Just had the transmission rebuilt with a heavy duty clutch pack put in because I tow everyday. All was good until about 8000 miles on rebuild and now the shifting is slipping going from 2nd to 3rd. Repair shop has had it for a week and can't find the problem. Any ideas? Thank you.

 

2-3 band needs adjusted. I think. I forget what the exactly corrects 2-3 shift, maybe even up pressure. Lots of times when shops put non-stock items they forget to raise pressure......and a few other things.....I am thinking the 4th gear band or accumulator is messed up due to low pressure, as it weakens it will start to kick-out of gear....

 

The repair shop said they did adjust the bands and checked the pressure to make sure it was right. Still nothing. They just can't figure it out and I'm not sure where to go next. I've got several thousand already in this one.