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Just rebuilt 4R100
Just finished rebuilding a 4r100 for my 99 powerstroke. It is a reman unit, had a year under warranty yet but the po took it to the dealership and they wouldn't warranty it because it had a magtec pan on it.
Anyway, I rebuilt it put it in, everything sealed fine, seems to shift into r and d fine, but when I drive it, it won't shift out of first. It does sometimes and then immediately shifts back into first.
Now this is my first auto trans, I've had zf6, nv4500 and nv5600 before so I'm new to this auto stuff.
Pulled dtc from the edge in the truck and only had p0603, nothing to do with the trans.
Possibly just low fluid since I just had the entire trans apart? I got home and the aux tranny cooler line exploded so I haven't had a chance to run it again, it's 17* here and I don't have a garage.