Allison 2000 ID

[Rogue1bus]

Originally Posted by cadillackid

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 I’m still learning the names and nomenclature for bus stuff.

[cadillackid]

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

[Rogue1bus]

Originally Posted by cadillackid

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 won’t be drivable till it’s reprogrammed.. maybe I can remove the ECM it self and bring it to the dealership [emoji848]...

[cadillackid]

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?

[Rogue1bus]

Originally Posted by cadillackid

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 I’m not certain and I don’t have it in my hands yet.

Also their supposed to going to pull the shifting control buttons... I have the lever which I don’t think will work...

[cadillackid]

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..

[Rogue1bus]

This is the TCM.

6speed?

[cadillackid]

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

[Rogue1bus]

Originally Posted by cadillackid

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

I’m fine with 5speeds. Final gear ratio of .74?

[Rogue1bus]

Originally Posted by cadillackid

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..

[Rogue1bus]

It looks like my 545 shifter may work...
Here is the actual gear ratios and technical data I found on the wiring harnesses.

Which harness was the difficult one to get? The vehicle one or the transmission one.?

Link to the full tech pub.
http://shop.ukrtrans.biz/wp-content/...gs/ALLISON.pdf

[Rogue1bus]

Originally Posted by Kubla

It will NOT be plug and play, you will need the wiring harness for the 2000 series transmission, which cost me $750 to have made, hopefully the vehicle the transmission came out of is still around and they did not destroy the old harness getting it out

The yard pulled the harnesses to today and they are giving me the ECM from the engine in too. So I should end up with both wiring harnesses and the TCM and EMC from the donor bus.

Does anyone know where/how the drivetrain is reversed in my RE bus vs a dog noise bus? The donor bus was a FE bus and mine is a RE.. any issues I should know about with opposite drive train?

Can I plug the donor ECM in an ride?

Thanks for all the help. There is no way I’d undertake this project without the wealth of knowledge and help from you all[emoji3590].

[PNW_Steve]

Oh No Rogue!!

Didn't anyone warn you? If you put an FE TCM in a RE bus you will be stuck with one forward gear and five reverse gears!





OK.... Kidding

[Rogue1bus]

Originally Posted by Kubla

It is going to cost, just the plug ends you need will be several hundred dollars, I saved about 100 dollars because I had the yellow and red plugs for the TCU because the scrap yard cut the harness instead of figuring out how to unplug them, there is also a big round plug that goes into the transmission plus about 4 small ones on the trans, at least one to the engine ECU, diagnostic port to the inside of the bus, another for trans temp gauge if you want one. I bought my 2000 series before I found out about the wiring harness, if I had known that the harness was going to cost more than the transmission I probably have done an axle ratio swap instead

Where did you get your missing cables?

I have the transmission harness (pretty sure) and the engine wiring harness with ECM but not the part that actually plugs into the TCM [emoji2959]. I’m going with my scrap guy to the donor bus tomorrow to try and find the missing cables[emoji1696].

[peakbus]

Originally Posted by Rogue1bus

I’m going with my scrap guy to the donor bus tomorrow to try and find the missing cables[emoji1696].

Where is this scrap yard? Sound like a dream. I would like to undertake the same project (same engine but other end) and am looking for a source.

[Rogue1bus]

Originally Posted by peakbus

Where is this scrap yard? Sound like a dream. I would like to undertake the same project (same engine but other end) and am looking for a source.

I’ll going start a fresh thread on the actual swap once I think I have the basic parts to start the swap and then do a write up on my blog once I get it successfully completed.

[Rogue1bus]

Originally Posted by peakbus

Where is this scrap yard? Sound like a dream. I would like to undertake the same project (same engine but other end) and am looking for a source.

Chesapeake and Newport News va

[Rogue1bus]

Update: the scrap yard destroyed the bus with the correct wiring harness (melted post monster truck...)

I went to try and get one off another bus with supposedly the same drive train today. No dice, the other donor bus was either a 545 or 643..[emoji2959]. So I have an Allison 2000 gen 3 transmission and TCM but no wiring harness...

[PNW_Steve]

Is this the correct item?

https://cobratransmission.com/alliso...xoCCtwQAvD_BwE

[Rogue1bus]

Originally Posted by PNW_Steve

Is this the correct item?

https://cobratransmission.com/alliso...xoCCtwQAvD_BwE

No that is the transmission side I need the gen 3 TCM side. I mean I may need that also but I have nothing that connects to the TCM.