Quote Originally Posted by gbaumann View Post
Feel free, everyone, to call me Gary. (Or anything else you'd like.) When I made the hardware changes and installed the new tune my power started coming on higher in the RPM range as you surmise. Auto trans shifts worse. Surging is much, much better but not 100% gone. No word back from Magnuson. Does anyone know what manufacturer of our transmission control unit in the PCM? I need that info for Aringtron Performance and they may be able to help us remotely.
Can't answer your question about who manufactures the auto TCU. It would be nice if Magnuson would at least let someone know if they are still trying to resolve the issues or if they are considering this latest attempt as "good enough". As I mentioned in a previous post, I haven't driven my jeep in over a week. I drove it yesterday and in addition to the shifting issues with the transmission, I happened to notice the slight surging that you mentioned. I hadn't noticed it before because I was so concerned about trying to keep my transmission shifting properly. Now that I know what to expect from the transmission, I was driving at about 65-70 mph and noticed the engine surging slightly. It feels like the bypass is trying to determine if the engine should be running without boost and then changes its mind and adds boost, then it decides not to add boost and the cycle continues over and over. It is like I'm slightly playing with the throttle by pressing the gas pedal down and then letting it back up.

I like the power that the SC has added, but if it weren't such a pain to uninstall it, I'd remove it and return it back to Magnuson or at least put my engine back to stock so it drives "normal" until the issues get resolved. I noticed Magnuson post on their FB page that they are installing an SC in a new jeep with an auto. They are going to publish the dyno numbers. It will be interesting if we get a new tune after they work on this jeep. I hope we do.

Do the people running the Magnuson with a standard transmission have any surging issues?