Originally Posted By: 01rangerxl
Originally Posted By: Bluebonnet
some of you mentioned 75 or even 80W
I do live in NYC, the winters are pretty cold, and I even sometimes drive further north - so yes, cold weather is a factor to consider.
Neither the 7.5 or 8.8 axles are picky in this application.
As a rule of thumb, any limited slip 8.8, just put friction modified 75W140 synthetic in it. I don't think the chatter/noise issues were as common on Rangers as they were on the Mustang though.
Everything else (open 8.8s, 7.5s)...whatever GL5 gear oil you see at the parts store. 80W90, 75W140, 75W90...they are all fine.
Right now I have Valvoline conventional 80W90 in my 1994, and Valvoline synthetic 75W90 in my 2002. I have used synthetic 75W140 in 7.5s before with no issues. I chose Valvoline strictly because of price/availability. I have used everything from Super Tech to Royal Purple with zero issues.
oh thank you. fyi, there's no noise that I've noticed and no other issues, just the leak which in order to be rectified, necessitates replacing the oil. I've been using synthetics as much as possible so I'll go with one of those.
thanks again!!