Manual to Auto swap, yes to an auto lol - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jakezed22 · 09-04-2021, 04:40 PM

Hey ive read about alll i can find on going from a manual TO an automatic. but it seems that the key peice of info im looking for is often left out or not posted.

My question lyes with BCM programming. Does it need a BCM from an auto or programmed for an auto?

My driveline is a LML duramax followed by a 6l90e, the 6l90e is running a t43 from a 2015 van. Im wired up and not getting the starter relay activated by the ECM. Can bus signals are the same across the platforms of these years so i dont think its that, i just need to confirm if the BCM needs programmed to an AUTO file for it to see the PRND selction and send the crank request to the ECM.

My car is a factory 2014 SS with manual.

Thanks, Jake

67-LS1 · 10-04-2021, 06:59 AM

I don’t have an answer other than to say when I swapped my engine/trans into my 66 I didn’t even include the BCM. I just run the ECM.
And nothing LOL about swapping a manual to an auto. I love a manual trans but with today’s traffic an auto for a daily driver is the way to go (for me anyway).

cawengr · 10-04-2021, 11:25 AM

You probably need the BCM re-programmed. The one thing that can stop the starter from engaging is the clutch depressed signal which you now don't have. If you jumper the clutch switch you will probably lose any cruise control as the cruise de-energizes when the clutch is depressed

09-04-2021, 04:40 PM	#1
Jakezed22 Drives: 2014 2SS Camaro Join Date: Jul 2016 Location: Manitoba, canada Posts: 22	Manual to Auto swap, yes to an auto lol Hey ive read about alll i can find on going from a manual TO an automatic. but it seems that the key peice of info im looking for is often left out or not posted. My question lyes with BCM programming. Does it need a BCM from an auto or programmed for an auto? My driveline is a LML duramax followed by a 6l90e, the 6l90e is running a t43 from a 2015 van. Im wired up and not getting the starter relay activated by the ECM. Can bus signals are the same across the platforms of these years so i dont think its that, i just need to confirm if the BCM needs programmed to an AUTO file for it to see the PRND selction and send the crank request to the ECM. My car is a factory 2014 SS with manual. Thanks, Jake

10-04-2021, 06:59 AM	#2
67-LS1 Drives: 1966 Chevelle Join Date: Oct 2013 Location: Northern California Posts: 141	I don’t have an answer other than to say when I swapped my engine/trans into my 66 I didn’t even include the BCM. I just run the ECM. And nothing LOL about swapping a manual to an auto. I love a manual trans but with today’s traffic an auto for a daily driver is the way to go (for me anyway). __________________ 66 Chevelle with 2013 LFX V6, 6 speed auto, full Hotchkis suspension, Wilwood 4 wheel discs.

10-04-2021, 11:25 AM	#3
cawengr Drives: Classy Join Date: Apr 2017 Location: Illinois Posts: 37	You probably need the BCM re-programmed. The one thing that can stop the starter from engaging is the clutch depressed signal which you now don't have. If you jumper the clutch switch you will probably lose any cruise control as the cruise de-energizes when the clutch is depressed