Originally Posted By: SOHCman
Originally Posted By: MolaKule
In addition, the new fluid will be dispersing crud.
+1 did you add any filtration (magnafine, etc.) to to cooler line when upgrading the cooler?
It may be a non issue if that transmission has a real filter in the pan, as opposed to a rock catcher screen.
I did not. The factory filter on these is the Filtran type, which is supposedly a 50-80 micron filter. Better than a rock catcher, but clearly not as good as an external. And, no, I did not change the filter. They are actually a lifetime filter and are designed to last roughly 250k miles. changing them does no real harm nor any real good. The only way they are going to clog is if the transmission destroys itself in some other way and plugs it up, in which case, you need both a new filter and a new transmission.
I'm hoping there won't be much crud to disperse. The fluid that was in there wasn't nearly as dark as the fluid I changed out at 109K. It had been 60k miles, so I felt it was due regardless, given the way I use it, but only indication I had of a fluid problem was a 4-3 downshift flare when the temp was above 180°F. Below that temp the downshift was perfect, but at 180 or above it would have a very slight flare. Hoping the new fluid makes that go away. Not that it was a big problem anyway, as I only see that condition when towing something light on the interstate.
Regardless of the outcome, I don't see myself ever changing the fluid on this transmission again. I doubt it ever sees enough miles to worry about doing it again.
bit it was in the mid thirties and I was going 40 ish on the soft roads to the dump.
