Problem still there THEN spend the money on a tcase drop.
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Unread 11-05-2012, 10:51 PM   #13
honda11
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I already made one just gona make anouther with a bit more drop
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