Allison 1000 TCM

[EBramwell]

Does anyone know of a standalone TCM made for the Allison 1000? I'd like to mount one in my old truck but the Allison is all computer controlled.

 

[cjohnson1]

I found out that Allison manufactures them for their test stands. But they are not selling them to the public, YET!

I'm still looking for an enterprising computer geek who can build one for me. If he can build one he can build 100. Right?

Anybody got a schematic?

Keep us posted if you come across a scource.



Curtis J

 

[Brayden]

Yeah I've got the pinouts. .



Hey CJohnson... You read my post on POR?



Little known fact here:



Allison TCM's are available to the public. Allison calibrations could be bought at any distributor. You can buy the TCM through the distributor. Get ready to spend a grand. . plus 350-500 per calibration.



I know that the chick on POR is a tech for S&S, and you can use her for info. . Not knocking her, but I worked @ Allison's World Headquarters in Indianapolis.



I Know for a fact. You DON'T need a test stand calibration. There are calibrations out there for cummins motors. When I worked in the service dept, I could take any software level, any calibration, and put it on the eddy current dyno, and test it. The only inputs the TCM saw, were throttle position and range selection from the NSBU switch. You don't have to have a connection to the 1939 backbone for the trans to operate.



The main reason that allison's uses the serial communication between engine & trans, is for torque management purposes.

The engine actually reduces power between shifts, to save the transmission. This is not the only reason. . Since the new engines are fly by wire, it's much easier to use a digital TPS signal over the 1939/1850 backbone vs an analog signal from a TPS sensor.



Our test stand in the dyno room had a TPS attached to the dyno's throttle lever. . No standalone computers. . No magic boxes. . no voodoo magic. It's simple electronics. The Allison TCM doesn't care where the signal comes from, as long as it knows TPS & range selection.



I'm working on a swap right now. . I'll take pics & document it all. . including software levels, calibration & everything. . guess somebody's got to prove it for people to listen.



I'll keep y'all posted.

 

[cjohnson1]

Too cool Brayden, I'm glad sombody knows what they're talking about. I sure don't, but, I'm learning everyday.

Yea, document this and keep us posted. Somebody stands to make a lot of money on the side making a stand alone harness system for these transmissions. I'm all for that. I would love to use the 1000. But, for now I'm going to run what I got. Gottasave up my dead presidents again after this thing gets running again.



Side note: I'm going over everything and checking it twice. WIll put a battery on it this Saturday (yea I've said this before but now I mean it) and see if I can make some smoke. Only thing I haven't got are the Boost, manifold temp gauges and exhaust brake. Haven't come in yet. Leave it to me to order some "SPECIAL" gauges.

Thinking about having a "Lets Start this Sucker Up party".



Curtis J