Cat 3406e ecm questions?

I would try it.

 

You would need to check the test spec number from each ecm. Then compare the numbers on the cat site to compare the iron differences. If that's OK. Then you would have to check all the parameter differences and make those changes. If they are from different oems inputs/outputs maybe different. Also ppm will be most likely different. (Tranny,tire size etc)

 

Just be aware, your engine will only be good for a certain max hp rating. To uprate a caterpillar engine, sometimes iron will need to be changed. The different turbo is one of those things. If I remember correctly, higher ratings require different cylinder packs and such. I'd go into Cat with the engine numbers and see what that engine can safely handle. My ISX currently rated for 450hp can only be uprated to 475 max. Any higher needs better internals.

You could likely use the other ecm but you can't push it if your engine isn't built for it.

 

Post both engine serial numbers. There is a few people on here that can research and tell you.