Porpoising

[JB 00]

On certain sections of concrete freeway the truck will get into an uncomfortable rhythm of sharp bounces at higher speeds. It's more annoying than anything. Any fixes other than driving 45 mph on the freeway?

It's a relatively new truck with less than 5,000 miles, no mods other than a new set of wheels.

Thanks for the input.

 

[4rdFan]

Check your tire pressures. Fronts should be around 36-38 PSI and rears around 33-34 PSI.

 

[Reno6]

Expansion joints on concrete freeway and pickup trucks don't play well together. Every pickup does it to some extent. My last 4 have all done it no matter what shocks or tire pressure. Raptor is the best I have experienced of Tundra, Siverado and Ram.

 

[zombiekiller]

On certain sections of concrete freeway the truck will get into an uncomfortable rhythm of sharp bounces at higher speeds. It's more annoying than anything. Any fixes other than driving 45 mph on the freeway?

It's a relatively new truck with less than 5,000 miles, no mods other than a new set of wheels.

Thanks for the input.

sit up straighter and ride it like a horse.

My raptor now barely does it, so you could copy mine and it'll be great.

My super duty with the Carli pin top kit and everything else that Carli makes for super duty makes me giggle because it bucks a lot over expansion joints.


I live in Louisiana so elevated roadways with expansion joints are more the norm than anything else.

you essentially have the perfect wheelbase for the front tires to take a bump a split second before the rear tires do and it creates the effect.

playing with tire pressure will help a bit, but not get rid of it entirely. if you back off of high-speed compression, it will smooth out too.

 

[RaptorIII]

Even Though it maybe only 5000 miles you could have a bad front strut or has gone soft, if you can return to the dealership and ask them to take a ride with you and show them what Is going on with your Raptor. Was it a new Raptor or a used, meaning have you put all the mileage or did you buy it used, Next would be to see if the front struts have any oil around them with only 5000 miles they should look super clean.

If you are having no problems with the list I just gave you, I would drive down to the road your talking about and watch other cars/trucks go over the same area could be some really bad part of the road.

 

[Joe12345]

I think this phenomenon is just the nature of the beast. I will say that adding deavers made it worse.

 

[Dacam]

Expansion joints will do this. It’s the length of the wheelbase of the truck.

 

[David Godbee]

Just drive 95 and it want have time to rock! All you will hear is rapid clicks and the sweet sound of hauling a--! I gotta get more gas!

 

[Dacam]

Just drive 95 and it want have time to rock! All you will hear is rapid clicks and the sweet sound of hauling a--! I gotta get more gas!

LMAO!!
Your absolutely correct!

 

[Krisman]

I started to experience this issue as well around 20k miles. It does seem more prominent on freeways where there are expansion joints, but I also notice it on certain roads as well. Speed makes it more prominent.

I thought it was a tire balance issue on my left rear, so I swapped out my spare with that tire. I was running 37s on stock wheels. No change. Then I swapped out to 35s all around on an aftermarket wheel, again no change. I took it to the dealership, and they state everything looks fine. I have Deavers +3 and they don't really seem to prevent this issue, as I have seen suggested on other forums.

As suggested above, seems like an inevitable problem. I only share my experience so you don't all go through the changes I did and waste your time.

Nonetheless, it is uncomfortable, and any other suggestions to improve the bumpiness would be much appreciated.