Transmission problems and noise on my 2001 Ford F-150 2wd
I have a 2001 Ford F-150 2wd with the 4.6 motor with the 4r70w transmission . I just installed it a few hundred miles ago and I pulled it from a junk yard. Shifted perfect when I first installed. Now I have to let off the gas before if will shift into second other than that it shifts perfect. I also here a humming noise I’m assuming is coming from the transmission. And the o/d light keeps flashing on and off. Just replaced the filter and ran new fluid. Didn’t find any metal shavings . Was hoping maybe it was a simple fix and not the transmission ?