Vibration Vibration Rearend?????
 

I just put a new trans (400 auto) and transfer case in my 67' chevy and I have a vibration that you feel threw the seat. It's not a constint vibration but one that comes and then goes then comes right back again. Only does this at about 55mph and up. I put a new drive shaft on it and I don't hear any rearend noise. I jacked up the back and ran it and it still did it so I don't think it's the tires.. Let me know what you think. Thanks Cliff

Did you have your new driveshaft balanced?

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Toms River NJ
(Transplanted Hoosier)

56 working Street Rod(under construction 71-2 coil chassis)
Give a man a fish and he will eat for a day. Teach him how to fish and he will sit in a boat & drink beer all day.

Yes my driveshaft was balanced. I've got two driveshaft that were built and balanced
for this truck.I'm going to try the other driveshaft tonight. I just can't beleive that Acme driveshaft in Decator Il. would make a bad driveshaft but I guess anything is possible..

Had similar problem with my brothers truck. Found out the bearing cups on the rear u-joint were not fully seated against the universal joint. Found it by grabing the drive shaft in the rear was able to feel slight side to side movement.

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72 Chevy A/C P/B P/S Tilt
454 Engine 400 TCI Trans
3" Exhaust W/Headers
C30 Frame C10 Suspension
Short Wheel Base (Dually)