RE: 5.7 Hemi No Posi Traction?!
Actually Dodge doesn't refer to it as posi-track but Anti-Spin Differential Rear Axle, an option offered for $285.00. My 2004 Ram had it but my 2006 does not. Because I don't do a lot of towing I hardly notice a difference.
What I do remember is on the 2004 when the roads were wet, taking off from a stop no matter how gentle on the accelerator both rear tires would spin. It was an art taking off in damp situations without spinning the the rear wheels.
In my new HEMI I can't blame the lack of a Anti-Spin Differential Rear Axle for not spinning in wet weather. For 2006 Dodge mellowed the accelerator a bit to prevent this from happening and thus far, I'm happy with their decision.
The only drawback I see with having the Anti-Spin Differential Rear Axle is the requirement for a special additive to the differential synthetic oil when it's due for change every 15,000 miles. (How ridiculous). That's one area where Ford and Chevy had their heads on straight. They don’t require changing the fluid for 100,000 miles.
Being at the ripe age of 48 I can say I’ve owned more than my fair share of Dodge, Chevy and Ford trucks. At the current time I prefer the Dodge trucks hands-down over Ford and Chevy, however that being said I also claim the Ram is the most high-maintenance truck between the big three. This is because of the lower maintenance intervals called out in the owners manual i.e. fluid changes, spark plug changes, capacities, etc.