Hi everyone, I have a 1991 hdj81 1hdt w/ a hydraulic A442F (I believe it’s hydraulic and not the electronic type because it’s a 91) so my problem is my transmission doesn’t like to shift out of 1st gear when the engine is still cold, I have to manually put the stick into 2nd and it will shift into 2nd and I can throw it in 3rd or D, once the engine is warmed up the trans shifts like normal. If I let the truck sit for say an hour and it cools down it hesitates to shift but it does around 2600 RPM, here’s the catch, the trans does this when it’s warm weather like 20°c and up but it winter the trans shifts no problem when cold. I believe this whole mess is me and my dads fault because we were towing our boat and overheated the trans and it started leaking transmission oil, it stopped leaking once it cooled down and we filled the trans with some gas station universal ATF, we didn’t know how much we lost or how much we put it, well the trans was fine for like a year til the trans started having the problem, well anyways I checked the trans dip stick n the oil was at the HOT level when it was cold so I dumped the fluid via drain under the trans and filled it up with Dextron lll to the correct level hoping the problems would go away, they didn’t. I know I neglected the transmission but does anyone know how can I fix it? The truck only has 260,000kms. Also does anyone know of a good transmission rebuilder in Ontario Canada that knows how to work on these transmissions or anyone that sells them just in case mine is toast? Anyways sorry about the long post I just really wanted to go in depth and try to explain everything clearly about what’s wrong with my trans.