As Clifford says, the picture is of your speedometer adapter housing. Your Transmission is an Allison MT654. Not a hard job to work on the modulator. Bring it up here when you come this way... we can adjust it.
Hello Dallas, Your in Franklin correct? I called Inland in Dallas but that is a long way. I also didn't feel very comfortable with the service guy on the telephone. He kept selling me on droping the tranny pan to inspect the debri in the pan and started talking about the price of a rebuild on a tranny. I just thought that was a little out of ordinary to talk about how much a rebuild is when I am calling about adjusting a modulator.
I will be headed to Franklin on or around the 20th of November. Let me know where your at and maybe I can jet up. My problem is my on call schedule. I am on call for 2 weeks and then off for two weeks. I just came off of a 3 week on call and am a little stir crazy. We are headed to Sommerville this weekend.
+2 on a great group of folks on this site.