Need an exhaust brake.

[p-Bar]

I owned a 04.5 and followed the long thread with the dude from Jacobs that was testing them for the cummins. 04.5 didn't have enough ram in the ecu to load the jacobs exhaust program and there was worry that thrust washer was not in this year also. So jacobs excluded this year from the matrix. I did install the BD brake with their controllers to make the whole thing work. Maybe Ozy's is the "euro edition"

 

[Ozymandias]

It's a Canadian model truck.
And yeah, it works, it's not only the lock up, the whole shift pattern is modified if the EB is on. Also forced downshifting (rpm permitting) and re-lock up is present in case one is using CC downhills.

From what heard it's only the 05 that this program isn't in the ECM.

We discussed that topic several times through the years here on TDR.