Originally Posted By: john_pifer
Originally Posted By: 4WD
Have used M1 gear lube for 20 years … but couple years back, went to Delvac 1 since it did not need the LS additives …
Interesting.
My Taco does not have a LS diff. So, I wondered if it was alright to use the M1 75-90, because it does contain the LS additive. I went ahead and used it.
Do you think it will hurt anything? Honestly I can't remember if the M1 I used the last time back in 2012 had the LS additive.
Nothing bad happens if you use LS oil in an open diff. I used them in my mom's 2005 Jeep Grand Cherokee, and there weren't any problems in the 160,000 miles she owned it.