While driving my 280zx from a dead stop , I heard a thump,thump (on off) sound from the driver's rear tire area. It sounds like some parts are moving around due to the motion. On the road at speed there is no problem. From a stop sign or at low speeds the sounds happens. Bad shocks? 

It could be.  Or it could be a bad bushing.  Or a bad shock bushing.  Lift, grab, wiggle, listen, look.  The cars are old and the rubber degrades.  You'll probably find something.

16 hours ago, jwwhite said:

from a dead stop , I heard a thump,thump (on off) sound from the driver's rear tire area

Maybe the brake pads have (normally) a little play and are dry? just a good clean and some coppergrease behind the pads needed?

Something stuck inbetween the brakes?

Otherwise make a vid with the sound..

Thanks for the quick info. to check on.

On 8/22/2021 at 2:02 PM, jwwhite said:

While driving my 280zx from a dead stop , I heard a thump,thump (on off) sound from the driver's rear tire area. It sounds like some parts are moving around due to the motion. On the road at speed there is no problem. From a stop sign or at low speeds the sounds happens. Bad shocks? 

Tire store said the bushings on the left strut are worn out. Where to buy the rear strut assemblies for the 79 280zx. He could only find the strut inserts, no assembly

https://www.oreillyauto.com/shop/b/shocks-struts/shock-strut/75de62e0ee1b/v/a/6638/automotive-car-1979-nissan-280zx?q=shock%2Fstrut

 

Thanks, Zed Head

14 hours ago, jwwhite said:

Where to buy the rear strut assemblies for the 79 280zx.

KONI makes them again, just a year in production i think?  brand new, for the 280zx!! (look for the topic here on czcc!)

Motorsport! Koni - The Z Store, Nissan-Datsun 240Z-260Z-280Z-280ZX-300ZX(Z31/Z32)-350Z-370Z Parts