5 ton Allison MT654CR (MT600) series troubleshooting guide needed...service manual?

[actionpaintball]

I found some generic testing online. I am looking for a more in depth manual or trouble shooting guide that might break down the testing of the valve body and pressure diagnostics. I have a very clean transmission in a M923A2 that had some weird issues I would like to attempt to shake down prior to a rebuild. Any help is appreciated.

 

[quickfarms]

The mechanics tips are available on the Allison web site. You can also by the manuals from Allison.

What are your issues?

 

[actionpaintball]

Tranmission will temporarily work in all forward gears and reverse. Once it get to full operational temperature, it progressiveley gets sluggish and stops all together. It will road drive at 55/60 but feels like it is slipping. We are about to do a pressure port test, drop the pan and look at the valve body, and do a general inspection for metal...ect...just want to do my homework in advance. I did find this (too big to attach)...in addition to teh free Allison stuff on their website. Most of the good stuff they want to $ for, so I may have to pony up and buy some manuals.

 

[Clark19]

I am also looking for detail schematics or drawings for the M923A2 Allison Transmission (MT654CR) valve control body.
Where can I get that info?
Thnx,
Clark in California

 

[ladoublet]

is there a pdf manual available for the allison mt 654CR transmission?

 

[HDN]

The closest free PDF I could find was a service manual for transmissions up to the MT653. I have no idea what the difference is between the MT653 and MT654 besides the version number (the last digit in the model number). The MT654 might have some different component design or features that the MT653 might not have, so I'm not sure the manual I found would be a good idea to follow.

 

[ladoublet]

The closest free PDF I could find was a service manual for transmissions up to the MT653. I have no idea what the difference is between the MT653 and MT654 besides the version number (the last digit in the model number). The MT654 might have some different component design or features that the MT653 might not have, so I'm not sure the manual I found would be a good idea to follow.

The problem that I am having is that the engine dies as soon as I put the transmission in gear.

 

[HDN]

The last time someone had a problem like this, it was a fuel-related issue:

M923A2 Starts only with Ether, and stalls when put into gear

Hello All, This problem is outlined in a troubleshooting post I'm having online with a pay site to try to help me fix my problem. Here is a copy and past of much of the information. Please help if you have an ideas... Thanks! Hello, I have an 6CTA8.3 in my former... Hello, I have an 6CTA8.3 in...

www.steelsoldiers.com

The solution for this member's problem is in post #58. Your problem might have a different cause, but reading through that thread will give you some ideas about stuff to look for.