Difference between the TCM for 6.5L turbo and non-turbo NA?

[Malo7]

Apologies for redundancy if this has been asked hundreds of times but I didn’t find a thread on it yet.
here it goes:
Is there a difference in TCM part numbers for the 6.5L turbo and the non-turbo NA?
I’m swapping out to a 4L80E. Have everything but the TCM so need to know if I should believe the eBay vendor telling me it doesn’t matter. He’s got one listed for the turbo NSN and said it will work on my non turbo.
Any help is appreciated.
thank you.

 

[Coug]

Yes, they are different part numbers
Only difference is the shift points. The turbo version has a little higher shift points, to deal with the slightly lower diff gearing and increased truck weight.

also, check out this thread

Looking for help with 4L80E transmission on an M1123 HMMWV

I am a 15 year old in the state of Idaho who recently bought an M1123 HMMWV through GovPlanet. It has been depo reset in 2015 and has 3.5 miles on it. It did not come with a TCM, but I bought one from Austin on eBay. It has 12V power going to the module and is not shifting at all. Looking for...

www.steelsoldiers.com

 

[Mogman]

Apologies for redundancy if this has been asked hundreds of times but I didn’t find a thread on it yet.
here it goes:
Is there a difference in TCM part numbers for the 6.5L turbo and the non-turbo NA?
I’m swapping out to a 4L80E. Have everything but the TCM so need to know if I should believe the eBay vendor telling me it doesn’t matter. He’s got one listed for the turbo NSN and said it will work on my non turbo.
Any help is appreciated.
thank you.

Welcome to the SS forums!!!

 

[Malo7]

Yes, they are different part numbers
Only difference is the shift points. The turbo version has a little higher shift points, to deal with the slightly lower diff gearing and increased truck weight.

also, check out this thread

Looking for help with 4L80E transmission on an M1123 HMMWV

I am a 15 year old in the state of Idaho who recently bought an M1123 HMMWV through GovPlanet. It has been depo reset in 2015 and has 3.5 miles on it. It did not come with a TCM, but I bought one from Austin on eBay. It has 12V power going to the module and is not shifting at all. Looking for...

www.steelsoldiers.com

Thank you for the info.
so if I understand that correctly, using a TCM programmed for a turbo will shift at higher rpm than necessary for my lighter M1097R1.
I’m not a mechanical wiz but I’m guessing that’s like over throttling my roadglide before shifting gears. Kinda wastes fuel and increases wear if I’m not mistaken.
Am I understanding that right?
The donor HMMWV I got the tranny from is a non Turbo but looks like it had armor on it at some point. Can’t verify because it doesn’t have a dada plate. Not sure what model it was. Definitely a USMC slant back but that’s all I have.

 

[Mogman]

Thank you for the info.
so if I understand that correctly, using a TCM programmed for a turbo will shift at higher rpm than necessary for my lighter M1097R1.
I’m not a mechanical wiz but I’m guessing that’s like over throttling my roadglide before shifting gears. Kinda wastes fuel and increases wear if I’m not mistaken.
Am I understanding that right?
The donor HMMWV I got the tranny from is a non Turbo but looks like it had armor on it at some point. Can’t verify because it doesn’t have a dada plate. Not sure what model it was. Definitely a USMC slant back but that’s all I have.

You can "tune" any of them to some extent buy changing the position of the TPS

 

[Malo7]

Welcome to the SS forums!!!

Thank you!