My '05 Quad Cab with 4 speed auto and 3.7L is rated at 4450 lbs maximum trailer weight. The same configuration in an '06 is rated at 4900 lbs maximum trailer weight. Anyone know why?

 

They might have made a couple of adjustments to the newer engine, maybe a different gear ratio, newer tranny, etc.

 

I have an 06 with the 4speed and the trailer package. The 4900 pounds is only if you upgrade to the 3.92 gear ratio with the rear-slip differential. The 4 speed auto comes standard with the 3.55 GR (no rear-slip) and that's where you get the 4450 rating.

 

Thx. Yes, I do have the 3.55 GR. I do have the rear slip differential.

 

where do you find the gear ratio for your truck

 

My 2006 Dakota brochure lists the following Maximum Towing ratings for the 3.7L

Dak CC 4x2 --- 4,900 lb

Dak QC 4x2 --- 4,800 lb

Dak CC 4x4 --- 4,700 lb

Dak QC 4x4 --- 4,600 lb

"All specs are based on properly equiped vehicles."

I can not find any information regarding what is a properly equiped vehicle except I would assume it would have to have the towing package. Nothing indicates a Max Towing weight is dependent on the RER or inclusion of anti-spin.

The 4.7L and the 4.7L HO have the same max except for the CC 4x4 which has a 50# lower rating for the HO.

If someone has the data from 2005, we can compare.