I tow with the Air Lift 5000 and Helwig max tow sway bar on the rear end. The frame, engine/trans and drive line are the same as a 3500. The bags give your frame a third point of support, helping the leaf springs. Stay with in the max weight of the truck with the coach empty. The added equipment will take care of the extra weight. Always weigh your rig before a trip. The coach pin weight can be reduced by loading the rear of the coach. CHECK YOUR TIRE LOAD RATINGS!!!
The 2500 ram C.T.D. is the same truck as the 3500 C.T.D. EXCEPT for the over load spring leaf and frame brackets on the rear axle. As you can see in my sig, I have a similar setup with our Sanibel 3600. The needed changes to the truck are;
AirLift Ultimate 5000 air bags (I also installed the compressor kit )
Hellwig rear stabilizer bar for heavy towing (not the standard bar)
#74030017 AAM rear differential cover for the 11.5" axle
Trailer light circuit protector ( this is to protect the T.I.P.M. in your truck ) ( $2,000.00 repair to the truck if your trailer wiring shorts out )
Curt T-Connector ( so you can splice in the circuit protector to the T-Connector and then just plug in )CURT Manufacturing
2007 Dodge 2500 CTD 2W.D. short bed Weight
Truck weighed with 250 lb driver, Hellwig rear sway kit, Air Lift kit, Super Glide #2900
hitch and bed rail kit, 34gal. of diesel in fuel tank, stock tires rated 3,195 lbs @ 80 psi. each.
Air bags at 10 psi. Truck has stock suspension.
Factory weight rating on the drivers door;
Front GAWR = 4,750 lbs @ 50 psi front tire pressure
Rear GAWR = 6,010 lbs @ 70 psi rear tire pressure
GCWR = 20,000 lbs
Maximum combined weight rating = 2,472 lbs of cargo and passengers
Front = 4,060 lbs
Rear = 3,220 lbs
Total = 7,280 lbs
The weight capacity left is
Front = 690 lbs.
Rear = 2,790 lbs
The rim rating on the rear is 3,005 lbs. ( this is calculated from the service manual statement that
the max tire pressure on the door is the max rim weight rating ) (the front tire rims and suspension will
have a greater side load on them in a turn then the rear tire rims thus reducing the front rims weight rating )
Increasing the tire pressure does NOT increase the rim or suspension weight capacity in a turn.
The rear axle rim rating on the 3500 SRW increases to 3,100 lbs @ 75 psi each. This matches the
industry standard light truck tire inflation table for the inflation pressure of a 265/70R 17E Single Tire.
The rim rating statement looks to be a legal "C.Y.A." rating so no one can claim that they were misled
to think the axle or rim rating is higher than the GAWR on the door sticker.
Truck with Sanibel 3600 5th wheel coach, 2 men @ 250 lbs each and 28 gal. of fuel & 100 lbs of tools in back seat.
New Trail Air pin box installed, 1 full & one 1/4 - 30 lbs propane tanks and 300 lbs in front cargo hold of Sanibel.
Front = 4,220
Rear = 6,120
Trailer x2 axles = 10,640
Actual GCWR = 20,980
At the wheel well lip;
With out Sanibel
The rear height = 38 1/2" @ 10 psi
The front height = 34 1/2"
The rear height = 36" @ 40 psi.
The front height = 34"