[HWYSTR455]

Absolutely, all the little things do add up, and those seem to be tougher to isolate too. I have a bad habit of over-engineering stuff, and in a lot of cases am searching for complicated problems when it's something easy staring me in the face. So any chance I have to provide insight in some areas of thinking out loud, especially, I try to soften that logic/process. A bunch of times I've found solutions to my own issues in that process!

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[goatwgn]

I suppose that is what I am doing to try and throw the original poster "a bone" is thinking out loud. In my case (only after I had installed my Gear Vendors unit) did I have a vibration that was driveline related at about 60-75 mph, that wound up being a lot of little things that added up. fixing each little thing made it "better", but in the end it was the fact that they had cut my driveshaft 1/2 too short (causing the yoke to wobble ever so slightly in the back of the GV unit). Had a new driveshaft made up at the correct length by Dennys, and that solved it. Over the years, I had developed a similar vibration in my Oldsmobile, and it wound up being the driveshaft had been "opened up" in the rear very slightly, by some improper u-joint replacement. You could slide the shaft back and forth in the caps ever so slightly. It would not allow perfect centering of the shaft when running. It was only about 1/32 of an inch, but that was enough to cause a vibration.

[mels80ga]

I see that you replaced the trans already, but was it used? I had a terrible vibration in my car and after suggestions from ppl on this forum, including Cliff, I replaced the pilot shaft bushing in the output shaft and the tail housing bushing and it solved my problem.

[pggto]

Originally Posted by mels80ga

I see that you replaced the trans already, but was it used? I had a terrible vibration in my car and after suggestions from ppl on this forum, including Cliff, I replaced the pilot shaft bushing in the output shaft and the tail housing bushing and it solved my problem.

I had the original trans rebuilt buy a very reputable shop, I hope they replaced the bushing, but I will will check for play when I get back under the car hopefully this weekend. Thanks