Hello, looking for any advice to help my situation. I recently rebuild the 4L60e in my 2007 Hummer H3, 3.7. Feels like it is starting in 2nd gear and only shifts once after that. Had a transmission guy hook his scanner up to it and it shows that shift solenoid a and b are on together in every forward gear. Also, there is almost like a dragging between 2nd and 3rd gear. Any ideas? Thanks in advance.

 

He also said there was a stored code of P0741 but it seems to have cleared itself. The transmission will shift manually in 1st, 2nd, and 3rd but when moving to Drive nothing changes.

 

MY main idea is, whoever tried to rebuild it did not do so correctly.