Do I have to pay additional credits to get my enhanced OS back so I can have 2 bar availability. I believe I'm on the right track now but want to make sure so I don't screw up the pcm. I'm trying to do a 60e to 80e swap. Everything else is done, wiring, drive shaft and so on. My original OS # is 12212156. I've concluded I can't do a segment swap to the Enhanced OS being my engine parameters went to hell. So I tried it to my original stock tune/OS# and everything appears to be in place, except for not having 2 bar. So now it looks like I have to apply the 2 bar OS again and then transfer my current tune over. Everything minus Trans and Trans Diag.
Also the vehicles I found, only 2, at the Tune Repository only had 4.10 gears, I have 3.73. Will this cause an issue with shifting of the transmission if I don't change it right away? I would prefer to find a matching OS 4L80e with 3.73 gears but seems to be only 2 trucks there.