TJ: Installed 2.5" RC Lift, Slight Drive line Vibrations, Fix? - Great Lakes 4x4. The largest offroad forum in the Midwest

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Old September 30th, 2012, 12:29 AM   #1
Catnip 0_o
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Default Installed 2.5" RC Lift, Slight Drive line Vibrations, Fix?

Last weekend I installed a 2.5" Rough Country lift on my jeep that included shocks, coil springs, sway bar quick disconnects, adj. front/rear track bars and .75" front coil spring spacers making the front sit slightly higher then the rear since I have a heavy bumper and winch in the front. Ever since I installed it I have been having slight driveline vibration. I took it to a offroad shop and had it perfectly aligned, but of course the driveline vibration persists. Although not all that bad, I feel it isnt healthy. Rough Country did not supply a T-Case drop when I bought the lift, should I install one to fix my driveline vibration issue? If so, what would be a good lowering kit to go with for a 2.5" Lift? (3.25" Front/2.5" rear)

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Old September 30th, 2012, 06:55 AM   #2
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Most TJ kits I do have a t-case lowering kit with it. It's usually 1" and has a bracket with it to drop the body side of the t-case shifter pivot so the shifter won't bind.

Can either drop the case or put a SYE kit in it and get a new rear driveshaft made.
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Old September 30th, 2012, 08:51 AM   #3
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You could try a few washers on the bolts to lower the t-case.
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Old September 30th, 2012, 08:55 AM   #4
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My rc 2.5 spring kit came with a t-case lowering kit,Im suprized yours didnt.You can buy a kit to drop it,check rc first to make sure your lift isnt supposed to come with one.
It's not cheap,but a sye and rear cv driveshaft is the way to go.If you lower the t-case it becomes a big shovel,and you will be hung up on it often.It also looks like shit hanging down.I ran a lowered t-case for a year and hated it the whole time.
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Old September 30th, 2012, 10:01 AM   #5
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you could try a motor mount lift. it can help with slight driveline vibrations sometimes.
by raising the engine it points the rear of the transfercase down. that helps the rear driveshaft angle.

if you do need to lower the tcase, grab a bunch of big washers. only ad as many as you need to get rid of the vibes.

a sye and cv driveshaft are the real fix for your problem. look into them in the future.
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Old September 30th, 2012, 10:14 AM   #6
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I second the motor mount lift
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