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 > 5.9 Cummins Diesel Towing capacity

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rhagfo

Portland, OR

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Posted: 01/27/20 10:30pm Link  |  Quote  |  Print  |  Notify Moderator

billy1davis wrote:

it is a 2001
5.9 diesel
Dually
not 4x4
I had the tranny rebuilt with very heavy duty inards. He said better than the original and an extra cooler
Also has been chipped,
I never have had the the radiator flushed or the fluids changed
So I was pulling a 12000+ 5vr and it did find on the level but climbing a steep pass like a 2 lane and it got real hot so I pulled over 3 times to let it cool.
If it hadn;t heated up I could have pulled over that pass and others without any trouble.


The issue with the 2001 is the puke bottle getting gunk on the back side of the radiator. Drain cooling system, and pull radiator and steam clean all the gunk off of the cooling fins. Then refill after internal flush with 60/40 antifreeze/water mix for max cooling.


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Huntindog

Phoenix AZ

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Posted: 01/28/20 01:57am Link  |  Quote  |  Print  |  Notify Moderator

IIRC, Dodges of that era were available with 3 gear ratios, each with a different tow rating. This was to protect the tranny.
A popular swap when fuel prices were high was to install 3.42s for better economy.
A friend bought such a truck used, thinking it had the orginal 4.10s. After destroying the trans towing a living quarters horse trailer, it had a pinion leak. The dealer discovered the gear swap during the repair. He had 4.10s put in it, and all was well.



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Mote

Hoosier State

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Posted: 01/28/20 04:41am Link  |  Quote  |  Print  |  Notify Moderator

billy1davis wrote:

it is a 2001
5.9 diesel
Dually
not 4x4
I had the tranny rebuilt with very heavy duty inards. He said better than the original and an extra cooler
Also has been chipped,
I never have had the the radiator flushed or the fluids changed
So I was pulling a 12000+ 5vr and it did find on the level but climbing a steep pass like a 2 lane and it got real hot so I pulled over 3 times to let it cool.
If it hadn;t heated up I could have pulled over that pass and others without any trouble.


Howdy Billy,
I have a 1996 2wd 2500. When pulling on steep grades I use the overdrive lockout button so the transmission will lock into third gear and lock the torque converter. This keeps the transmission and engine a lot cooler when pulling hard on steep grades. Also, you might check to be sure the fan clutch is working as it should and engaging the fan.


2005 Dodge 3500
2001 Lance 1030
2006 Cougar 29RL


fj12ryder

Platte City, MO

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Posted: 01/28/20 07:26am Link  |  Quote  |  Print  |  Notify Moderator

Flushing the radiator and new antifreeze may help the heating a bit, but pulling a heavy load up a steep pass is going to work that engine hard. No way around that.

I don't know what else you've done, but install a fuel pressure gauge just in case. And a pyrometer would be good too. The old 5.9 is pretty bulletproof, but you can melt things if you're not careful


Howard and Peggy

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Cummins12V98

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Posted: 01/28/20 07:34am Link  |  Quote  |  Print  |  Notify Moderator

"The issue with the 2001 is the puke bottle getting gunk on the back side of the radiator."

So true! The one owner 01 Sport I bought two Summers ago had the radiator very plugged from the vapors coming out of the bottle. I removed radiator and had it cleaned inside and out and cleaned the engine compartment of all oil residue. I relocated a PEAK recovery bottle to the inside drivers side of the front bumper.


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ib516

Canada

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Posted: 01/28/20 07:36am Link  |  Quote  |  Print  |  Notify Moderator

billy1davis wrote:

it is a 2001
5.9 diesel
Dually
not 4x4
I had the tranny rebuilt with very heavy duty inards. He said better than the original and an extra cooler
Also has been chipped,
I never have had the the radiator flushed or the fluids changed
So I was pulling a 12000+ 5vr and it did find on the level but climbing a steep pass like a 2 lane and it got real hot so I pulled over 3 times to let it cool.
If it hadn;t heated up I could have pulled over that pass and others without any trouble.

You should pull the radiator out and clean it. The puke bottle covers it in oil mist which the fan distributes onto the rad which collects dust and plugs it up.


Prev: 2010 Cougar 322QBS (junk)
02 Dodge 2500 4x4 5.9L CTD 3.55
07 Dodge 3500 4x4 SRW Mega 5.9L CTD 3.73
14 Ram 2500 4x4 Crew 6.4L Hemi 4.10
06 Chevy 1500 4x4 E-Cab 3.73 5.3L
All above are sold
Current: 07 Dodge 1500 5.7L Hemi 3.55 / 2010 Jayco 17z


fj12ryder

Platte City, MO

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Posted: 01/28/20 08:18am Link  |  Quote  |  Print  |  Notify Moderator

While checking the puke bottle is a good idea, mine has never proven to be a problem. No oil mist on the radiator, or gunked up puke bottle. But it is something to be checked.

Super_Dave

Harrisville, UT

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Posted: 01/28/20 08:43am Link  |  Quote  |  Print  |  Notify Moderator

The 5.9 has no problem pulling a house off its foundation, the overheating isn't a motor issue. My dually has the 5.9 and is rated for 18,000 lbs. The overheating issue is from another weak link in the system, not the motor.


Truck: 2006 Dodge 3500 Dually
Rig: 2018 Big Country 3155 RLK
Boat: 21' North River Seahawk


mkirsch

Rochester, NY

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Posted: 01/28/20 09:12am Link  |  Quote  |  Print  |  Notify Moderator

If you're happy with the performance at 12,000, you won't notice much of a difference at 14,000 unless the new trailer has a lot more frontal area, or is less aerodynamic.

Assuming a 5th wheel travel trailer, as long as the pin weight doesn't overload the rear tires, and all the brakes work, fix the cooling problem and hit the road.


Putting 10-ply tires on half ton trucks since aught-four.

billy1davis

usa

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Posted: 01/28/20 09:50am Link  |  Quote  |  Print  |  Notify Moderator

This is all very helpful. Thanks so much for your input and sure would love more comments if there is more I need to know.

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