6MT transmission fluid

[blackburn-hero]

Hi,

I have looked everywhere but I didn’t find my answer exactly.

I replace the shift selector shaft soon, I will flush the oil at the same time.

I have in my garage 2 kinds of oil:

Redline 75w90 NS and Redline D6 ATF.

I want to know if it ok to put the D6 or it better with the 75w90?

I know people put D4 ATF but I just have D6 lol.

Another question, I think it stupid but …

For the seal, with the part number from the realoem, the same number part on Fcp euro, they said that part won’t fit on my car?? It an error or I should order anyway?

Thank you again

[--Aramis--]

Castrol TransmaxZ ATF

[RocketyMan]

I would use either the RedLine MTL or the Redline ATF. Don't use the Redline NS gear lube as it's supposed to be intended for transmissions with diffs integrated-like the Subaru manual trans.

Make sure to run the 6MT oil drain/fill routine for the auxiliary oil pump to get the correct transmission oil fill level. I forgot about this and was off by about half a quart almost.