Gear oil Q

[Brayten#4]

How much gear oil should be put in a 9 in rear end. Also what weight, syn or non. 2008 shaw Midwest Modified. Thanks

[72Dubya]

Around 1 gallon should do. Redline Heavy Shockproof is about the best there is for a 9".

[save the racers]

We got better gear life out of 140 weights from tractor supply than the syn 90 weights.

[dereksehi]

85w140 Valvoline with not one issue. I have always used 5 qts in my floater without inner tube seals and never had an issue.