vibration when letting off the accelerator

[Northernfins]

A 1962 Chrysler I bought is having a vibration issue on the road; it drives well and smooth when I accelerate and as long as I stay on the gas while cruising, when I take the foot of the gas pedal at speeds higher than 40 mph, the car has quite a vibration, as soon as I touch the gas again, it goes away. It`s also not as bad or non existent at lower speeds.
I changed all four tires, wheel bearings are tight, the front wheels don`t move vertically or horizontally when I try to move`em by hand.

Any ideas on where to look next, does the fact that there is no vibration while on the gas point to a problem with the driveshaft or transmission/engine?


Thanks for the help

Marty

 

[F Preston]

I'd check your driveshaft.

 

[1978 NYB]

X2 on the driveshaft.

 

[Big_John]

X3

 

[bulldogchesty]

Also check your motor mounts.

 

[Northernfins]

Thanks guys, I`ll check the driveshaft and motor mounts, 10 - 4

Marty

 

[68blackbird]

Update?

 

[moper]

Transmission mount too - in case you overlooked that.