Shaking over 80mph
Thread Starter
Launching!
Joined: Sep 2004
Posts: 246
Likes: 0
Shaking over 80mph Recently I got my car all back together, have done a lot to it, and now at 80mph+ i get a bad vibration, not rpm relevant. I can look over and see the passenger seat shaking/vibrating.
I bought a 12bolt from a guy recently on here and he threw in a "1000hp custom driveshaft" that he had made. I am wondering if maybe the driveshaft is what is causing the shaking? Maybe I need to have it balanced?
Any ideas? I am going to put the stock driveshaft back in as soon as I get the chance...
I bought a 12bolt from a guy recently on here and he threw in a "1000hp custom driveshaft" that he had made. I am wondering if maybe the driveshaft is what is causing the shaking? Maybe I need to have it balanced?
Any ideas? I am going to put the stock driveshaft back in as soon as I get the chance...
Thread Starter
Launching!
Joined: Sep 2004
Posts: 246
Likes: 0
Well, I noticed 1 thing in particular that MAY be causing it...
After I did the relocation brackets (exactly per instruction), now the rear end is out of square. The left wheel is noticably more forward and the right wheel is noticably more rearward. I wonder if this could be the main culprit?
I think I am going to buy a set of adjustable lower control arms, i think it is a good idea in order to straighten that out anyway.
An other ideas?
After I did the relocation brackets (exactly per instruction), now the rear end is out of square. The left wheel is noticably more forward and the right wheel is noticably more rearward. I wonder if this could be the main culprit?
I think I am going to buy a set of adjustable lower control arms, i think it is a good idea in order to straighten that out anyway.
An other ideas?
TECH Resident
Joined: Jan 2004
Posts: 832
Likes: 0
From: Castro Valley, CA
I have the 80 mph vibe, although I'd call it minor. See setup details in sig.
I had U joints inspected (OK) and driveshaft replaced (with the LPE DS), but I still have the vibe. It feels like driveline because it is most noticible when I give the car a little gas at that speed. Once I let off the gas, the vibe disappears... although the engine rpm and vehicle speed are virtually the same. Not sure what's causing it. I'm going to a 9" soon, though, and throwing in an adjustable panhard... predict it'll be gone after all that.
Other ideas?
I had U joints inspected (OK) and driveshaft replaced (with the LPE DS), but I still have the vibe. It feels like driveline because it is most noticible when I give the car a little gas at that speed. Once I let off the gas, the vibe disappears... although the engine rpm and vehicle speed are virtually the same. Not sure what's causing it. I'm going to a 9" soon, though, and throwing in an adjustable panhard... predict it'll be gone after all that.
Other ideas?
Trending Topics
Mine too I had a vibration on my driveshaft that started at about 110 mph after my 12 bolt install. When I looked at the driveshaft, I have a weight on the front that has been knocked off. Need a balance
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same prob with my DS.. the yokes aren't; completely inline though.. it is getting fixed soon and hopefullt it goes away.. I think i might save for a CF DS later down the road though.. getting a lot of good feedback on them lately! especially pst!
