3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
They should get you at least 100k miles unless you're hauling or on rough roads all the time. After 100,00k it's up to Murphy. I have been stranded before which has made me big on preventative maintenance. If you have the cash and time, I'd go for it. 100k is a time to just replace all the suspension bushings, ball joints, struts, etc., then go get an alignment and be good for another 75k on the components at least.