Typically its one rollback, TCM and ECM in the original strat combination. But Bill can Combine Different ECM and TCM programs, providing they're in the same family. 03's to 03's, 04's to 04's, and 05 and up.
For example. My excursion has the VXBC6 ECM program, but has the TCM program thats was married to the VXBB1(IIRC) program. That TCM program program came on 04's made in late 03 and had a constantly locked TC when the trans was in tow/haul mode. It also down shifted from 3rd to 2nd. Non of the later TCM programs offered those two features again.
However, when you Mix and Match like that, It can cause issues for the programers(SCT for example) so ask Bill about it in detail if your interested in it.
Otherwise you'll get the ECM and TCM programs that were married to eachother originally, in one rollback.
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