New (to me) 2023 2500 Rebel not so smooth on certain highways

[RRebel1]

Hello, new to the forums and to the rebellion!
I just picked up a 2023 2500 Rebel with just over 30k on the odo a couple weeks ago and so far, I'm loving it. I just have one issue/complaint. I had to take it on a 400mile round trip and noticed there are certain types of road material that the truck doesn't seem to like too much at highway speeds. The concrete roads have horizontal lines cut in them make the truck vibrate/bounce way too much. It was unbearable for my wife and very annoying for me. On the trip back, I deflated the tires about 10PSI (from 70 to 60 on the rear, 65 to 60 on the fonts) but only noticed a marginal difference. Its mostly the rear that seems a bit bouncy and sloppy when hitting larger bumps at speed. This truck appears to have the 4600 series Bilstein's. Would moving up to the 5100 all around help with this or should I look for some coil-overs for the front and 5100's in the back? If anyone else has experienced this and found a way to correct for it, I'd love to know what you did. I love the truck but if my wife doesnt like riding in it....I might have to find a new wife. Any help would be appreciated. Part #'s earn extra cookies too...

 

[Brutal_HO]

There's a few threads on this over on sister site HDRAMS.COM.

It's a wheelbase/harmonics issue.

Get the tire pressures as low as you can, you're still too high (unloaded) even if it's a diesel.

5100's are just going to make it worse, they're quite a bit more 'sporty" than the 4600's (equivalent to stock).

 

[RRebel1]

There's a few threads on this over on sister site HDRAMS.COM.

It's a wheelbase/harmonics issue.

Get the tire pressures as low as you can, you're still too high (unloaded) even if it's a diesel.

5100's are just going to make it worse, they're quite a bit more 'sporty" than the 4600's (equivalent to stock).

Mine is the Hemi. Yeah I saw someone had said that but wanted to throw it out there anyway. I had a 2019 Ram 3500 Sport (stiffer leaf suspension of course) and it didn't behave the same way on that stretch of road. I feel like the wheelbase is very close to the same. I had 5100's on it as well so to me it felt like more of a difference in suspension and was hoping for an "easy" fix. I'll lower the pressure down a bit more, say 55 in the rear and 50 on the front and see if that helps more. Thanks for the input.

 

[Brutal_HO]

I run 55F/50R in my 3500 CCLB Cummins empty* (not OE tires). Have 5100 shocks installed (great for towing heavy).

* Empty for me is a crossover toolobx and lots of gear, a full 50 gal of fuel most of the time, probably 400lbs in the bed when my 5th wheel hitch is NOT installed.

It still rattles my teeth on some stretches of I-25 concrete.

I'd run as low as 45/40 PSI in a Hemi truck. I think the PW guys are running 35PSI in the rears.

 

[HSKR R/T]

Mine is the Hemi. Yeah I saw someone had said that but wanted to throw it out there anyway. I had a 2019 Ram 3500 Sport (stiffer leaf suspension of course) and it didn't behave the same way on that stretch of road. I feel like the wheelbase is very close to the same. I had 5100's on it as well so to me it felt like more of a difference in suspension and was hoping for an "easy" fix. I'll lower the pressure down a bit more, say 55 in the rear and 50 on the front and see if that helps more. Thanks for the input.

You actually want lower pressure in the rear if the truck is unloaded. The weight distribution, when it hauling anything,has more weight on front tires, due to the weight of engine.

Also,this a 1500 forum. You will get more help in the hdrsms forum

 

[scottmoyer]

Is there a reason we can't reset the TPMS limits without buying a tool? Factory Rebel is 55 front and 45 rear with the Good Year's. Put a different tire on it and it may require less PSI. You can't adjust the monitoring without a tool. How stupid. You always need to air up the rear when loading up. Then you may need to air down for other reasons and should be able to do it without an alert on the dash.

 

[RRebel1]

Is there a reason we can't reset the TPMS limits without buying a tool? Factory Rebel is 55 front and 45 rear with the Good Year's. Put a different tire on it and it may require less PSI. You can't adjust the monitoring without a tool. How stupid. You always need to air up the rear when loading up. Then you may need to air down for other reasons and should be able to do it without an alert on the dash.

My rebel has an option to enable/disable tire fill assist....I havent played around with that yet but it seems like maybe that would what you're looking for?

the 2500 door sticker says 70 rear 65 front.

 

[HSKR R/T]

My rebel has an option to enable/disable tire fill assist....I havent played around with that yet but it seems like maybe that would what you're looking for?

the 2500 door sticker says 70 rear 65 front.

Tire fill assist is different

 

[RRebel1]

Tire fill assist is different

You're right, I just watched a video on it. lol...seems a bit silly but whatever.

 

[KingChu]

Is there a reason we can't reset the TPMS limits without buying a tool? Factory Rebel is 55 front and 45 rear with the Good Year's. Put a different tire on it and it may require less PSI. You can't adjust the monitoring without a tool. How stupid. You always need to air up the rear when loading up. Then you may need to air down for other reasons and should be able to do it without an alert on the dash.

The reason is, correct me if I’m wrong, is that the rebel comes with e load range tires from the factory and can usually tow quite a bit, so the tire placards are 55f 45r (at least on 2020). The only reason you’d want lower is if you’d run a lower load range tire, but then you’d be defeating the trucks capability.

I’m sure with a laptop and AlfaOBD program you can change the TPMS threshold though.

 

[KingChu]

My rebel has an option to enable/disable tire fill assist....I havent played around with that yet but it seems like maybe that would what you're looking for?

the 2500 door sticker says 70 rear 65 front.

Tire fill assist just basically for getting close to factory pressure if you aired down or a tire is low. Doesn’t change the threshold at which the TPMS light comes on.

 

[Brutal_HO]

The reason is, correct me if I’m wrong, is that the rebel comes with e load range tires from the factory and can usually tow quite a bit, so the tire placards are 55f 45r (at least on 2020). The only reason you’d want lower is if you’d run a lower load range tire, but then you’d be defeating the trucks capability.

I’m sure with a laptop and AlfaOBD program you can change the TPMS threshold though.

Door placard pressures are max towing. Everyone with an HD runs much lower PSI not towing.

This is the risk of discussing HD trucks on the 1500 forum.

 

[KingChu]

Door placard pressures are max towing. Everyone with an HD runs much lower PSI not towing.

This is the risk of discussing HD trucks on the 1500 forum.

Tire sidewall pressures are max towing aka if you are maxing out the load per tire. That being said in commercial vehicles the door placard matches the sidewall or very close to it. It may be the same on 2500s and 3500s considering they are more work trucks.

And just to clarify I have a rebel 1500 and my placard says 55f 45r just like a 2500 and it came with load range E duratracs. Sidewall says max psi 80 so it’s not just HD