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Discussion Starter · #1 ·
I need some help! I get this horrible vibration in the rear of my 79 280ZX everytime I go above 45mph. All the wheels are balanced and the transmission is new. Could it be the rear end?? The vibration used to start when I would deaccelerate at speeds above 60 then it moved to 55 then to 50 now is vibrates all the time after 45. Doesnt matter if I am accelerating or deaccelerating.
 

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Discussion Starter · #2 ·
> I need some help! I get this horrible
> vibration in the rear of my 79 280ZX
> everytime I go above 45mph. All the wheels
> are balanced and the transmission is new.
> Could it be the rear end?? The vibration
> used to start when I would deaccelerate at
> speeds above 60 then it moved to 55 then to
> 50 now is vibrates all the time after 45.
> Doesnt matter if I am accelerating or
> deaccelerating.
it sounds like it may be the driveshaft, or a side axle shaft. Get the weight off of it, or remove, and inspect drive shaft, and axles. The driveshafts u-joints are not owner serviceable, unless you own a driveline shop, and the side axles have replaceable u-joints.
We have a good supply of used driveshafts, if that is the problem. I would need to know if it is 2 seater, or 4 seater, and where you are located to give you a quote. thanks, Joe 1-800-533-5659
 

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Discussion Starter · #3 ·
> I need some help! I get this horrible
> vibration in the rear of my 79 280ZX
> everytime I go above 45mph. All the wheels
> are balanced and the transmission is new.
> Could it be the rear end?? The vibration
> used to start when I would deaccelerate at
> speeds above 60 then it moved to 55 then to
> 50 now is vibrates all the time after 45.
> Doesnt matter if I am accelerating or
> deaccelerating.

had this prob. before. definately sounds like u-joints. I would even go to say that it is the driveshaft and not the axle shafts. yank the driveshaft and pop in some new u-joints(harder than it sounds)

JN
 
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