what fluid should i use in my tt 6-speed? how about in the differential?
we recommend only the stock v160 oil for the 6-speed.it works great.pricey, but not compared to the thousands for a new transmission.do not use redline synthetic d4 atf for the transmission.click here to read why.other brands you may use at your own risk.the redline synthetic 75w90 (not the 75w90ns) in the differential works well.