5.9 Cummins Diesel Towing capacity
My owners manual tells me the max pin weight is 1200 and the 5vr (2007 Arctic Fox 27 ft) has pin weight of 1500lbs. On top of that the trailer is max of 12000 and the truck is rated at 9600lbs approxi...
Forum Discussion
Grit dog wrote:
^ Correct, a modified valve body and a lock up switch are required for any more than 3rd and 4th gear lockup.
Seeing you have 3.55 gears as well, stock 03 power and 47re trans ratios are not a very good combo power or gearing wise for heavier towing. When towing, I'd run the smallest tires you can put on it with adequate capacity. Like 245 75 16s, re-gearing is expensive. Power is low, so gears or a tune are the easiest power solutions for moderately more power. If your tans is built a little bit, tow tune will do wonders, for 1/4 the cost of gears.
Synopsis for towing 12k+ high profile like a boss and not getting killed on the uphill runs.
-Tune
-Built trans
-VB and lockup switch
-Little tires
Add an exhaust brake, only if you have a manual lock up switch and only in the gears that it will lock in.
Bottom line, assuming your trans is stout enough to handle a little power and e brake, you have some work to do to get it to tow anything like a newer truck.
Only about $1200 in parts for a cheap tuner and a VB/switch if you do the work yourself, otherwise closer to $2k.
Exh brake, $1200 diy, over $1500 installed.
Tires...however much they cost.
I was going to say my BIL had the same truck, it was no power house towing his 12000lbs trailer. You need modifications and a good transmission cooler.
You are what 235HP and 460Ft/lbs of torque? How do you expect it to tow that much weight with a 4 speed and those gears? You could get out of the go pedal a bit. I ended up putting a Tru cool 40k in his truck and no more over heating, but there were plenty of times where he would slow down on hills. He worked for the carnival with that truck for years, and with the cooler and rebuilt trans it was really reliable.
