I have a 01 Pathfinder 4x4 5spd SE... what can I do to get my tow rating up to 5000lbs? I assume the autos have a slightly higher rating due the trans cooler, but would springs/shocks in the back give it some more capacity on top of adding a cooler?

I guess brakes are factored in there as well, but if someone could shine some light on this I would appreciate it. I need to tow my 240 up here by the end of the year... might have to borrow an Armada from work if I can't get my Pathfinder ready...