I just purchased an 79/80 RX7 ITA/IT7 car. The past owner was putting it together when he passed away. The car was bought at the estate sale from the man that I bought it from. It has been sitting for a year or so...
As I am pushing the car in the driveway, the rearend makes a clicking noise when I turn the wheel. When the car is moving straight, the noise is gone.
It has a LSD/disc brake rear end.

Any thoughts would be greatly appreciated.

 

does the rear have fluid in it >? just throwin that out there cause i know a guy that forgot that .

 

Yeah, check Rearend fluid.

Otherwise it's probably a UJoint. Some guys find a shop that can replace the UJoints, some guys buy an OEM driveshaft for $450 from mazdatrix.com and some guys buy an aftermarket driveshaft for $225. Some, like me, get one from a junkyard like Pick n Pull for $15.

 

Could be just the LSD is tight and makes a noise as the clutch plates slip/grab. Not a problem if that is the case

 

U-joints are not affected by turning since they are before the diff.

Most likely its the LSD chattering,if its the stock unit.Its possible the P/O didnt use LSD gear oil and the clutch plates are grabby.The full locker in my Samurai does the exact same thing,as the cogs ratchet around,only when turning.When you are going straight,the differential is not functioning,thus nothing inside it is turning to make any noise.

Its also possible you have a broken axle or LSD unit.

 

MY guess is lsd chatter or a busted axel bearing. possibly really warped rear brake rotors

 

Rotors wouldn't make a difference if it was turning or not. Check fluid, if that is fine, inspect the rest of your rearend, axles, suspension, then look into rebuilding your diff.

 

Problem was no fluid. I am realizing that there are some things on this car that are completed, and some that are not, and some that are in the middle.

I guess I am going to have to check everything and take nothing for granted so I can know for certain.

Thanks for all the help...more questions for follow.