My 12 Ram 2500 had a goofy TBC from the get go. I had it replaced under warranty in the 1st 2 weeks. The dealer had to buy a special plug that they stick in the trucks 7 pin plug to see if the TBC was working right. Even the new one was goofy. So I bought a cheap Tekonsha Primus IQ. It works like it should. Brakes can lock up if the gains set to high.
I know it's not the trailer brakes because on a previous TT with a different truck 10 F150)that had a built in TBC the TT brakes worked flawless. Then when I hooked up the Ram they didn't work as well. Also our current 5th wheel doesn't work as well either.
I was at the dealer getting some stuff checked out on the Ram and they said they had a TBC re-flash that I hadn't had yet. So I got it done.
Will be heading out this weekend for our 1st trip of the year. I will get a chance to try the re-flash.
One thing I have noticed is that the Rams TBC seems to work a bit differently. I can't set it up like you normally would. However I have switched back and forth on occasion to try some ides. Anyway, when it's set on 5.5-6.5 gain on light electric and you slide the manual lever over it won't feel like you have much for braking. But if you're driving down the road and slam the brakes like you're in a panic stop they will lock up. So I don't know what type of braking parameters Ram is using, but they're not the same as Fords.
