Originally Posted by HemiLonestar
NAG-1 won't be a bolt in, since it is designed for the GC/LX/LC platforms, you would need a stand alone controller. Same thing with the SRT-10 auto, although that is the 48RE, not RFE (it's a diesel trans). Same situation with the 68RFE. I wonder if you could somehow get the programming and/or PCM from a newer Ram to control the 68 (possibility?). The top 2 545RFE trans builders that I have seen/heard of are Sharadon and ATS, these will be plug-n-play.
There's a new player at the top.... and the ATS 545 is a glorified purple paper weight.
They make excellent converters though