Regular 75w90 In My Rear Axle
 

Ok, long story short, i currently have regular 75w90 in my rear axle, not the synthetic stuff with the limited slip additive like it should be. It has a couple thousand miles with this stuff in it

Tomorrow im gonna drain and refill with the correct fluid. Is it possible that i may have some damage to the gears and/or limited slip? Do i need to totally flush it or will a drain and fill work?

I would just change it with the syn and be done with it

after ya get the cover off jack up each side of the truck a side at a time so the oil in the axle tubs can drain out too

you got a possi

drain and fill will be fine...... i always use 2 tubes of additive i get from advance or autozone that's in a blue tube and is for limited slips...... these rears are so big to me that's the bare min...... i always use 2 in my other vehicles with ford 8.8" rears..... i never have had any problems.....

supposedly the oil from dodge already has the limited slip additive in it. Thanks for the quick response by the way

Should be good to go:)