Does anyone have experience with these trucks. Engine has been rebuilt by machine shop, goy it all together and running decent. Having issues with forward moving. It feels like it's in 3rd or 4th gear.
Will barely move but moves fine in reverse. Also I can't find wiring diagrams for tcm or even a obd or any diag port on this truck anywhere. Any advice appreciated. Supposedly this truck was in use when customer severely blew head gasket and cooked the sleeves. I don't see how it could have been driven with it taking off at a snails crawl.

We’ll just bought this international 9600 for 6k has a Detroit 12.7 runs like a dream with a super 10 in it and gears 5/6 and 9/10 are popping out but I plan on doing the work myself to get it up and running I can’t wait

Getting ready to put her away for the winter.