Rear gear oil
#1
Rear gear oil
New gear set says to use 80w90. I'd like to follow the instructions. But 80w90 is not a very common oil at my stores. They have Mobil 1 in 75w90. Will that work the same. It's synthetic btw
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This is an important consideration. For example, the stock '98 rear calls for conventional oil due to the Auburn LSD. Changing gears won't change this requirement. If you have a Torsen LSD, then synthetic is fine.