OK, I've got to solve this so I'm starting a new thread. I posted this on the 3rd Gen forum and on the General diesel without 1 response in either.

This is a 2005 HPCR Cummins in a 1968 F250 with a 48RE controlled by an ATS controller behind it. When having the tranny rebuilt, the truck came back with significantly less power. In another thread someone pointed out that I may be rev limited - and I have pretty much decided that is what has happpened. I can't rev over 2250 or 2300 no matter where the throttle is and it also appears that the engine is pulse width limited as well. Otherwise the truck starts and runs fine.

It was suggested that this cold be due to a lack of a speed sensor. My truck as a speed sensor in the tail housing of the transfer case and I pulled it and took a look and it appears fine.

Is there anything else that can trigger this? Is there a page (or two) in the FSM on this?

The next steps would be to take look for the signal at the ECM but I don't know where to look or how to check it. Then to pull the tunnel up and take a look at the wiring that runs from the speed sensor to the ECM - but that is a major investment in time and I want to know what I'm looking for before I do that.

Any help would be appreciated.

Peter