[loufish]

What is the difference between the BT and the non BT? Is there any big differences?

1. tow mirrors
2. Lower rear gear
3. Trans temp gauge
4. Factory install class IV hitch and all needed relays
5. Larger capacity battery...

 

[loufish]

On my '05, I have a class 4 hitch and the needed relays already installed. I also have the gears by virtue of the OR package. (same gears, correct?) The battery's also been changed.
The only things that seem to be missing are the mirrors and the temp guage.
So can I safely tow more than the non-BT limit of 6400#?

I would think so...I'm sure the factory OR tires are fine.
Try to keep out of 5th(OD) when towing heavy or on any grades/hills...and don't be afraid of 3500-3800 rpm up the hills.