Bad Vibration. Please Help? - JeepForum.com
 
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post #1 of 9 Old 01-30-2008, 08:48 AM Thread Starter
metal_kid17
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Bad Vibration. Please Help?

So I put in my SYE and CV driveshaft and everything was nice. It all went back together nicely and what not. I figured while I had it all out I would go ahead and change all the U-Joints and everything as well. Well, when I finally got it all back together I took it for a drive. No more vibration taking off but in high 2nd gear to 4th gear I have a bad vibration and I'm completely puzzled. Really the only thing that I could think of is that the driveshaft isn't balanced right but I don't know. If anyone has any suggestions I would be willing to try anything! THANK YOU!!!


91 YJ, 2.5L, 4'' RE Lift, SYE and CV driveshaft, 33x12.50 Super Swamper TSL Radials
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post #2 of 9 Old 01-30-2008, 12:06 PM
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Was this a new CV driveshaft? If so, it is probably not out of balance.

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post #3 of 9 Old 01-31-2008, 05:09 AM
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Did you shim the axle to re-align for the SYE?
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post #4 of 9 Old 01-31-2008, 06:36 AM
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Shims are usually required. I had to use 8* shims in my axle to rotate the pinion up to point it at the yoke of the t-case.

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post #5 of 9 Old 01-31-2008, 07:37 AM
crb577
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you most likely need to shim the pinion up towards the SYE I had the same thing but i cut and rewelded perches for my 8.8 anyway

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post #6 of 9 Old 01-31-2008, 09:50 PM Thread Starter
metal_kid17
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its got 4* shims in it from when i installed the lift... im guessing thats not enough then? where can I get the shims?

91 YJ, 2.5L, 4'' RE Lift, SYE and CV driveshaft, 33x12.50 Super Swamper TSL Radials
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post #7 of 9 Old 10-26-2009, 01:32 PM
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/l,[___],
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thats freakin awesome

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post #8 of 9 Old 10-26-2009, 01:59 PM
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This great picture is from rusty when I had vibration questions.




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post #9 of 9 Old 10-26-2009, 02:52 PM
lonepunker
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mine is already set p that way, and it still vibrates in 2wd.
however, when i shift into 4wd high it greatly reduces the vibration.
it starts in 3rd gear at around 1500rpm and it mellows out(but not comletley) around 2000rpm. does the same all the way thru 5th gear.
any thoughts?

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