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Old 06-11-2019, 10:01 PM   #21
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Bounce

Look at Timben's. They replace the bump stops on your rear springs. They look like big Kong dog chew toys. They are about $300 @ E-Trailer.com. You do not notice them at all in normal driving, only under load. I put them on my Tundra 2 years ago. You loosen 2 U-bolts on each axel and swap out OEM stops. It installed w/ my air wrench in 45 minutes, including torquing back to original specs. No more bouncing over railroad tracks or bouncing on highway bumps w/ trailer. Solved my problem w/o expense of air bags and no maintenance.
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Old 06-11-2019, 10:59 PM   #22
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Originally Posted by TheWolfPaq82 View Post
Drop 10k into shocks, tires, springs airbags....or start with the little stuff. Add some air to the TV tires, check TT tire pressure and go from there.
$2k will get you most or all of that.
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Old 06-11-2019, 11:39 PM   #23
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You have lots of options here...

Two quick thoughts for you- what size bars do you have on your WDH? sometimes having bars that are too big can cause bouncing.

I personally think SumoSprings are as good as airbags (for the job you are doing). AND they are significantly cheaper and you can install them yourself.


Yes SumoSprings work great but aircells from air lift half the price
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Old 06-12-2019, 12:15 AM   #24
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There's not going to be one single thing that will be the primary suspect. Start with ensuring the WDH is transferring the correct amount of tongue wt. onto the steer axle and make sure the spring bars aren't undersized. Too stiff can cause damage to the A-frame and too soft can result in more bounce and inability to transfer enough wt. onto the steer axle.

We had undersized spring bars on a previous TT because I pre-ordered them based on the dry wt. figure. While the 800 lb bars were well above the 540 lb dry TW, the actual TW with TT fully loaded ended up at 950 lbs (and 14.5% TW). The TT bounced like crazy. 1200 lbs really reduced the bounce, including movement transferred onto the truck.

Ensure you have adequate TW and at least 10% of actual TT weight (GVW). Average is 12-13%. More is better if the TV can handle it. We have just under 15% and have no bounce issues (or sway).

If LRE tires, try inflating the rears to, or near, the 80 psi sidewall max and also raise the front to 70 psi or even more. The brand/type of LRE tires can be a factor, even if the same size. Some tires have a kevlar sidewall which helps. Just bought a new set of them for our 3/4 ton truck instead of the Michelins I wanted at first which have very soft sidewalls in comparison. You don't want P rated tires for towing. The placard on the GM says to inflate the rears to 80 psi which surprised me a bit.

Inflate the TT tire pressure to the sidewall max. - 50, 65 or 80 depending on load range.

Stiffer shocks on the truck will help a LOT. The Bilstein 4600s are excellent. Had them on our F250 but the engine "exploded" last week (long story) and we bought a '12 GM Sierra 2500 as a replacement. While the shocks on it seem good, I'm ordering a set of new Bilsteins for it.

Shocks on the TT will also help a LOT. The reduced vertical movement on the TT means less vertical movement transferred onto the truck via the coupler/ball connection. You'd be amazed by how much they help regardless.

I wouldn't bother with air bags. Some swear by them but you should address the various factors related to the bounce first as outlined above.
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Old 06-12-2019, 12:37 AM   #25
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Let's just say that you feel as if you have tuned in the WDH the best you can and still have some "porpoising" at times, and possibly a little bit of a strange sway at times. I tuned my WDH until I felt that I had done the best I could and still had a little bit of porpoising after a bump and still had a weird little sway, particularly when a big truck passed me. An older gentleman at one campground and I were talking and he suggested the following: He showed me that I still had the original "P" tires on my GMC 1500 and explained how they had somewhat soft sidewalls which gave the truck a smooth ride. He highly suggested that I look into some tires with at least a "D" rating and possibly go to an "E" rated tire. He also showed me that he had added an extra heavy duty leaf spring to his truck, a Ford F-150 and stated that it helped a lot. Well I did just what he suggested. I changed out my tires, with only 26K miles, to an "E" rated TOYO tire, which my trusted tire man suggested. The next trip out was like the difference in night and day. The rig drove better, handled better and rode better. I did eventually add a heavy duty "Hellwig" brand leaf spring, again my tire guy suggested these. The truck rides very well with nothing hooked up but when I put a load on it the extra springs kick in and help. Now my rig goes down the road much more comfortable to me.
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Old 06-12-2019, 07:17 AM   #26
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Yes SumoSprings work great but aircells from air lift half the price
Didn't see those when I was shopping...
I actually paid $150 for my SumoSprings. I had a price watch on them on Amazon and they dropped to $150 one day so I jumped on them.

The AirCell looks like its the same thing, basically. Definitely worth the money!
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Old 06-12-2019, 02:44 PM   #27
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Didn't see those when I was shopping...
I actually paid $150 for my SumoSprings. I had a price watch on them on Amazon and they dropped to $150 one day so I jumped on them.

The AirCell looks like its the same thing, basically. Definitely worth the money!
I've been waiting for a better price on SumoSprings. I went to Airlifts website and they don't show a Aircell kit for a 2014 F150.
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Old 06-12-2019, 03:45 PM   #28
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I've been waiting for a better price on SumoSprings. I went to Airlifts website and they don't show a Aircell kit for a 2014 F150.
Just talked to Airlift. They said the Aircell is not for unloaded vehicles, only for fixed load support. They said it's different from Timbrens and SumoSprings.
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Old 06-13-2019, 07:24 AM   #29
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Just talked to Airlift. They said the Aircell is not for unloaded vehicles, only for fixed load support. They said it's different from Timbrens and SumoSprings.
Interesting... Sumo springs would probably say something similar. Unloaded my sumosprings are .5-.25" from touching the axel. Well, I live on a dirt farm road... you can bet I feel them back there. With a load they are great... but a little rough without. I'm willing to trade the firm ride for the stability though.
Oh- and I have E-rated tires.... "Tighten bra-straps and remove dentures!"
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Old 06-13-2019, 08:06 AM   #30
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Just talked to Airlift. They said the Aircell is not for unloaded vehicles, only for fixed load support. They said it's different from Timbrens and SumoSprings.


I canít argue with what they say. I had Sumos or Timbren on my last two 1/2 tons and AIRCELL On my 1 ton other than color they look the same go in the same place. Here is a pic on my Ram . Click image for larger version

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