Hey Guys,
I recently bought a 92 F150 AOD. The PO told me it hard shifted before I purchased it but for the price and the purpose I wanted for the truck it was hard to pass up. I found several posts on the hard shift like checking the tranny fluid level and TV cable adjustment and will try those remedies, When I ran the codes i came up with 3...I tried to find each of them, but the piecemealing was making me nuts and the repair manuals just don't give enough information! So if someone wouldnt mind helping me out with my list...

637 TOT circuit above max range. I found something about this. One post said the transmission is shifting too fast and causes the transmission to over heat. Is that what this code means and what do i do about it and could this be causing the hard shift too?

334 EGR closed voltage higher than expected. Couldnt find anything on this.

624 EPC solenoid or driver circuit failure. Again, couldnt find anything on this.

Any help will be greatly appreciated!!

Thanks, Greg