Apr-11-2015 05:33 AM
Apr-13-2015 06:32 AM
Apr-13-2015 06:24 AM
Apr-12-2015 06:09 PM
JIMNLIN wrote:
They offer a 11200 GVWR or a 10000 GVWR for the exact same configured truck/same GAWRs/same engine and tranny /same frame/same brake specs/same tire and wheel packages/etc ,just a different GVWR numbers.
Apr-12-2015 06:02 PM
it is a simple thing to upgrade your F-150 to a F-450, simply change out the rear axle.
Apr-12-2015 02:15 PM
Apr-12-2015 12:42 PM
KevinO wrote:
That is 7640lbs total which leaves me 2260lbs for payload. but according to the scale slip I still have 3830lbs available on my rear axle...
Apr-11-2015 08:31 PM
Apr-11-2015 07:36 PM
Atlee wrote:
Why doesn't the Gross Vehicle Weight Rating equal the Gross Axle Weight Rating for the front and rear axle?
Take my F150 (heavy) pickup for example. The FGAWR = 4,050#. The RGAWR = 4,800#. Yet the GVWR = 8,200#. Why shouldn't the GVWR = 8,850#?
Apr-11-2015 07:29 PM
Apr-11-2015 05:36 PM
Apr-11-2015 04:21 PM
donn0128 wrote:
"The Gross Axle Weight Rating (GAWR) is the maximum weight that the designated axle system is designed to carry. It is set by the OEM and noted on the vehicle's original certification label. Again INCORRECT! The axle ratingnis specified by the axles manufacturer. They design and specifiy the rating of that single component. The body builder specifies the vehicles GVWR based on factors, among them I spelled out earlier.Alterers must determine whether their modifications affect the manufacturer's stated GVWR or GAWR. If they do, the alterer must specify the new GVWR or GAWR on the alterer's certification label (see 49 CFR 567.7). Note: A modifier or dealer should never accept an altered vehicle that does not have an alterer's certification label."
http://www.nhtsa.gov/cars/rules/adaptive/Inoper/Fre_ask_Ques.htm
Apr-11-2015 03:37 PM
Apr-11-2015 02:51 PM
Atlee wrote:
Why doesn't the Gross Vehicle Weight Rating equal the Gross Axle Weight Rating for the front and rear axle?
Apr-11-2015 02:49 PM
ShinerBock wrote:donn0128 wrote:
GAWR is the weight rating for one single component the axle.
This is false. The GAWR is defined by the NHTSA and DOT to be the measure of the limit of the axle system which includes suspension and tires. It is not just what the axle itself can handleSorry, INCORRECT! As an example, my truck has an 11.5K rear axle, but the tires are only rated for 10K. 2500 series trucks can have axle ratings around 10K and carry from the factory 6000 pound rated tires.
"The Gross Axle Weight Rating (GAWR) is the maximum weight that the designated axle system is designed to carry. It is set by the OEM and noted on the vehicle's original certification label. Again INCORRECT! The axle ratingnis specified by the axles manufacturer. They design and specifiy the rating of that single component. The body builder specifies the vehicles GVWR based on factors, among them I spelled out earlier.Alterers must determine whether their modifications affect the manufacturer's stated GVWR or GAWR. If they do, the alterer must specify the new GVWR or GAWR on the alterer's certification label (see 49 CFR 567.7). Note: A modifier or dealer should never accept an altered vehicle that does not have an alterer's certification label."
http://www.nhtsa.gov/cars/rules/adaptive/Inoper/Fre_ask_Ques.htm
"GAWR (Gross Axle Weight Rating) – The GAWR is the value specified by the vehicle manufacturer as the load-carrying capacity of a single axle system. Each axle on a truck (and trailer) has a maximum allowable weight capacity. As previously noted, the GVWR of a truck is usually less than the combined GAWRs of all of a truck’s axles. The GAWR is limited by the weakest link in the axle system which also includes the suspension and the tires. For example, an axle with a design rating of 21,000 pounds may be rated lower due to the rating of the selected suspension (springs) or tires. When calculating the design load on an axle, make sure to take into account any weight transferred to the axle from a trailer (tongue weight) and the potential placement of cargo."
https://www.ntea.com/content.aspx?id=20194
If the GAWR set on manufactured trucks was just the axle, then the 11.5" AAM axle in my truck would have a GAWR of it's rated 10,000 lbs instead of its axle system rating of 6,500 lbs.
http://en.wikipedia.org/wiki/10.5%22_Corporate_14_Bolt_Differential#11.5_AAM
Apr-11-2015 10:51 AM