1998 c5 A4 best fluid?

[danc5]

I have to service my auto trans. and Hope that someone has an idea what is the best brand of Dextron 111 fluid. There are lots of brands. What about the Moble 1 synthetic? There will be a mixing with the old fluid still left in the car.

 

[Alex D]

I've come to the conclusion that I'd install a ATF cooler, run OEM GM Dexron III and change it more often, rather than going with the synthetic.

 

[c4c5specialist]

HI there,
Really it depends on what you are doing. If you are just driving the vehicle on the street, then Dexron 3 is just fine. Simply change it every 2 years.
If you are racing, then I would recommend synthetic and change it every 2 years.
Allthebest, c4c5

 

[danc5]

Thank-you very much Alex D and C4C5 Specialist for the very good ideas about the cooler and trans. fluid, and also the tech 2.

Daniel

 

[VETTEX2]

Thank-you very much Alex D and C4C5 Specialist for the very good ideas about the cooler and trans. fluid, and also the tech 2.

Daniel

I use Redline.......