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Re: 1971 GTX vibration issue [Re: AfterHoursResto] #1358292 12/26/12 07:08 PM 12/26/12 07:08 PM
Joined: Oct 2007 Posts: 4,319 St. Louis, Mo 3 318 Stroker master
318 Stroker master 3 Joined: Oct 2007 Posts: 4,319 St. Louis, Mo	I had the same problem. You may want to have the driveshaft re-checked. I had 2 new d-shafts from local d-shaft companies. Both fresh and "balanced". Guess what...? They weren't...

Re: 1971 GTX vibration issue [Re: 318 Stroker] #1358293 12/29/12 12:06 AM 12/29/12 12:06 AM
Joined: Jun 2005 Posts: 287 MI AfterHoursResto OP enthusiast
AfterHoursResto OP enthusiast Joined: Jun 2005 Posts: 287 MI	Thanks for all the suggestions and pictures. I had to step away from this issue because of the holidays but will get back on it tomorrow. I will keep you posted with what I come up with! Thanks. Roman Sobilo

Re: 1971 GTX vibration issue [Re: 318 Stroker] #1358294 12/29/12 08:34 AM 12/29/12 08:34 AM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	Quote: I had the same problem. You may want to have the driveshaft re-checked. I had 2 new d-shafts from local d-shaft companies. Both fresh and "balanced". Guess what...? They weren't... They can't spin them fast enough, I ran into this as well. Most truck shops only spin 2000-2500 rpm since the big diesels don't go any higher than that. Their eyes just about popped out of their head when I informed them that would not even cover my cruise speed and driveshaft revolutions over 6000 rpm were common.

Re: 1971 GTX vibration issue [Re: gdonovan] #1358295 12/29/12 06:34 PM 12/29/12 06:34 PM
Joined: May 2005 Posts: 583 NJ R rth mopar
rth mopar R Joined: May 2005 Posts: 583 NJ	Quote: Quote: I had the same problem. You may want to have the driveshaft re-checked. I had 2 new d-shafts from local d-shaft companies. Both fresh and "balanced". Guess what...? They weren't... They can't spin them fast enough, I ran into this as well. Most truck shops only spin 2000-2500 rpm since the big diesels don't go any higher than that. Their eyes just about popped out of their head when I informed them that would not even cover my cruise speed and driveshaft revolutions over 6000 rpm were common. There is a difference between eng rpm's and d/shaft revolutions. d/s is measured by mph. 2500 rpm's could be 60 mph depending on gears and tire size.

Re: 1971 GTX vibration issue [Re: rth] #1358296 02/10/13 10:28 PM 02/10/13 10:28 PM
Joined: Jun 2005 Posts: 287 MI AfterHoursResto OP enthusiast
AfterHoursResto OP enthusiast Joined: Jun 2005 Posts: 287 MI	Hey Guys, I shelved this issue for a while but finally got back to it. So the issue was the big ball bearing that rides on the output shaft in the tail shaft housing. I did get lucky as far as it being an easy fix. It really sucks to tear apart a freshly restored restoration. Thanks for all the suggestions and pictures. The vibration is gone! Roman 7583553-popup.jpg (80 downloads) Last edited by AfterHoursResto; 02/10/13 10:55 PM. Roman Sobilo

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