i need help bad. I was driving my 07 suburban lt 4wd with 5.3l this morn all of a sudden I lost d and 3. I still have reverse and 1 and 2. Is it the tranny or is there some other things I need to check before I try to get a tranny? Any help is greatly appreciated.

 

Check the fluid level first. If that's OK, you should take it to a tranny shop for analysis.

 

Does anyone have any suggestions on the best reman to replace the tranny with?