0735. That makes sense. The truck was pulling hard in OD (5th gear). I think when hitting a hill one should take it out of 5th (OD). For me I am towing quite o lot of weight. OD is just to much.

I installed the 70hp program. I wonder if I should put it back to 80hp?

Did you ever come up with a plug-in reprogramer?

With the CA smog law I would think that would be a must.

Andy