95 Z28 - Vibration at 80 mph - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
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post #1 of 4 (permalink) Old Sep 30th, 99, 05:28 PM Thread Starter
 
Join Date: Sep 1999
Location: Glendale, AZ USA
Posts: 1
When I reach 80 mph, there's a vibration in the rear. The car has 36,000 miles on it and has done it since it was new. I had two dealers look at when it was new and they say there is nothing wrong. Is this a normal occurance? Any suggestions?
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post #2 of 4 (permalink) Old Sep 30th, 99, 05:48 PM
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Join Date: Aug 1998
Location: Ft Wayne In.
Posts: 305
The driveshaft is bent/twisted. A friend of mine had one, didn't vibrate until 85-90, then would smooth out over 100.
There's a bulletin on it, if your local dealer isn't interested in finding it, let me know and I'll look for it.
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post #3 of 4 (permalink) Old Sep 30th, 99, 05:55 PM
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Join Date: Aug 1999
Location: edmonton
Posts: 117
No this is not normal and if you want to find the problem you may have to bypass the dealer.Most dealers are not equiped to check fo driveline vibrations therefore don't really know what the causes are.They usually check the obvious like tires and u-joints but don't count on it.Go to a shop that specializes in driveline and get them to go for a test drive there are a few things they can do to narrow the problem down and in alot of cases can even pinpoint the problem on the test drive.I use to build driveline and when a customer came in it was because he had a vibration or noise after awhile it's like anything else you do alot of it comes natural.If you live in western Cdn I can probably send you to a good shop close to you.
I just read your profile so I guess I can't send you to any I know.Be careful of machine shops who say they do driveline if they don't have a proper balancer go to someone who does.If you take the shaft out of the car they will usually give you a free estimate on the repair.It's still better to let them test drive it first it makes it easier for them to narrow the problem done.Good Luck.

[This message has been edited by craggar (edited 09-30-99).]
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post #4 of 4 (permalink) Old Oct 9th, 99, 09:24 PM
 
Join Date: Oct 1999
Location: Kirkland, Wa. USA
Posts: 3
This is why there is a TSB on drive line shake for 93 to 97 Z28's and Trans Am's.

If you look all 98 and up car with 3.23 and up gears have the 1LE Aluminum shaft.

I am now running the Modern Muscalcars metal matrix composit shaft

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Thump'n hard 'n Fly'n Low...2FST4LV
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