Rear gear oil

[DJM]

What weight of gear oil goes in the rear diff and how much oil and is there an oil with the friction modifier in it or do I need that too and how much if I do

[captivahach]

75w-140 if you have the ford 10.5 If i remember up to 3qrts. Most of the full synthetics have the lsd additive in it. if not you will need to add it

[chrispaine]

http://guzzle.rbmicro.com/index.html

[DJM]

I was planning on using Royal Purple oil thanks for the info.