02-09-2023, 08:45 PM | #1 |
Drives: 1977 Pontiac Trans Am Join Date: Oct 2019
Location: Florida
Posts: 210
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Rear Diff Fluid Change
How often are you guys changing the rear diff fluid? I changed it before the first time I went and then did about 6 events over a year and changed it again and did another 5 events and some autocross before this january. Wondering if I should go longer than a year or keep this pace.
Thanks Doug |
02-09-2023, 11:55 PM | #2 |
Drives: 2022 Camaro 1SS 1LE Join Date: Sep 2022
Location: Seattle, WA
Posts: 53
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Same question. High Performance supplement says that changing diff oil is needed after every track day. Seems like an overkill to me.
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2022 Camaro 1SS 1LE Rapid Blue 6MT
Looking for traction on wet pavement in Seattle. |
02-10-2023, 01:02 AM | #3 |
Drives: 2021 2SS 1LE Join Date: Aug 2020
Location: Cary, NC
Posts: 805
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I believe the high performance supplement used to say to change the rear diff fluid every 24 hours. Then I believe it was subsequently changed to every 15 track hours. The 2021 or 2022 HPS then stopped mentioning an interval. But most of us here who track change it every 15 hours, along with the M6 trans fluid at the same interval.
But changing the rear diff fluid after every event would be insane. Now, you may be confusing the part of the HPS that says to change the rear diff fluid after your 1st track event. This is correct to do because it's the first time you are really using rear diff a lot, so there will be more debris in the fluid. |
02-10-2023, 01:11 AM | #4 |
ITCRNRS
Drives: 2018 ZL1 1LE Join Date: Jun 2012
Location: Wichita KS
Posts: 1,575
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I change manual trans fluid and rear axle fluid before each track season starts, so once a year for both.
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02-10-2023, 06:45 AM | #5 |
Drives: Camaro 1ss Join Date: Nov 2019
Location: Wisconsin
Posts: 495
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Once a year here as well.
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02-10-2023, 07:06 AM | #6 |
Shadow Gray '19 ZLE M6
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Another vote for once a year.
I do diff fluid, trans fluid & brake flush (Castrol SRF) before the season. I'll usually do another brake flush halfway through the season. I shoot for an oil change after every event, but once in a while I'll do two events before changing. My HPDE season is March - October typically, sometimes a November event.
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02-10-2023, 08:07 AM | #7 |
Drives: Chevrolet SS 1LE Join Date: Oct 2019
Location: St. Charles, MO
Posts: 1,446
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Autocross and track days are both really hard on the diff fluid and clutches, but changing after every event is over the top. I do both activities enough that I just change it every time I change the motor oil and filter. It's not that hard or expensive to do.
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Matt Miller
2020 SS 1LE |
02-10-2023, 12:07 PM | #8 |
Drives: 2004 BMW 330CI, 2022 1SS 1LE Join Date: Dec 2021
Location: NC
Posts: 745
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every 24 hours is what the manual calls for, that's when I do mine.
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