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Ok, that makes sense then. Sounds like sometime since you bought yours and I bought mine, they added the speed sensor to the design. My TCU uses the speed sensor for shifting along with info from the RPM sensor and TPS and a bunch of other settings.

I wonder how yours is different than mine then? I don't have any issues with the RPM signal, I'm getting that off the CPS and it reads good. Your output speed shaft sensor is on your transfer case?

Well, one more update as I found out that in the event you need to use low lock, you are pretty much out of luck without manually shifting from 1st to 2nd and changing the calibration in the app. It appears that the SEN-01-1 pulse generator doesn't generate a signal until you reach about 9mph...

I thought I would update this thread now that I have been through this just in case it helps anyone in the future. Here are some notes. I had to make several phone calls to TCI to try to figure out how to make this work. I was disappointed in the level of support I got. First off, as I...

Thanks, I did reach out to him in a PM and he responded already. The guy that did the work on your truck isn't with him anymore but he did reach out and gave me a little info. I'm finding conflicting info for the geared hub ratio on a M998. If I need to add the diff and the geared hubs together...

I'm in the process of swapping in a 4L80E into my M998. I bought the EZ-TCU to be my controller. Lot's of threads of people having issues getting this set up. If you have gone through this, do you care to share your settings with those that might be doing this in the future, like me? I'm...