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Old 02-07-2019, 10:56 AM   #21
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Originally Posted by cadillackid View Post
you'll need to repgoram the Navistar ECM transmission type from AT/MT to Allison MD. so that your dashboard speedometer works, cruise works, and you dont set error codes in the computer..


sounds like you got this project under control!. is the TCM a single connector TCM or a 2 connector?


if its single connector, its a 6 speed capable trans and TCM.
-Christopher


TCM? Sorry Iím still learning the names and nomenclature for bus stuff.
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Old 02-07-2019, 11:02 AM   #22
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the TCM is the Transmission Control Module.. the computer that runs the transmission... likely what you call the ECM..



the actual ECM for the engine is what will have to be programmed for the new transmission..



-Christopher
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Old 02-07-2019, 11:34 AM   #23
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the TCM is the Transmission Control Module.. the computer that runs the transmission... likely what you call the ECM..



the actual ECM for the engine is what will have to be programmed for the new transmission..



-Christopher


Thank you!

Now I have to figure out how to get the ECM reprogrammed... I have an international dealership close by. Maybe they can do it. Although the bus wonít be drivable till itís reprogrammed.. maybe I can remove the ECM it self and bring it to the dealership ...
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Old 02-07-2019, 12:00 PM   #24
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you can drive the bus wothout reprogramming the ECM,, it will set a few codes but wont hurt it.. ther J1939 CAN link is always active so the throttle info should be sent to the transmission.. I dont recommend this build without someone havinbg access to some type of scan tool to make sure the comm link from engine to trans comes online.. this is important as it is the throttle position... without good TPS the trans will shift extremely early and at low pressures or it may go into limp mode and not lock the converter in any gear..



if the J1939 link doesnt activate it should turn on the Check trans light. so make sure you wire that up from the harness.. you need to know if its on or not..



any idea what kind of bus it came out of and if the harness is coming out of the same bus?
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Old 02-07-2019, 12:37 PM   #25
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Originally Posted by cadillackid View Post
you can drive the bus wothout reprogramming the ECM,, it will set a few codes but wont hurt it.. ther J1939 CAN link is always active so the throttle info should be sent to the transmission.. I dont recommend this build without someone havinbg access to some type of scan tool to make sure the comm link from engine to trans comes online.. this is important as it is the throttle position... without good TPS the trans will shift extremely early and at low pressures or it may go into limp mode and not lock the converter in any gear..



if the J1939 link doesnt activate it should turn on the Check trans light. so make sure you wire that up from the harness.. you need to know if its on or not..



any idea what kind of bus it came out of and if the harness is coming out of the same bus?


The TCM is from the same bus as the transmission which had a t444e in it.

Supposedly the harness is coming out of a bus with the same drive train but Iím not certain and I donít have it in my hands yet.

Also their supposed to going to pull the shifting control buttons... I have the lever which I donít think will work...
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Old 02-07-2019, 01:11 PM   #26
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an allison 2000 with a pushbutton shifter? wonder if that has an air or electric operated linkage.. normally the Cable operated shifter that operates the 545 is what you use for a 2000.. the later ones can "tap shift" which is a computer limiting function for which gear to be in but still has the handle to go from Reverse to N to drive etc.. im interested to see what the shifter was on it..
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Old 02-07-2019, 01:12 PM   #27
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IMG_4158.jpg

This is the TCM.

6speed?
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Old 02-07-2019, 01:20 PM   #28
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Looks like a 5 speed gen 3, which makes sense if the bus the trans came out of had a T-444E, the 6 speed versions of the 2000s didnt come out till 2006..



its possible to convert a pre 06 2000 from 5 speed to 6 with the later TCM and a Valve body upgrade.. ($$$ and a bit of work)


-Christopher
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Old 02-07-2019, 01:33 PM   #29
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Looks like a 5 speed gen 3, which makes sense if the bus the trans came out of had a T-444E, the 6 speed versions of the 2000s didnt come out till 2006..



its possible to convert a pre 06 2000 from 5 speed to 6 with the later TCM and a Valve body upgrade.. ($$$ and a bit of work)


-Christopher


Iím fine with 5speeds. Final gear ratio of .74?
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Old 02-07-2019, 02:33 PM   #30
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Quote:
Originally Posted by cadillackid View Post
an allison 2000 with a pushbutton shifter? wonder if that has an air or electric operated linkage.. normally the Cable operated shifter that operates the 545 is what you use for a 2000.. the later ones can "tap shift" which is a computer limiting function for which gear to be in but still has the handle to go from Reverse to N to drive etc.. im interested to see what the shifter was on it..


So despite my 545 shifter being R-N-D-3-2 it may work? The 2000 has an extra gear and would be R-N-D-4-3....

Or perhaps the labeling would be wrong and it would read 3-2 but the actual gears would be 4-3..
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