Driveline vibration problem

[Ironangel]

The desired pinion angle is 3 degrees down. I think the fact that you went to a single piece drive line compounded with a loose incorrect carrier backlash led to the vibration more than just pinion angle. I've dropped several coil rear trucks and never changed pinion angle on any of them and never had a vibration problem. I keep the two piece driveshaft's intact because they maintain stability under load and at high speed. Camaro's and Mustangs have two piece driveshaft's for a reason..."Just Sayin" ~Ghostrider~ PS. Glad you took the time to come back and clarify the problem Snipe, Kudo's...

[snipescastle2]

Originally Posted by Ironangel

The desired pinion angle is 3 degrees down. I think the fact that you went to a single piece drive line compounded with a loose incorrect carrier backlash led to the vibration more than just pinion angle. I've dropped several coil rear trucks and never changed pinion angle on any of them and never had a vibration problem. I keep the two piece driveshaft's intact because they maintain stability under load and at high speed. Camaro's and Mustangs have two piece driveshaft's for a reason..."Just Sayin" ~Ghostrider~ PS. Glad you took the time to come back and clarify the problem Snipe, Kudo's...

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[snipescastle2]

Originally Posted by snipescastle2

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Thanks! I'm just happy I got it resolved, I spent a small fortune to make sure I got it right
this time around. And you're right about getting back to answering the solution to the problem
I can't say how many unanswered posts I've come across in the years I've been lurking here.
Be
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[kileyb]

Thanks for the bit of knowledge below. I’m having vibration issues, kicks in around 60 and rolls or ebbs and flows about once per second. Seems to happen once things warm up. Letting off the bass or going to neutral doesn’t have any effect. I just had a 700r4 installed with New driveline and carrier bearing. The carrier bearing mount failed a few weeks ago (spot welded instead of being fully welded, thanks a lot Six States Distrubutors) and the transmission guy welded it back. I also dropped the rear 4 inches. Just had the tires balanced. Wonder if I’m having the same issues with the rear end. Unfortunately I don’t know a thing about working on them and don’t have a shop or garage to do the work myself at the moment. All that said I was thinking I needed to go to a one piece driveline to eliminate the carrier bearing as a potential source but decided against it after reading this post.

71 c20 with coils and Eaton rear end.

Originally Posted by Ironangel

The desired pinion angle is 3 degrees down. I think the fact that you went to a single piece drive line compounded with a loose incorrect carrier backlash led to the vibration more than just pinion angle. I've dropped several coil rear trucks and never changed pinion angle on any of them and never had a vibration problem. I keep the two piece driveshaft's intact because they maintain stability under load and at high speed. Camaro's and Mustangs have two piece driveshaft's for a reason..."Just Sayin" ~Ghostrider~ PS. Glad you took the time to come back and clarify the problem Snipe, Kudo's...