I have a 48RE in my 2006, 2500 CTD and it is having shift issues. The two pressure sensors/switches known to be the most common issue were replaced but that did not fix it. My local shop is quoting $5500 for R&R with a rebuilt unit but one having improved components. I see lots of information on the web about the stock transmission being the weak link on these trucks, but that rebuilt and "re-manufactured" units are much improved. I also see some of these come with a large price tag and seem specially designed for trucks that have been juiced up for power. My truck is stock with no plans to chip or otherwise modify. I tow a 25' TT that weighs ~6200 loaded. Like to hear from anyone who has had to replace their original 48RE; what option did you choose and cost.