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N Camarolina · 02-10-2023, 02:02 AM

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, 02:02 AM	#3
N Camarolina Drives: 2021 2SS 1LE Join Date: Aug 2020 Location: Cary, NC Posts: 960	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.