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Discussion Starter #1
2019/2020 Is the only difference between 4500 and 5500 the rear spring pack ? I see on a 4500 you can get 4.10 rear end where 5500 you cannot.
Any ride quality difference between the two. Have driven a 5500 and yes it rides like a rock unloaded. Is the 4500 the same.


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You can get 4.89 on the rear of a 5500. Maybe the 4.10 gears are stock for a 5500. I ordered mine with 4.89.


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Discussion Starter #3
With 4.89 what are you rpm wise at 65. Or do you not have your truck yet


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I would bet with 19.5 rims the 4.89 gears will run like 4.10 gears in 17s or pretty darn close.
 

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Discussion Starter #6
The 19.5 tire height is almost identical to stock 17” tire height


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Discussion Starter #9
The stock tires are 31" tall. The 5500 has a rear stabilizer bar and the 4500 does not.


My local dealer had a 4500 and 5500. 4500 had 10 leaf pack. 5500 had 11
Both had rear stabilizers. The 4500 just wasn’t as big in diameter


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Discussion Starter #11
I’m just looking to see all the differences on paper I want 5500 but truck will be unloaded or light loaded a lot to so want to see if 4500 ride quality is better


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I’m just looking to see all the differences on paper I want 5500 but truck will be unloaded or light loaded a lot to so want to see if 4500 ride quality is better
With a lower GVWR (I'm guessing) and one less leaf in the spring pack, a 4500 has to ride better.
Not good, but better.

Then again, a 5500 with correct tire pressure for running empty will most likely ride better than a 4500 with a higher pressure.
 

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Discussion Starter #13
With a lower GVWR (I'm guessing) and one less leaf in the spring pack, a 4500 has to ride better.

Not good, but better.



Then again, a 5500 with correct tire pressure for running empty will most likely ride better than a 4500 with a higher pressure.


I wonder if they have tire pressure monitoring which wouldn’t allow you to air down when empty


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I wonder if they have tire pressure monitoring which wouldn’t allow you to air down when empty
Even a 3500 doesn't have TPMS, but TPIS, so unless you order TPMS as an option they should not have it.
 

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Then again, a 5500 with correct tire pressure for running empty will most likely ride better than a 4500 with a higher pressure.
225/70R19.5’s have a minimum pressure of 70 psi, so it won’t be safe to run anything below that due to tire integrity and or bead sealing issues.

With that being said.....I played around some with my inflation pressures, trying to obtain a small increase in ride comfort, only to watch the fuel economy tank, and this was with LRR OE Continental tires.
 

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225/70R19.5’s have a minimum pressure of 70 psi, so it won’t be safe to run anything below that due to tire integrity and or bead sealing issues.
Ah, yes, the rules and regulations. The ones that keeps you from using a 2500 instead of a 4500, right? After all, we all know that 2500s are only eclipsed by Ecodiesels when it comes to towing.

Anyway, I never did look into the rules when running 40 psi in the 24.5 rears on my Pete. And guess what? I'm still here to pester you. Hah!
 
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I have driven both... a 5500 with a Knapheide Steel bed and a 4500 with a CM Steel bed. Both 60 CA. I personally am after a flat bed truck for usability but don't need the massive payload capacity. Every time I have a regular truck (3500) the bed, bed side, etc. end up trashed from use. I'm looking to bypass that pain.. I was pretty confident after driving the 4500 that it rode even better than my 3500 Crew Cab Shortbed SRW. The 5500 was tough, much rougher than the 4500 IMO. That could be in part due to the longer wheelbase. The tires were fully inflated on both trucks. I'm ordering a 2020 4500 SLT in the spring. Going with a Martins Welding custom aluminum flatbed:grin2:
 

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Discussion Starter #18
So I reached out to ram body builder asking the physical differences and here’s what I got

I find it weird the 5500 has larger radiator




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I find it weird the 5500 has larger radiator
That makes perfect sense to me. A "larger" vehicle is expected to perform harder work, thereby creating more heat.
 
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