Why is gvwr lower than axle weight ratings?

[jon0m0berry]

So I'm looking at my truck (2019 ram 1500) and it's limits etc... and I noticed my gvwr is 7100lbs but both my axle rating together ar 8000lbs. I can't remember each axle exactly but I do know together they are 8000lbs. Does anyone know why there is a 900lbs difference? Is that just ram playing it safe because they know it's virtually impossible to perfectly max each axle to its limit? I'm not running Into issues just saw this and can't find anything on Google as to why it's like this.

 

[Farmer Fran]

Suspension

 

[Dinky]

So I'm looking at my truck (2019 ram 1500) and it's limits etc... and I noticed my gvwr is 7100lbs but both my axle rating together ar 8000lbs. I can't remember each axle exactly but I do know together they are 8000lbs. Does anyone know why there is a 900lbs difference? Is that just ram playing it safe because they know it's virtually impossible to perfectly max each axle to its limit? I'm not running Into issues just saw this and can't find anything on Google as to why it's like this.

Suspension, cab length, bed length, and vehicle equipment all play a factor. Same axels for all the 1500 just a difference on configuration.

 

[dhay13]

You can be at 7100lbs but be over your GRAWR so they have separate limits. If the truck is loaded towards the center of the truck then weight should be fairly well distributed meaning you are likely under on both axle limits but if you have a load of concrete blocks and all are back at the tailgate then that will increase the weight on the rear axle but you still may be under your 7100lbs.
If you are towing AND hauling at the same time you could easily exceed rear axle limits but possibly stay under 7100lbs. Probably not likely but I'm sure it's possible

 

[IvoryHemi]

Same axels for all the 1500

The Max Tow gets a bigger 256mm (10.0”) rear axle compared to the standard 235mm (9.25”) rear axle

 

[Dinky]

The Max Tow gets a bigger 256mm (10.0”) rear axle compared to the standard 235mm (9.25”) rear axle

well I believe that's the difference from classic to new generations 2019 is when the switched to 6 lug as well.
All trucks GAWR are the same for all builds.

https://www.ramtrucks.com/BodyBuilder/service/ViewSpecification?specificationId=961&fileName=2019_DT_Trailer%20Tow%20Master.pdf

 

[IvoryHemi]

well I believe that's the difference from classic to new generations 2019 is when the switched to 6 lug as well.
All trucks GAWR are the same for all builds.

https://www.ramtrucks.com/BodyBuilder/service/ViewSpecification?specificationId=961&fileName=2019_DT_Trailer%20Tow%20Master.pdf

I’m referring to the 5th Gen axles

 

[crazykid1994]

I’m referring to the 5th Gen axles

View attachment 485527

If I ever do a 6 lug conversion looks like I’ll be looking for a 5th gen rear axle instead of just swapping axle shafts. Good to know. Was unaware they actually had a different axle for the tow package.

 

[pacofortacos]

I don't even see the "max tow package" on the ram website ?

 

[IvoryHemi]

I don't even see the "max tow package" on the ram website ?

The only configuration it’s available on is 4x2 Quad Cab

 

[pacofortacos]

Well that explains it.
Is it heated/cooled by coolant like the standard axle on the 2WD?

 

[crazykid1994]

If I ever do a 6 lug conversion looks like I’ll be looking for a 5th gen rear axle instead of just swapping axle shafts. Good to know. Was unaware they actually had a different axle for the tow package.

Well. I guess it wouldn’t be a bad idea to do the 10” axle upgrade just for the strength of the larger gear set as that’s all it seems ram used it for. The actual axle capacity remains the same so payload does not change. Only the tow capacity changes for the max tow package and that’s also due to the e torque being part of the max tow package as well.

 

[Dinky]

The only configuration it’s available on is 4x2 Quad Cab

I read about it awhile ago I just figured it was the difference from 5 to 6 lug change. Thanks for the info.

 

[Dinky]

Well. I guess it wouldn’t be a bad idea to do the 10” axle upgrade

Yeah its seems to be that way. I would be interested to see what happens when you look up the vin of one of those trucks. My 2022 3500 the chart said my max towing said 17,600. I looked up my vin on their site and its 20,305 lol

 

[JF19Longhorn]

If I had to guess brakes, suspension, and a bit of a safety margin.

 

[Yarek]

Safety margin, sure, there is the concern about load distribution, it's true that axles are rated for whatever they are rated for. But there is also the fact that when you go up or down a steep hill, or get hard on the gas or brakes, there is weight transfer from one axle to the other. If both axles are maxed out, if there is any transfer, one of them will overload.

Now, how much of a concern that is? it depends. If you're Dodge, the concern is legal. They don't want to be sued for something going wrong because the truck was "at the limit". That said, if you're the owner, and you know you're pushing the truck past its design limits, you should know to take it easy and not drive through major potholes or speed bumps at full speed, or let the truck gain too much speed on long downhills etc... I have overloaded trucks many times in the past. Heck, I have overloaded my little Honda with long lumber and bagged soil (pre-RAM days), but I knew to take it extra easy and there has been no damage done.

 

[GTyankee]

9.25 rear differential is used only on the 1500s

All dimensions are in inches (millimeters) unless otherwise noted. All dimensions measured at ... AAM 11.5-in. beam rear axle (2500 and 3500 limited-slip,.
some 3500s have a 12 inch beam

Look at your Equipment Listing, it does not lie

FCA RAM

fcacommunity.force.com

 

[392DevilDog]

The 5th gen RAM 1500 offers a Dana Super 60 axle only available on 2wd models. Which is the other axle being talked about here.

I have yet to find anyone using social media who has purchased one.

This is the truck ram uses for its max towing claim.

A quad cab 2wd tradesman with 5.7 eTorque and the Dana Super 60 rear axle.

 

[crazykid1994]

The 5th gen RAM 1500 offers a Dana Super 60 axle only available on 2wd models. Which is the other axle being talked about here.

I have yet to find anyone using social media who has purchased one.

This is the truck ram uses for its max towing claim.

A quad cab 2wd tradesman with 5.7 eTorque and the Dana Super 60 rear axle.

Super 60? Does it use the stock 1500 frame mounting or use upgraded mounts? That would be a sweet drop in

 

[RamElectricalRet]

Besides the towing/hauling weight requirements listed above, there are max. temperature limits that are dictated by towing/hauling ratings. These include trans. fluid, engine coolant, engine oil, and differential fluid. As the weight ratings increase, cooling systems become more robust.