the1adman
Tucson, Az
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I have owned and towed 15K plus with both. The HO does it better and the Aisin is better loaded, but its not by a large margin. I think starting at 15K and above the HO makes more sense. Also my HO gets about 1-2 MPG less in most situations.
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Cummins12V98
on the road
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southernsky wrote:Yes but watch out for the exploding fuel pump
For model years 19 and 20 they were stupid and went with the CP4 and they realized it was a bad ides. They are replacing all of the pumps on every one of those trucks at no cost to the customer.
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2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"
"HeavyWeight" B&W RVK3600
2016 MobileSuites 39TKSB3 highly "Elited" In the stable
2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD
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Grit dog
Black Diamond, WA
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southernsky wrote:Yes but watch out for the exploding fuel pump
Derp!
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold
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Cummins12V98
on the road
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rhagfo wrote:southernsky wrote:Yes but watch out for the exploding fuel pump
bucky wrote:That depends on the year model and whether or not a CP4 injection pump is involved.
Well Ram decided to go back to the CP3, and issued a recall on all 2019 and 2020 Rams with the CP4 to replace with the CP3.
"Everyone is calling it a CP3, but it’s actually a CP-ISB21. It’s certainly not the same CP3 that was used in 07.5-18"
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Me Again
AZ - Summer in NW WA
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Lets see, GM went to the Desmo pump as the CP-4 pain was to much for them. RAM reversed back from the two years of CP-4 failures. Saw a new 5500 with 9,500 miles with failed CP-4. Guess who still uses the CP-4?
Here is a picture of the 5500 being unload at RAM dealer.
![[image]](https://i.imgur.com/zmnYMdOl.jpg)
2021 F150 2.7 Ecoboost - Summer Home 2017 Bighorn 3575el. Can Am Spyder RT-L Chrome, Kawasaki KRX1000. Retired and enjoying it! RIP DW 07-05-2021
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FishOnOne
The Great State of Texas
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Me Again wrote:Lets see, GM went to the Desmo pump as the CP-4 pain was to much for them. RAM reversed back from the two years of CP-4 failures. Saw a new 5500 with 9,500 miles with failed CP-4. Guess who still uses the CP-4?
Here is a picture of the 5500 being unload at RAM dealer.
We now know the CP4.2 pump doesn't tolerate air in the fuel especially after a fuel filter change and guess who didn't use a lift pump?
Cummins used a asymetrical CP4.2 pump and they were failing like crazy and tried to switch to a symetrical pump but it was too late. Guess who doesn't use a asymetrical pump?
* This post was
edited 10/22/22 03:16pm by FishOnOne *
'12 Ford Super Duty FX4 ELD CC 6.7 PSD 400HP 800ft/lbs "270k Miles"
'16 Sprinter 319MKS "Wide Body"
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Fisherman
Angus, Ontario, Canada
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Ya well we all know about Fords. CP3's are now being switched out on a recall.
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IdaD
Idaho
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FishOnOne wrote:Me Again wrote:Lets see, GM went to the Desmo pump as the CP-4 pain was to much for them. RAM reversed back from the two years of CP-4 failures. Saw a new 5500 with 9,500 miles with failed CP-4. Guess who still uses the CP-4?
Here is a picture of the 5500 being unload at RAM dealer.
We now know the CP4.2 pump doesn't tolerate air in the fuel especially after a fuel filter change and guess who didn't use a lift pump?
Cummins used a asymetrical CP4.2 pump and they were failing like crazy and tried to switch to a symetrical pump but it was too late. Guess who doesn't use a asymetrical pump?
You can package a turd anyway you want and you've ultimately still got a turd. I wouldn't buy a vehicle with a CP4 in it.
2015 Cummins Ram 4wd CC/SB
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Showme 5vr
Belton, USA
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I want to thank those of you that have replied. It appears that when ordering a 2023 RAM 3500 SRW Crew Cab long bed that the HO upgrade is now almost $4000 more not the $2800 it was for the 2022 model year. So we have gone with the regular 6.7L Cummins Diesel.
Steve & Judy 2023 RAM 3500 6.7L Cummins HO Crew Cab LWB, 2017 Grand Design Reflections 337RLS
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mudfuel07
North Florida!
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I don't think you will regret it. I have had no issues with mine.
2020 Ram 2500 6.7 CTD 4x4 Tradesman(with a few toys)
2020 Puma by Palomino 32RBFQ for the kids!
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