[h018871]

Originally Posted by carguy55

Been loving the Mobil1 ATF on track. No more 2-3 shift issues.

Mike, do you use Mobil 1 Synthetic LV ATF HP? There are several synthetic options

[mtdwye0]

Would Redline D6 ATF be better than D4?

[OneLapWonder]

I recently changed using ACDelco 10-4033.

1-2 shift is easier to grind since it gives you a false sense of getting fully into the gate and you get the grind when you let off the clutch.

[booyaa56]

Originally Posted by AZ_1LE

Amsoil ATF Signature Series. Fantastic improvement in shifter smoothness.

AZ_1LE which one the blue or red option?

[WishfulSS]

Originally Posted by mtdwye0

Would Redline D6 ATF be better than D4?

Redline oil recommends the D4 for our cars. I will be using Redline for the trans as I used MTL in my 1997 M3 that was at 207K miles with the original tranny including about 1800 autocross runs.
Question: Does anyone change out the GM fluid for Redline before they get to the 15 hours of track time? A pre-emptive change? Thinking of changing at 1500 miles with the differential.

[avarshav]

how often do you guys change the manual tranny fluid? I have 8k miles on my 20 ss 1le, still on the original factory fluid. I dont drive it much obviously, and never track it, just spin around town a few times a week.

Can't really go by the owners manual on this. For example, it says you don't need to change the rear diff fluid for a while, but based on this board, I changed mine twice already, and it really needed it, and now I do it every year regardless. Haven't thought of doing the manual trans fluid yet, but now I'm thinking....

[TrackClub]

Originally Posted by avarshav

how often do you guys change the manual tranny fluid? I have 8k miles on my 20 ss 1le, still on the original factory fluid. I dont drive it much obviously, and never track it, just spin around town a few times a week.

Can't really go by the owners manual on this. For example, it says you don't need to change the rear diff fluid for a while, but based on this board, I changed mine twice already, and it really needed it, and now I do it
every year regardless. Haven't thought of doing the manual trans fluid yet, but now I'm thinking....

The diff defo needs a break in period, but the tranny doesnt, so very different considerations here. However, I would change the tranny fluid based on the fact, that it is now 4 yrs old. Hope this helps. Cheers!

[Msquared]

I'm doing an annual change for my diff and tranny, but I am putting about 8 on the car each year, with lots of autocross runs and 2-3 track days per year. It definitely shifts better with fresh fluid in it.