Hello, I am a new member but a long time follower and have a question. What is the correct gear oil for the rear differential with Limited-Slip on my 08 Tacoma TRD Sport 4WD?
My Toyota manual says: Above 0F SAE 90, Below 0F SAE 80W or 80W-90. My Toyota dealer also say they use SAE 80W-90gear oil with LSD additive. I live in Dayton, Ohio and the weather here can be -10 below in winter and 90+ degrees in the summer. The reason I ask is why so many people in here recommend SAE 75W-90? The local auto part stores also say to use the SAE 75W-90 gear oil for the rear differential. So do I go with the dealer and Manual to be safe or go with the (SAE 75W-90) Synthetic? Thanks in advance for your input. BTW, the truck has 32K mile and runs smooth and fine with no issue, just wanted to do the regular maintenance recommendedby the Manual.