over on RAWR occassionally

howardwheeler wrote:
I have a 2012 F 350 Powerstroke SRW.

howardwheeler wrote:
I am under on the tire rating. Each is 3750 at 80 psi, which I run always. So I'll not sweat it since that puts the rear axle at 7500 lbs per the tires. I've been doing this for a year and a half with zero problems. No heat on the tires. I check them.

Must be one big 5er, should got a Dually!

While most will say you shouldn't exceed any rating, the tires on a SRW tends to set the axle rating. If you are safely with in the tire rating, then it is up to you.

I am under on the tire rating. Each is 3750 at 80 psi, which I run always. So I'll not sweat it since that puts the rear axle at 7500 lbs per the tires. I've been doing this for a year and a half with zero problems. No heat on the tires. I check them.

As long as you're not over the tire weight ratings... I'd run it!

The axle/housing itself (not posted by Ford) has a weight rating that approaches five-figures. You could always move something from the truck to the rear of the trailer, or from the front of the trailer to the rear.

As with anything, the more you load it the sooner it will wear out. You will reduce the life of the outer bearings, but their life is already being reduced due to the fact that you are carrying a load heavier than an empty truck bed.

I wouldn't sweat it one tiny bit!

If your talking RAWR from the door sticker, then here's not much you can do. However if your truck has a sister truck that can carry more i.e, 2500-3500, then some components may overlap and in theory you can add after market items to beef up the rear. But generally speaking if your truck is a 1/2 ton and you're over the RAWR from the door sticker then there's nothing you can do.

I was in a similar predicament with a 10 F150. I was sitting at 4,000 on the rear with a RAWR of 4050lbs. Being that heavy didn't help the towing any and I traded up to a 2500. Yes I was at the limit, and as far as weights were concerned I was not over but the truck was at max CCC, RAWR and GVW, while still being under GCVWR. Typical 1/2 ton.

What truck do you have?

I have a 2012 F 350 Powerstroke SRW.

Without knowing anything about your truck this is only a guess. Higher rated tires would certainly help most 25 series trucks take advantage of the full rating of their axle. Maybe an extra spring.

There is no action I know of to increase the RAWR, the long term affect cannot be known IMO. It may be nothing, accelerated wear, or catatrophic failure. Most likely somewhere in between those extremes. There are folks here who believe you can exceed any of the manufacturers ratings anytime you want to with no consequences, I am not one of them. They are rated capacities, not recommendations IMO.

I, twice a year, would load my quad in the back of my 1/2 ton truck along with towing my 5600 TT about 400 miles round trip each and I figured I was over the RAWR by at least 500 lbs each time. Soon after, I noticed a strange noise coming from the rear end, and about a year after we sold our TT, I had to replace the 3rd member due to worn out pinion bearings. I can't really say the bearings were caused by being over weight, but I would guess that it would be.
Ron

howardwheeler wrote:
I have reweighed my truck and fifth wheel setup fully loaded to the max of what I could reasonably expect to carry. I am not over my GVWR but am over by 400 lbs. on my rear axle. What remedial action could I take or, if I am stubborn, what would the long term effect be on the rear axle? We are talking about twice a year being in this situation for a few thousand miles.

So a little more info would be helpful.

Truck
GRAWR
GFAWR
GVWR
Tire load capacity.

Trailer
Make model and year
GVWR