Class V hitch/auto leveling air suspension? - Dodge Cummins Diesel Forum
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post #1 of 29 (permalink) Old 04-15-2019, 06:37 PM Thread Starter
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Class V hitch/auto leveling air suspension?

I posted a question in towing/hauling section and didn't get the info I was looking for.

I would like to hear from people that have the air suspension and tow with a WDH. How do you properly set it up Step by step?

It seems like the air suspension is going to level the truck but at the same time so is a WDH so its confusing.

Toy hauler
Dry weight: 5448
GVWR:7500
Hitch weight:620

Also my hitch is a Class V hitch 6814077SAE. I can't find any specs at all. Anyone have info what the WC and WC/WDH is?


2014 Ram 2500 Crew Cab 4X4 long bed
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post #2 of 29 (permalink) Old 04-15-2019, 07:28 PM
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From my 2018 3500’s manual (sorry the spacing didn’t copy and paste very well):

“Towing With 2500/3500 Air Suspension
1. Position the truck to be ready to connect to the trailer (do not connect the trailer).
NOTE: Normal Ride Height (NRH) or Alternate Trailer Height (ATH) can be used. The vehicle must remain in the engine running position while attaching a trailer for proper leveling of the air suspension system. It may not be possible to enter Alternate Trailer Height (ATH) while lightly loaded.
2. Measuretheheightofthetopofthefrontwheelopening on the fender to ground, this is height H1.
3. Attach the trailer to the vehicle without the weight distribution bars connected.
4. Measuretheheightofthetopofthefrontwheelopening on the fender to ground, this is height H2.
5. Install and adjust the tension in the weight distributing bars per the manufacturers’ recommendations so that the height of the front fender is approximately (H2-H1)/ 2+H1 (about 1/2 the difference between H2 and H1 above normal ride height [H1]).
6. Preform a visual inspection of the trailer and weight distributing hitch to confirm manufacturers’ recommen- dations have been met.
Measurement Example
Example 2500/3500 Height (mm)
H1 1030
H2 1058 H2-H1 28 (H2-H1)/2 14
(H2-H1)/2 + H1 1044
NOTE: For all towing conditions, we recommend towing with tow haul mode engaged.”

It also states that
“Trailer Hitch Type and Maximum Trailer Weight The following chart provides the maximum trailer weight a given factory equipped trailer hitch type can tow”

The chart shows class V as
rated for 18000lbs towing and 1800lbs TW

Hope that helps



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post #3 of 29 (permalink) Old 04-15-2019, 07:55 PM
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^^ What rforestr said. Follow the manual and it should work out for you.

The biggest irritant for me was that you have to leave the truck running as you are setting it up, because the truck will try to return it to ride height after 10 minutes or so. So get everything put on correctly before you start doing the adjusting.

Biggest thing to watch for: when you put the weight on the truck, wait a few seconds because it will lift the rear end up. Don't get your hands between any pinch points. It will do it again after you remove the weight. Again, watch your hands.

What hitch and shank are you using?

For WC/WDH, it is 1200/1700 for the general numbers, but I read here that the 2018 goes up to 1800 with the WDH. Don't know your year.

EDIT: ah, 2014. Here. looks like 1700 for you. See note at the end.

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post #4 of 29 (permalink) Old 04-15-2019, 08:03 PM Thread Starter
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^^ What rforestr said. Follow the manual and it should work out for you.

The biggest irritant for me was that you have to leave the truck running as you are setting it up, because the truck will try to return it to ride height after 10 minutes or so. So get everything put on correctly before you start doing the adjusting.

Biggest thing to watch for: when you put the weight on the truck, wait a few seconds because it will lift the rear end up. Don't get your hands between any pinch points. It will do it again after you remove the weight. Again, watch your hands.

What hitch and shank are you using?

For WC/WDH, it is 1200/1700 for the general numbers, but I read here that the 2018 goes up to 1800 with the WDH. Don't know your year.
I'm picking up the toy hauler tomorrow and the guy is giving me his setup that he was using so i'm exactly sure what he has yet.

So if i can understand this correctly- I will put my truck in ALT height mode and back up to the trailer, leave my truck running, and then lower the trailer on the truck. The truck will then level it's self back to the ALT height? then I would hook up my weight distribution hitch after it's leveled?

I would normally leave my trailer hooked up to the truck while I camp. Can I still do that if its in ALT height mode? Or will it adjust to normal after 10 minutes? What if you stop for lunch in the road?

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post #5 of 29 (permalink) Old 04-15-2019, 08:18 PM
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With that light weight trailer, I wouldn't even use the WDH bars.

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post #6 of 29 (permalink) Old 04-15-2019, 08:23 PM
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Quote:
Originally Posted by AZhunter79 View Post
I'm picking up the toy hauler tomorrow and the guy is giving me his setup that he was using so i'm exactly sure what he has yet.

So if i can understand this correctly- I will put my truck in ALT height mode and back up to the trailer, leave my truck running, and then lower the trailer on the truck. The truck will then level it's self back to the ALT height? then I would hook up my weight distribution hitch after it's leveled?

I would normally leave my trailer hooked up to the truck while I camp. Can I still do that if its in ALT height mode? Or will it adjust to normal after 10 minutes?
My experience:
I had the Fastway E2 hitch with the longest drop 2.5" shank and had to use ALT mode. I then moved up to the Equalizer E4 for my new trailer. Same shank, but the hitch head sits lower, so I don't use ALT mode for it. So it will depend on the hitch.

First, follow the instructions of the hitch to attach to shank. This will determine how close hitch head height and coupler height are to each other. Truck should be running to make sure it's not leveling for parking. Keep truck running. You'll determine ALT height or not at this point.

Using truck manual as guide, do your front fender height measurement with the truck running and in ALT or not, depending on hitch head and coupler height.

Drop the trailer on the hitch and wait for the truck to auto rise. Measure front fender again.

Leave the truck running, in ALT as necessary (based on hitch head height and coupler height), and drop the tongue on the hitch. In a few seconds it will adjust. If it's like mine, you lock the coupler and raise the tongue high enough to get the spring bars on the L brackets. Once you install the bars, you then lower the tongue jack to put all the weight back on the truck. Truck will self adjust while you are doing this. Measure your front fender height at this point to see if adjustments are necessary.

Once you're adjusted, you follow the last paragraph above not including adjusting and you are good to go. Fine adjustments may be necessary later.

The manual makes it seem more confusing then it turns out it is.

I think it will stay in ALT mode until you turn it off manually.

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post #7 of 29 (permalink) Old 04-15-2019, 09:06 PM
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Quote:
Originally Posted by IchLiebeBier View Post
Quote:
Originally Posted by AZhunter79 View Post
I'm picking up the toy hauler tomorrow and the guy is giving me his setup that he was using so i'm exactly sure what he has yet.

So if i can understand this correctly- I will put my truck in ALT height mode and back up to the trailer, leave my truck running, and then lower the trailer on the truck. The truck will then level it's self back to the ALT height? then I would hook up my weight distribution hitch after it's leveled?

I would normally leave my trailer hooked up to the truck while I camp. Can I still do that if its in ALT height mode? Or will it adjust to normal after 10 minutes?
My experience:
I had the Fastway E2 hitch with the longest drop 2.5" shank and had to use ALT mode. I then moved up to the Equalizer E4 for my new trailer. Same shank, but the hitch head sits lower, so I don't use ALT mode for it. So it will depend on the hitch.

First, follow the instructions of the hitch to attach to shank. This will determine how close hitch head height and coupler height are to each other. Truck should be running to make sure it's not leveling for parking. Keep truck running. You'll determine ALT height or not at this point.

Using truck manual as guide, do your front fender height measurement with the truck running and in ALT or not, depending on hitch head and coupler height.

Drop the trailer on the hitch and wait for the truck to auto rise. Measure front fender again.

Leave the truck running, in ALT as necessary (based on hitch head height and coupler height), and drop the tongue on the hitch. In a few seconds it will adjust. If it's like mine, you lock the coupler and raise the tongue high enough to get the spring bars on the L brackets. Once you install the bars, you then lower the tongue jack to put all the weight back on the truck. Truck will self adjust while you are doing this. Measure your front fender height at this point to see if adjustments are necessary.

Once you're adjusted, you follow the last paragraph above not including adjusting and you are good to go. Fine adjustments may be necessary later.

The manual makes it seem more confusing then it turns out it is.

I think it will stay in ALT mode until you turn it off manually.
The truck won’t self adjust if you put it into tire jack mode.

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post #8 of 29 (permalink) Old 04-16-2019, 05:03 AM
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Quote:
Originally Posted by Lins View Post
The truck won’t self adjust if you put it into tire jack mode.
But, you want the truck to auto adjust to ride height with the weight while getting the measurement. Won't tire jack mode present an incorrect height? I wouldn't use it doing the setup.

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post #9 of 29 (permalink) Old 04-16-2019, 09:36 AM
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Quote:
Originally Posted by IchLiebeBier View Post
Quote:
Originally Posted by Lins View Post
The truck won’t self adjust if you put it into tire jack mode.
But, you want the truck to auto adjust to ride height with the weight while getting the measurement. Won't tire jack mode present an incorrect height? I wouldn't use it doing the setup.
In that case yes. I disable it after hooking up, so I can use the tongue jack to lift a little to make getting the bars on easier.

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post #10 of 29 (permalink) Old 04-26-2019, 10:22 PM Thread Starter
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Ok,

So I got the toy hauler. I measured the front wheel well and then dropped the weight on the truck. I left it in regular height and it adjusted back up. I then remeasured the front wheel well and it only went up a half inch. I put the truck in Tire jack mode which does disable the suspension and lifted the truck up with the trailer. I was going to attach the bars and then realized I didn't have the pins for them so I couldn't do it and towed it home with no bars on. Right now the trailer is really level and everything looks good and it towed fine.

My question is, don't most WDH have a minimum link they want you to use for tension. It seems like the truck barely moved up in front so I really wouldn't need all that much tension to bring it back down.

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post #11 of 29 (permalink) Old 04-26-2019, 10:30 PM
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I think you can forget about having the air suspension and just follow the WD manufacturer's instructions in normal fashion.

Maybe if we start telling people that the brain is an app, they will start using it?

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post #12 of 29 (permalink) Old 04-26-2019, 10:37 PM Thread Starter
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I think you can forget about having the air suspension and just follow the WD manufacturer's instructions in normal fashion.
I got the WDH system from the seller of the toy hauler. It's an older model and I contacted the manufacturer and they gave me no info because it's an older model they don't make any more.

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