Quote:
Originally Posted by timmyc
From reading your posts, I will follow your advice on the trans fluid. But I do have a question. How did you come to the conclusion that the viscosity is too thin?
I too, CW, am in the Presidents Club with FCP.  |
It's an expensive membership eh?
As to the fluid. It's only through reading/watching the interweb mechanics and my recent experience with ZF transmissions. The viscosity issue was through observation of the different fluids and the behavior of the transmissions with each fluid. Our E70 (a saga documented on that section of the forum) had an E clutch bearing/bushing failure and wouldn't hold pressure in gears above 3rd. The Valvoline Maxlife was the only fluid able to get that transmission to go into 4th gear at all. And this is after a full valve body rebuild and doing all the seals between the VB and trans. So nothing scientific, but enough to have convinced
me. Of course, YMMV (though two more ZF6hp's are getting the Valvoline on Saturday).
Edit: For the record, of the 4 ZF transmissions I am running right now (3 6HPs and 1 8HP), 0 of them got/will get ZF fluid put into them during trans service. Our E61 has Liqui Moly (~9k miles since change @ ~190k miles), the E70 has Valvoline (only ~250 miles since change @ 88k miles), the F15 has Pentosin (~2400 miles since change @89k miles), and the E53 is getting Valvoline this weekend (~126k miles on vehicle).