LBZ TCM Tune

[Sydo]

Hi I have a Nissan GU Patrol Duramax LBZ conversion with Allison 6sp
I have the T14A TCM can this be tuned ?
Just making sure this is correct TCM part number 24256864

[Sydo]

Or is A40 better TCM ?

[Cougar281]

I don't know that there are any calibrations for a T14 and LBZ.... Could be, I suppose. But A40 is a safer bet for calibrations for a LBZ.

[Sydo]

I don't know that there are any calibrations for a T14 and LBZ.... Could be, I suppose. But A40 is a safer bet for calibrations for a LBZ.

T14A. T14 is equivalent to A50 TCM Cheers

[Cougar281]

T14A. T14 is equivalent to A50 TCM Cheers

Well, yes, the A40, A50 and T15 are all 'basically' the same, but they may never have made a calibration for the T14 for it to work right with an E36A/LBZ ECM. The LBZ only ever had the A40 as far as I know, the A50 came out for late LMM or early LML, and then the T14 came out, before being replaced with the T87 in the 2015.5 LML.

Now if that T14 came with the LBZ and has the proper calibration to work with the E35A, then just roll with it.

Edit: it does look like there is a LBZ calibration for that 24256864 hardware, so if it has the right calibration in it. (Or if it doesn't and you can program it), I'd just roll with it.

[Sydo]

Well, yes, the A40, A50 and T15 are all 'basically' the same, but they may never have made a calibration for the T14 for it to work right with an E36A/LBZ ECM. The LBZ only ever had the A40 as far as I know, the A50 came out for late LMM or early LML, and then the T14 came out, before being replaced with the T87 in the 2015.5 LML.

Now if that T14 came with the LBZ and has the proper calibration to work with the E35A, then just roll with it.

Edit: it does look like there is a LBZ calibration for that 24256864 hardware, so if it has the right calibration in it. (Or if it doesn't and you can program it), I'd just roll with it.

Thanks mate. Just got this reply from EFI Live

[Cougar281]

Keep in mind that generally, there isn't much to be gained by tuning the Allison TCM. Other than maybe changing shift points, the consensus I've gathered over the years from those more knowledge than me in tuning is to leave the TCM alone.

[Sydo]

Keep in mind that generally, there isn't much to be gained by tuning the Allison TCM. Other than maybe changing shift points, the consensus I've gathered over the years from those more knowledge than me in tuning is to leave the TCM alone.

Just found out when I plugged in scan tool comes up with 2009 LMM Sierra ECM and I have a LBZ Engine