Rear end "popping" fixed.....

[Chas]

I took advise from here and changed the fluid in my differential......I added GM posi lube and the popping is gone and she rides perfectly
It did make the noise a time or two but by the time we got home it was just as quiet as could be.
Thanks gang
Pics from today's ride...

 

[GTR1999]

Nice looking coupe.
Glad the additive worked, stay with 90 or 85-140 gear oil and the GM additive. That should work fine. If your car is original it has the old, weaker snowflake clutches so if you start to hear the noise again and hammer the car you may need to look into it. For now enjoy the car.

 

[Chas]

Thank you for the compliment and advise