The way I look at it is.. what we have is a transmission built and designed around a certian fluid it runs the best on that fluid. The introduction of any other fluid wether certified by in house labs that it meets specification -X is taking a chance that it was more than likely met the cert in an outhouse .
Not bad prices.
The way I look at it is that there is nothing special about ZF 8/9 speed fluid and other fluids will suffice and is only an issue to worry about if in warranty to remove finger pointing.
Me - the fluid isn't that different in price, it's recommended, and I know I can't go wrong.
Can´t argue with the logic. But I can say this. Red Line is very reputable as a high performance synthetic lubrication company. I don´t see any reason to think they would lie or make a claim that is not true. I´ve also used their products many times, in many applications over the years, including in my JL, with good results.
Question....my son-in-law and others have said they refund you money for sending back used fluid. He told me he gets nearly a full refund. That makes no business sense to me, at all. What´s the story behind that?
I think the business side of it is that few people actually follow through on it. But they do follow what they say.
That's a fact for rebates and other mail-in things. My son studied this in college (and his wife in business management also touched on this)
Yeah and when your way over 60k as I was at 130k and then change the transmission I think
to me logic says go back with the OEM fluid again.
