Towing this with 3/4 ton

[BlackSS]

Looking for thoughts on how this would behave:
2013 F250 diesel crew cab (short bed 4x4)
pull rite slider

From Ford Spec sheet:
GVWR 10,000#
Max payload: 3240#
Max 5th wheel trailer weight 15,900

Looking at buying a 2005 Jayco Talon 36Z
The specs I have found from a Jayco spec sheet:
Dry weight: 10,500#
Dry pin weight: 2,495#
Gross weight 14,900#

I will verify these numbers with Jayco when I get VIN # from seller.
By the book this is "legal" combo. Pin weight may get high if fully loaded, but most of the weight would likely be behind the axles in the garage and not add much in terms of pin weight. I would think that with 2000# of gear in the trailer I would be approaching the limits of pin weight considering people and gear in the truck.

Thoughts from people that have done something similar?

[Fixed_Sight_Tra]

A higher ratio differential will put the transmission gears closer together but also restrict the range of your transmission. You have to ask yourself if the restricted range outweighs the benefit of closer gear changes.

Sort of. If by restrict the range of the transmission you mean possibly lowering the top speed of the truck when not pulling. Say 90 mph instead of 100. It will restrict the transmission range if you truck is capable of max rpms at top gear. Most of us don't use that capability but if you do go blazing cross country at 85 or 90 it may make a difference. I'm not putting you down if you do, more power to you.

For pulling you are always better off with lower diff gears resulting in closer ratio final gears. Everything else being equal.

BTW this is the main problem I have with my Tahoe. I have a 2000 rpm shift so when it does shift I go from being at the top of the power band to just below. I essentially have one gear for pulling hills. 2nd. 1st will get me up the hill at 30 but not fast enough to get into second. If I had lower gears I could make the shift and be on my way.

[lincster]

Fixed Sight Training wrote:

You can make your rpm basically whatever you feel is appropriate by changing gears and / or adjusting speed. You don't honestly think a 4.10 vs 3.55 gear ratio is going to make a difference in glazing brakes if the driver is using his equipment property do you?

Actually lower differential gears will bring all the final gears closer together giving you more options and able to pick a more appropriate gear for your situation. It's a bigger deal when you are going up hill but down hill it helps too.

If you are alone on the road then you can pick whatever speed is appropriate for your rig/ situation but in traffic your speed is often dictated by the traffic around you. This is where the lower gears will really help.

Oh nooooooo..... this makes NO SENSE!!!!!!! (insert sarcasm)

Totally agree.

[Bedlam]

A higher ratio differential will put the transmission gears closer together but also restrict the range of your transmission. You have to ask yourself if the restricted range outweighs the benefit of closer gear changes.

[Fixed_Sight_Tra]

You can make your rpm basically whatever you feel is appropriate by changing gears and / or adjusting speed. You don't honestly think a 4.10 vs 3.55 gear ratio is going to make a difference in glazing brakes if the driver is using his equipment property do you?

Actually lower differential gears will bring all the final gears closer together giving you more options and able to pick a more appropriate gear for your situation. It's a bigger deal when you are going up hill but down hill it helps too.

If you are alone on the road then you can pick whatever speed is appropriate for your rig/ situation but in traffic your speed is often dictated by the traffic around you. This is where the lower gears will really help.

As for the OPs first post is overloading a truck cause for an insurance company not paying in case of an accident?

[BlackSS]

Perhaps I did not convey what I was trying to get across. You can make your rpm basically whatever you feel is appropriate by changing gears and / or adjusting speed. You don't honestly think a 4.10 vs 3.55 gear ratio is going to make a difference in glazing brakes if the driver is using his equipment property do you?

[lincster]

BlackSS wrote:
Basic stuff, final drive ratio is the thing that matters relative to engine rpm for a given speed, not just axle ratio. Your argument is not valid.

Really???? Wow. I'm done.

[lincster]

Bedlam wrote:
Regardless of equipment, the ones you want to avoid are the drivers that don't think.

We do agree with this. 🙂

[Bedlam]

Lincster - I agree when in drive, you will be spinning higher RPM's than me due to your differential ratio. However there is nothing stopping me from driving slower or shifting to a lower transmission gear. That's where the driver comes into play with the equipment he is operating. Neither setup is necessarily less safe if the driver adjusts for conditions. Regardless of equipment, the ones you want to avoid are the drivers that don't think.

[BlackSS]

Basic stuff, final drive ratio is the thing that matters relative to engine rpm for a given speed, not just axle ratio. Your argument is not valid.

[lincster]

Bedlam wrote:
If you're traveling at the appropriate speed for your gearing, it does not matter what your differential ratios are compared mine. If I have to be in lower transmission gear to be at the same wheel to engine rotation ratio as you, how would that matter?

The family on the side of the road with burned out brakes was there due to driving too fast or not knowing how to use engine braking. It was not due to their vehicle being a 3/4t.

I cannot agree with your statement above.

I agree, it has nothing to do with their vehicle being a 3/4 ton. I never said it did.

I talked about gear ratios/RPMs and Engine braking.
Do you agree that Engine RPM changes HP/Torque? I would hope you do.
The same can be said for how much back pressure in the engine is made at different RPMs. I can sure feel a difference when I manually shift my transmission down, the truck wants to slow down.

So, based on that, if you leave the truck in Drive, with tow/haul mode on, my truck will be at a higher RPM than a SRW truck. I hope you agree with that. Based on that, higher RPM will give you more Engine braking.

[Bedlam]

If you're traveling at the appropriate speed for your gearing, it does not matter what your differential ratios are compared mine. If I have to be in lower transmission gear to be at the same wheel to engine rotation ratio as you, how would that matter?

The family on the side of the road with burned out brakes was there due to driving too fast or not knowing how to use engine braking. It was not due to their vehicle being a 3/4t.

I cannot agree with your statement above.

[lincster]

BlackSS wrote:
My truck weighs 8500 lbs and has the same toe / haul mode engine braking as the 350 dually. Why would I think I would have problems on a 6% grade? Only difference is the TV weight, and I don't know how significant that weight difference really is, 400 - 500 lbs tops?

Actually, not correct.
2011 and up F Series trucks, SRW, don't come with anything more than a 3.55 axle ratio.
My 350 Dually comes with 3.73 axle ratio.
F450's come with 4.30 axle ratios.

So, based on axle ratios, the engine RPM is totally different, therefore, tow/haul mode works different between the different trucks.

[BlackSS]

My truck weighs 8500 lbs and has the same toe / haul mode engine braking as the 350 dually. Why would I think I would have problems on a 6% grade? Only difference is the TV weight, and I don't know how significant that weight difference really is, 400 - 500 lbs tops?

[lincster]

Slightly more stable with a dually????? First time I have seen that.
My buddy tows the same trailer as me, he has a 2500 Duramax. He rode with me to the dunes one time, he said he couldn't believe how much more solid my truck felt than his. Semi's passing us, couldn't even tell etc.
He is now getting ready to trade his truck in on a dually.

Also, totally agree with Steve O Reno. I'll let others go down before me.
I put my truck in tow/haul, I can go down a 6% grade and not touch the brakes. Going around corners, rock solid.

[big_buford]

Agree 1000% if you can not mantain a safe speed traveling downhill without using the brakes your in the wrong vehicle 🙂