- Joined
- Nov 15, 2021
- Messages
- 15
Hello and good day fellow enthusiasts,
I have a 2001.5 Audi S4 that I'm getting ready to do some major maintenance on. I've came across threads on multiple platforms that indicate the gearbox should have a GL4 spec oil and not to use GL5 since it has phosphorus and phosphorus eats yellow metals.
I've read that the rear diff can use the GL5 spec oils.
Initially, I leaned towards redline 75w80 (I believe it's called MTL) but have read lots of unhappy feedback with notchy shifting in the colder months. I've came across the recommendations of motul gear 300 75w90 for trans and rear diff, but a few unhappy remarks about notchy shifting.
I'm thinking of maybe OE fluid in the gearbox and motul gear 300 75w90 in the rear diff?
Does anyone have experience with the 01E and the B5 S4's rear diff to provide feedback?
Thank you in advance for your time and support!
I have a 2001.5 Audi S4 that I'm getting ready to do some major maintenance on. I've came across threads on multiple platforms that indicate the gearbox should have a GL4 spec oil and not to use GL5 since it has phosphorus and phosphorus eats yellow metals.
I've read that the rear diff can use the GL5 spec oils.
Initially, I leaned towards redline 75w80 (I believe it's called MTL) but have read lots of unhappy feedback with notchy shifting in the colder months. I've came across the recommendations of motul gear 300 75w90 for trans and rear diff, but a few unhappy remarks about notchy shifting.
I'm thinking of maybe OE fluid in the gearbox and motul gear 300 75w90 in the rear diff?
Does anyone have experience with the 01E and the B5 S4's rear diff to provide feedback?
Thank you in advance for your time and support!