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Open Roads Forum  >  Towing

 > 2500HD ride

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Les Steward

Fort Worth, Tx

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Posted: 01/30/21 02:56pm Link  |  Quote  |  Print  |  Notify Moderator

I have a 2012 2500 HD Cummins Diesel GMC and tow a 10,000 lb bumper pull. I have added two leaf springs on each side of truck. What can I do to improve the bumpy ride while towing the trailer?

rhagfo

Portland, OR

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Posted: 01/30/21 03:44pm Link  |  Quote  |  Print  |  Notify Moderator

Well if you have a Cummins engine you have a Ram, if it is a GMC it should be a Duramax. Springs don’t fix bounce a good set of shocks should fix excessive bounce. Bilstein is a great towing shocks.


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Posted: 01/30/21 04:10pm Link  |  Quote  |  Print  |  Notify Moderator

9 year old shocks may need replacing. Koni is also a good shock.


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Posted: 01/30/21 08:35pm Link  |  Quote  |  Print  |  Notify Moderator

Why did you add leaf springs? A 10,000 pound trailer probably has a 1,200 to 1,500 pound tongue weight. That should be well withing the payload capacity of a 2500. Are you using a WDH? Is it adjusted right? I agree, put some good shocks on it, Bilstein or KYB Mono Max.
How much air are you running in your tires? If you have them inflated to 80 psi it is likely too much. Weigh the axles and consult a tire load inflation chart and inflate accordingly. I would be 65 or 70 psi would be about right.

edatlanta

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Posted: 01/31/21 05:51am Link  |  Quote  |  Print  |  Notify Moderator

rhagfo wrote:

Well if you have a Cummins engine you have a Ram, if it is a GMC it should be a Duramax. Springs don’t fix bounce a good set of shocks should fix excessive bounce. Bilstein is a great towing shocks.


I just replaced a set of shocks on my truck. Bilstein is the brand for me and has been since truck was new.


Ed
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nickthehunter

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Posted: 01/31/21 06:29am Link  |  Quote  |  Print  |  Notify Moderator

Take the two springs you added off, buy a weight distribution hitch, install it and get it adjusted properly, and you’ll improve your ride by leaps and bounds.

valhalla360

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Posted: 01/31/21 07:08am Link  |  Quote  |  Print  |  Notify Moderator

rhagfo wrote:

Well if you have a Cummins engine you have a Ram, if it is a GMC it should be a Duramax. Springs don’t fix bounce a good set of shocks should fix excessive bounce. Bilstein is a great towing shocks.


Stiffer springs make for a rougher ride unless the load increases proportionally. Since a 2500 should have no issues with the hitch weight of a 10k trailer, you made it more stiff.


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Cummins12V98

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Posted: 01/31/21 07:51am Link  |  Quote  |  Print  |  Notify Moderator

Les Steward wrote:

I have a 2012 2500 HD Cummins Diesel GMC and tow a 10,000 lb bumper pull. I have added two leaf springs on each side of truck. What can I do to improve the bumpy ride while towing the trailer?


Get rid of the leaf springs, install Bilstein's on 4 corners and add air bags. Trick is to set with just enough air to have a level ride.

Also air your tires based on actual loaded weights. Use tire weight/inflation chart for your tires. add 5psi to rears and 10 to fronts to what the chart says.


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goducks10

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Posted: 01/31/21 09:39am Link  |  Quote  |  Print  |  Notify Moderator

Never had that issue with our 12 Cummings Powermax. Try KYB Monomax shocks. I put some on our 12 Dodge Ram and they worked great and are cheaper than Bilstiens.
Like others have said drop the springs and add or adjust the weight distribution hitch.

opnspaces

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Posted: 01/31/21 09:56am Link  |  Quote  |  Print  |  Notify Moderator

Do you currently use a weight distribution hitch? If so I agree with the others to remove the added springs and spend some time adjusting the weight distribution hitch. I would look into adjustments before putting down any money on new anything.


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