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Old 03-08-2012, 10:46 AM   #1
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Is it necessary to drop the TC with a 3.5" SSL

Is it really necessary to install the TC spacers after putting in my RC 3.5" suspension lift? This is all I lack before having it all done. I drove it last night around the neighborhood and didn't notice any vibes or anything out of the ordinary?

Thanks for your time and input...

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Old 03-08-2012, 10:47 AM   #2
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If you're not having problems then I would say to leave it out.

Also, have you taken it up to highway speeds yet to see if vibrations kick in there?

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Old 03-08-2012, 10:50 AM   #3
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You installed a 3.5" suspension lift and there are no drivetrain vibrations? None at all? For a Wrangler TJ, that would be extremely surprising.

Do you by any chance drive a Wrangler Unlimited?
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Old 03-08-2012, 10:57 AM   #4
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I got vibes with my short 2" suspension lift.
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Old 03-08-2012, 11:04 AM   #5
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Quote:
Originally Posted by nastyrider17 View Post
If you're not having problems then I would say to leave it out.

Also, have you taken it up to highway speeds yet to see if vibrations kick in there?
I could only get up to 45-50 MPH last night rolling around my neighborhood... I would have liked to get it out on the interstate / highway, but it was late last night - and it's raining today. I may hold off installing it until I can...

Quote:
Originally Posted by Jerry Bransford View Post
You installed a 3.5" suspension lift and there are no drivetrain vibrations? None at all? For a Wrangler TJ, that would be extremely surprising.

Do you by any chance drive a Wrangler Unlimited?
Nope - its just a TJ sport

What I was really concerned about is no knowing if the spacers were a "must install" thing to protect U-Joints or something??
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Old 03-08-2012, 11:08 AM   #6
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That tall of a lift on a short wheelbase Wrangler TJ should indeed be causing drivetrain vibrations from excessive angles at the u-joints on the rear driveshaft. Those vibes, if they are allowed to continue, will eventually start taking out things like the driveshaft u-joints, seals, and/or bearings.

Those are the types of vibrations that cannot be ignored. And with 3.5" of lift, I would expect some pretty good vibes in the absense of either a t-case drop or SYE kit and CV drivshaft.
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Old 03-09-2012, 08:52 AM   #7
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I got the vibes on my 3" lift. Slight vibes from 32-35mph and then they are gone. I am going to add 1 a washer to the existing TC drop and see if that fixes it. If not, I am going to do the SYE deal.
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Old 03-09-2012, 10:05 AM   #8
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I got the vibes on my 3" lift. Slight vibes from 32-35mph and then they are gone. I am going to add 1 a washer to the existing TC drop and see if that fixes it. If not, I am going to do the SYE deal.
Thanks Siafu.... I'm going to drive it this afternoon (now that the Monsoon is past) and see if I have any vibes at all?
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Old 03-09-2012, 10:57 AM   #9
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With that amount of lift I would install them regardless of vibes or not. The vibrations are not the problem, the horrible shaft angle is the problem. Best fix would be a SYE and CV shaft but the TC spacers are a good temporary solution (coming form a guy who has them for 2 years lol).
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Old 03-09-2012, 11:11 AM   #10
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Mine was vibrating with only 3" lift. If you don't want to do the tc drop then you would have to install a mml and bl.

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