GlassTop09
Senior Member
Hi All,
I'm curious as to how much diff oil volume y'all run in your rear axles to adequately ensure that there is sufficient oil present to cover pinion\ring gearing & bearing lubrication along w\ sufficient cooling while running on track. Do most just do the fill until you spill thru the fill plug, or do you fill to a specific oil volume amount? If you do use a specific oil volume amount, what is it (OEM is 4.25 pts or 2 qts 4 oz which should equal the fill\spill IF you're running a Trac-Lok diff), especially if you're running a diff other than a Trac-Lok (creating different displacement area)?
I ran across this YouTube video from Richmond Gear which at the 9:30 thru 11:00 time section, it mentions a recommendation for circle track racers to intentionally overfill the rear axle to offset the centrifugal forces that deposit diff fluids into axle tubes (probably has a lot to do w\ oil getting spit out of the axle vents mounted on the axle tubes) to ensure that ring\pinion gears & bearings (LSD friction clutches as well) don't get starved of oil, but doesn't say as to how much:
Richmond Gear - YouTube
Any insight given here is greatly appreciated as I've never heard of doing this before but from viewing this video, this is a thing & from doing a search here, no info turns up so I'm inquiring. I can see this being common on long freeway runs at higher speeds as well as on long sweeping straights at the track is why I'm posting.
I'm curious as to how much diff oil volume y'all run in your rear axles to adequately ensure that there is sufficient oil present to cover pinion\ring gearing & bearing lubrication along w\ sufficient cooling while running on track. Do most just do the fill until you spill thru the fill plug, or do you fill to a specific oil volume amount? If you do use a specific oil volume amount, what is it (OEM is 4.25 pts or 2 qts 4 oz which should equal the fill\spill IF you're running a Trac-Lok diff), especially if you're running a diff other than a Trac-Lok (creating different displacement area)?
I ran across this YouTube video from Richmond Gear which at the 9:30 thru 11:00 time section, it mentions a recommendation for circle track racers to intentionally overfill the rear axle to offset the centrifugal forces that deposit diff fluids into axle tubes (probably has a lot to do w\ oil getting spit out of the axle vents mounted on the axle tubes) to ensure that ring\pinion gears & bearings (LSD friction clutches as well) don't get starved of oil, but doesn't say as to how much:
Richmond Gear - YouTube
Any insight given here is greatly appreciated as I've never heard of doing this before but from viewing this video, this is a thing & from doing a search here, no info turns up so I'm inquiring. I can see this being common on long freeway runs at higher speeds as well as on long sweeping straights at the track is why I'm posting.