Just had the trans rebuilt in April and the last couple weeks the Carlo seems to lack power and surges in 1st and 2nd gear. Once it hits 3rd it seems to be fine. I dropped it off at the trans shop this morning but have heard nothing. Has anyone had a similar issue?

 

Another clue is that this started happening soon after I had my A/C compressor and condensor replaced. Also since then the engine seems to be running hotter than it normally has since I got it in April.

 

Cat plugged