blu240z Posted August 26, 2016 Share Posted August 26, 2016 What gear oil to put in 87 lsd rear Diff ? Also did you add a friction modifier with your gear oil. Searched the threads couldn't find anything on it Quote Link to comment Share on other sites More sharing options...
Zfan1 Posted August 26, 2016 Share Posted August 26, 2016 I run Castrol 80/90W LSD gear oil and add the LSD additive as well. Quote Link to comment Share on other sites More sharing options...
OldAndyAndTheSea Posted August 26, 2016 Share Posted August 26, 2016 Quote Link to comment Share on other sites More sharing options...
malibud Posted August 26, 2016 Share Posted August 26, 2016 +1 on redline with modifier Quote Link to comment Share on other sites More sharing options...
JMortensen Posted August 26, 2016 Share Posted August 26, 2016 Definitely use modifier. I like SWEPCO 201. Any good quality gear oil will work. Even if they say "for limited slip" you still need the modifier. Some of them are labeled Ford, Chevy, Chrysler. Doesn't matter which one you get. Quote Link to comment Share on other sites More sharing options...
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