Tumbleweed79 wrote:
DW-gray wrote:
Tumbleweed79 wrote:
DW-gray wrote:
Tumbleweed79 wrote:
Though no one answered my question directly, I tried the app and it says that with a 2007 Chevrolet 2500 HD 6.6L LBZ, I can tow 1,700 lbs with a 5th wheel. I tried it three or four times.
Wow! I am WAAAYYY over that! ;)
It looks the the GCWR for your truck is 22,000. What is the GVWR and your GVW and any additional weight?
GVWR: 9,200 lbs., GVW: w/o passengers with full fuel (100 gal.) 8,180, 420 lbs. of passengers, Rear Axle: 4,000 lbs., Front Axle: 4,200 lbs.
I don't carry it full of fuel, but that was what I weighed it when I was pulling the Bumper pull. 70 gallons is about what I will fill it up when I hit a truck stop.
I ran your numbers: GCWR - 22000, GVWR - 9200, GVW - 8180, Passengers - 420
With 5th wheel checked, max 5th wheel tow: 2000
Without 5th wheel checked, max 5th wheel tow: 3000
How well does your truck tow the 5th wheel going up a 3-5% grade? I suspect the truck's GVWR and rear GAWR is well overloaded. I'm fascinated. Maybe we should continue this conversation via PM.
I know what the calculator says and it makes NO SENSE. :-) Grades can slow it down, like any unit, but there is not really a limit on how fast I can go if I pour the coal on. The hardest pull I had was coming out of Salt Lake City basin headed north. Though I don't have an EGT probe, I know I was pretty hot. Yet, even then I didn't have a problem maintaining 60-65 mph. I am not chipped, but do have aftermarket air intake and a aftermarket exhaust. I have pulled over the Rockies twice with no problems.
Yes, it is likely the GVWR and GAWR is overloaded. Next time I pull I am going to hit a scale like I did when we pulled our Travel trailer.
The calculator computes tow capacity on the available payload of the vehicle to avoid exceeding the GVWR.
GVWR - GVW - Additional cargo = Available payload
Your truck's available payload is 600 pounds. Calculating towing capacity with 20% PW comes out to be 3000 pounds. If the PW was kept down to 15%, the truck could tow, without exceeding ratings, 4000 pounds.
If the towing capacity was calculated with the standard method that has been used for years, the dealer would tell you that the truck could tow 13,400 pounds. (GCWR - GVW = Towing Capacity) The potential PW @20% would be 2,680 pounds.
2,680 + (rear GAW) 4,000 = 6,680 pounds on the rear axle. How much is that over your truck's rear GAWR?
6,680 + (front GAW) 4,200 = 10,880 pounds. That exceeds the GVWR by 1,680 pounds.
