Quote:
Originally Posted by oldskewel
How much mileage on the truck, and what kind of other previous AT repairs and maintenance (if any) have been done?
I have a 3.0i, which has a different AT (GM vs. ZF), so I can't comment specifically. But when I starting drain+filling my AT for the first time ever at about 169k miles (when new to me), the first fluid D+F (with pan drop, cleaning the pan, new filter) did end up knocking a bunch of new debris loose, which I found in the pan on the second D+F a few hundred miles later. I did the 3rd and final D+F a few thousand miles after that and it has been flawless.
So if you think that data point is relevant to your situation with your ZF, my point is that you can consider the new fluid to have solvents in it that may release new debris/problems just from doing the D+F.
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Thanks oldskewel, that is actually a good thought, maybe I just need to put a few miles on it and drain it again.
My history with the car, purchased at 47k miles and did first fluid change, changed again at 100k miles and at about 105k I picked up the hard 1st to 2nd shift. I babied it that way for about 500 miles, would just let it warm up before I drove it and when I finally had time I pulled the pan, replaced the seals and cleaned everything. When I pulled the pan the magnets were clean as was the fluid having just been done 5k or so ago but after doing the service in an attempt to clear up the 1 to 2 hard shift I solved that and picked up this nasty 2 to 1 down shift gremlin and it's driving me crazy.
I noticed it immediately after putting it back together and test driving the car so I immediately came back, checked my fluid level and actually did an additional drain and fill to which I had no better luck...
That's when I found SIB 24 01 06 calling out the harsh 2 to 1 down shift and ran her out to be reflashed by my local dealership.
With fingers crossed I picked her and and to my dread... the problem persisted.
Since the initial fluid change I've put maybe 900 miles on it, I may give it 1500 miles or so and do another drain and fill - though I am considering buying the valve body rebuild kit and servos if need be...
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