Anybody have any thoughts on lucas? mabey half 80-w90 and half lucas additive ,it says on the bottle using the oil additive I shouldnt neet to add limited slip lube My rear end is giong POP--POP--TINK-POP-TINK when turning left under power Im thinkin its the locker on the count I can hear that left rear tire dragin/chatterin.

 

i use 80 w90, and a botle of wale sperm (aka the special additive for posi)

 

Might want to look at the clutches before you need new side and spider gears.

 

Thanks im gonna pull the cover and check it out first.

 

i used Red Line Oil

 

I used the Chevron 75-90 (or maybe it was the 90-140...don't remember) full synthetic. Never a problem with the limited-slip. I used the Lucas synthetic 5-30 for my Getrag and really like the results with that.

 

I use 75-90 synthetic with 1 qt of synthetic lucas for front and rear ends abd t-case. 190,000 no problems yet but like Dave said it sounds like you need more than an oil change.