ECM and 4wd to 2wd swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67pete300 · 03-30-2018, 11:15 AM

I'm looking for an entire donor vehicle (nominally LM7/4L60e) for my 65 C10.

There are many more 4x4 vehicles out there and in my price range are higher mileage that probably need a trans rebuild anyway.

I've read about trying to get compatible engines and transmissions, but why can't I just buy a 4x4 donor vehicle and trade the 4wd 4L60 in for a rebuilt 2wd version?

Does this present compatibility issues that can or cannot be fixed with the ECM reflash?

Ultimately this is the same question I guess for just buying a standalone engine and trying to find the correct transmission to mate up.

I'm not interested in converting the 4x4 transmission to 2wd.

Wildkarde · 03-31-2018, 01:43 AM

Any competent tuner can tune a 4wd computer to run a 2wd trans. This becomes alot more complicated but still possible if one trans is a 4l80 and the other a 4l60 though.

BR3W CITY · 03-31-2018, 03:07 AM

If your just swapping a 4wd 4l60e for a 2wd 4l60e from the same year range, its just a a matter of changing the ECM settings.

67pete300 · 03-31-2018, 08:59 PM

Thank you.

Talking to a guy with a 2004 2wd 4.8/4L60 with 250k miles. Not ideal but really cheap for the whole truck.

03-30-2018, 11:15 AM	#1
67pete300 Registered User Join Date: Mar 2008 Location: Burke, VA Posts: 114	ECM and 4wd to 2wd swap I'm looking for an entire donor vehicle (nominally LM7/4L60e) for my 65 C10. There are many more 4x4 vehicles out there and in my price range are higher mileage that probably need a trans rebuild anyway. I've read about trying to get compatible engines and transmissions, but why can't I just buy a 4x4 donor vehicle and trade the 4wd 4L60 in for a rebuilt 2wd version? Does this present compatibility issues that can or cannot be fixed with the ECM reflash? Ultimately this is the same question I guess for just buying a standalone engine and trying to find the correct transmission to mate up. I'm not interested in converting the 4x4 transmission to 2wd.

03-31-2018, 01:43 AM	#2
Wildkarde Registered User Join Date: Mar 2018 Location: Ardmore Posts: 100	Re: ECM and 4wd to 2wd swap Any competent tuner can tune a 4wd computer to run a 2wd trans. This becomes alot more complicated but still possible if one trans is a 4l80 and the other a 4l60 though.

03-31-2018, 03:07 AM	#3
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: ECM and 4wd to 2wd swap If your just swapping a 4wd 4l60e for a 2wd 4l60e from the same year range, its just a a matter of changing the ECM settings. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

03-31-2018, 08:59 PM	#4
67pete300 Registered User Join Date: Mar 2008 Location: Burke, VA Posts: 114	Re: ECM and 4wd to 2wd swap Thank you. Talking to a guy with a 2004 2wd 4.8/4L60 with 250k miles. Not ideal but really cheap for the whole truck.



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