Want this question answered?
75w140 synthetic with limited slip additive.
Changing differential fluid is no different from changing engine oil. You just have to make sure that you find the correct drain plug on the bottom and the correct filler tube on top. --Ken On some differentials you have to remove the cover plate to drain.
go to a GM dealer and they have a limited slip additive that you add to your rear end fluid.
You can use any SAE certified rear differential fluid in your 1970 Chevrolet. The 1970 Chevrolet differential fluid can be checked from the differential fluid check port.
Only if it is a "limited slip" differential.
It has a transaxle, there is no separate differential fluid.
What is the fluid capacity front differential 2004
In the differential
If it is only "shuddering" or "chattering" in turns, try adding special low viscosity fluid (from Ford).
If there is not a drain plug on the bottom of the differential then you will have to remove the rear cover. If that is the case you will need a cover gasket. If it is limited slip, then it will require a special additive. Also be sure of the weight and if it is synthetic or not.
If it has the G80 Locker use 80-90W gear oil without the limited slip additive
75w90. Limited slip requires an additive.