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Old 04-01-2013, 08:10 AM   #1
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Driveline Vibration -- How Obvious?

2000 TJ
5spd
4.0L
31" on stock Canyons

Finally have my OME shocks and coils (2") installed. Everything looks great and drives even better (listen to Dirk when he suggests the sport shocks).

Had my rig at the Jeep place to get the oil changed; before you blast me for doing that, I had a coupon for 4 oil changes for $40, and that's with the large capacity Mopar filter...

...while I'm there, one of their guys came out and told me that it wasn't a pressing issue, but he thinks my driveshaft angle is off and that I should think about a TC drop. He's not trying to sell me anything, AND I know I was at the stealership, but that made me a little paranoid about things down the road. Kind of like if someone says "are you itchy?" and then you start scratching.

I put about 200 miles on him this weekend including a few runs up to 80mph and don't feel a thing. Nothing through the seat or the stick. Long story short, would I definitely notice the dreaded "driveline vibes" or is it something you would have to have experienced before? Similarly, is the driveline vibe the only warning sign or is the angle also something to watch out for? I don't want to be chewing up my rear end/driveshaft without knowing it.

Thanks all...and before and afters to be posted soon...

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Old 04-01-2013, 10:44 AM   #2
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If you can't feel it, I wouldn't worry about it honestly. I mean, obviously your driveline angle will be off a little bit because you lifted your jeep 2.5" higher than it was stock... So yes it will be a little off of what it was stock, but usually 2.5" isn't enough to need any correction. I have the same lift (Dirk is amazing right?! haha) and I have some driveline vibes. But I got the heavy duty springs from him to support my spare and a rear tire carrier but I haven't put the rear tire carrier on yet so that'll weigh it down a bit. I'm waiting to do that before I fix it the expensive way.

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Old 04-01-2013, 10:57 AM   #3
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At that lift height - You should be fine, especially if you are not feeling any vibes post-lift.

IIRC, most articles I've read suggest changing the pinion angle if you are lifting 3" or more on a TJ, and more than 4" on an LJ.

My .02
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Old 04-01-2013, 12:14 PM   #4
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That's along the lines of what I was thinking -- just needed a little reassurance that things were fine. Doesn't matter what you search on in this forum, it appears to be nearly unanimous about ~2" causing no issues.
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