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Problems towing with 2015 2500

dan3415

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sdeeter19555 Senior Enthusiast

sdeeter19555

Posted
Posted

We are assuming that 2500hd has 4.10s..."In my company" indicates a fleet truck that could have 3.73s.

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redwngr Senior Enthusiast

redwngr

Posted
Posted
7 hours ago, sdeeter19555 said:

We are assuming that 2500hd has 4.10s..."In my company" indicates a fleet truck that could have 3.73s.

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Good point.

4x4Pete Enthusiast

4x4Pete

Posted
Posted

Even with 3.73 gears he still should have no problem towing 6000lbs.  Something must be up that a 1500/ 5.3 /3.42 would tow better than a "fleet" 2500.   It should be checked out.  Anything else would be guessing. 

bobsiding Enthusiast

bobsiding

Posted
Posted

certain trucks don't like certain trailers. I had a 04 duramax and while towing a flatbed trailer it would be all over the road so I hooked up my 94 light duty 2500 ( heavy half ton  six bolt wheels) and it pulled the trailer and the same load nice and straight at 65 mph. so figure that one out. took the duramax to the dealer and nothing wrong.  I think design flaw. engineers at gm need a kick in the rear. a lot has to do with how level the hookedup trailer is.  just my thoughts.

bobsiding Enthusiast

bobsiding

Posted
Posted

its me again. just bought a 17 hd gas and while towing noticed the tranny shifting way too many times. in tow mode and manual shift sometimes it cant make up its mind. it down shifts and upshifts at the same time tach will go to 5000 and the when I'm behind the wheel theres a lot of custom words for gm in there. cant they make a vehicle that's a joy to drive instead of one to bitch at on ever steep hill. in the mountain passes its terrible to drive. shifts so many time its sickenning

sdeeter19555 Senior Enthusiast

sdeeter19555

Posted
Posted
Even with 3.73 gears he still should have no problem towing 6000lbs.  Something must be up that a 1500/ 5.3 /3.42 would tow better than a "fleet" 2500.   It should be checked out.  Anything else would be guessing. 
6000 pounds behind a 2500hd with 3.73s does turn them almost into slugs...I know, I have one in the driveway...that, and a 5400 pound camper, and an 18ft 10k gvw equipment trailer, and an 18k gvw 5x8 utility trailer. Yeah, this truck has been used....shoulda, coulda, woulda held out for 4.10s. They are only rated at 9400 pounds towing with 3.73s...just look at a 1500's tow rating.

While they will tow it, a 1500 will feel stronger doing it. My dad's 1500 5.7l Ram tows his tractor/trailer combination (probably 7500 pounds) a LOT easier than my truck does (almost effortlessly)...but controlling it is another story, he gets the pucker factor award. I would rather have a more anemic drive than one with a pucker factor, but hey....

I've actually had my 2500hd with a 3500# camper on a hill in New Hamshire where it couldn't get enough wind to shift into 2nd gear...I wouldn't even think of trying that hill with my 5400 camper.

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2017HD Enthusiast

2017HD

Posted
Posted

Agree the 2500 with 4.10 should out perform the 5.3 with 3.42 gears - I believe that the transmissions are the same gearing so the differences are in the torque/HP and rear end. My old 07 2500HD towed 6000 lb TT with ease. Hills were done in 4th gear at 3500 RPMs and for the most part flats shifted between 5th and 6th - it did not seem to take much to drop between those two.

 

I never tried to tow the same trailer with a 1500 and 5.3. Now my boss tows a large boat with a burb with the same set up as your 1500. It seems to strain more than my 2500 ever did.

 

Probably your 2500 need a tune - maybe a new fuel filter or air filter - you might also try some injector cleaner. Also has your MPG gone down?

TRKLGND Enthusiast

TRKLGND

Posted
Posted

The 6L80 (1500) and 6L90 (2500) are identically geared.  

http://gmauthority.com/blog/gm/gm-transmissions/myc/

http://gmauthority.com/blog/gm/gm-transmissions/myd/

 

The engines also have almost identical torque and hp peaks and the curves are very similar.

The L83 makes 382 lb-ft @ 4100 rpm and 355HP @ 5600 rpm.

The L96 makes 380 lb-ft @ 4200 rpm and 360HP @ 5400 rpm.

http://www.gmpowertrain.com/

 

The difference in they way they pull is the rear end gear AND the weight difference between the two trucks.
Base Curb Weight for the 1500 CC 4x4 is 5321lb.

Base Curb Weight for the 2500HD CC 4x4 SB is 6532lb.

http://media.gm.com/media/us/en/chevrolet/vehicles/silverado/2017.tab1.html

http://media.gm.com/media/us/en/chevrolet/vehicles/silveradohd/2017.tab1.html

 

If you have the L83 / 6L80 combo with the NHT (max tow package) in your 1500 you have a 3.73 rear gear.   HP, TQ, trans gearing and final drive are essentially identical between the L83 / 6L80 / NHT 1500 and a "fleet spec" 2500HD.  The 4.10 gears in the non-commercial 2500HD will help with acceleration whether towing or not but the truck is still 1200 odd pounds heavier than the 1500.  You would need even shorter gears (4.55 ish - I didn't do the math) to overcome the additional weight.

Two other quick points.  First, the NHT 1500 is rare.  I was looking for one before I bought my current truck (see signature).  Was told that less than 5% of 1500's have the NHT package.  Second, acceleration is only a small part of the equation.  Control and stopping are much more important in my opinion.    

i82much Enthusiast

i82much

Posted
Posted

Perhaps the OP's concerns are really about the different shift algorithms used between the two different trucks?  My HD seems to have fairly high RPM shift points, higher than I have ever seen in a 1/2 ton.  

TRKLGND Enthusiast

TRKLGND

Posted
Posted

My 2014 1500 was a screamer.  Not unlike my 2017 2500HD.  All gassers are screamers.  Just look at their torque curves.  They have to be.

dan3415 Enthusiast

dan3415

Posted
  • Author
Posted

I have verified a 4.10 rear end by the glove box code. I’m accepting the idea of the high revs, and completely agree that the 2500 is a better all around towing truck. I’ve had 4 2500 chevys with the 6.0, and ran them all to over 250k miles. I think a tuner is my next buy....maybe wake her up a little bit [emoji106]

 

 

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fjtort2 Enthusiast

fjtort2

Posted
Posted
13 hours ago, dan3415 said:

I have verified a 4.10 rear end by the glove box code. I’m accepting the idea of the high revs, and completely agree that the 2500 is a better all around towing truck. I’ve had 4 2500 chevys with the 6.0, and ran them all to over 250k miles. I think a tuner is my next buy....maybe wake her up a little bit emoji106.png

 

 

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Custom tune really helps out these 6.0s. Tuned mine back in July. 5,000 miles of smiles and power! no issues! 

TRKLGND Enthusiast

TRKLGND

Posted
Posted
2 minutes ago, fjtort2 said:

Custom tune really helps out these 6.0s. Tuned mine back in July. 5,000 miles of smiles and power! no issues! 

That's good.  Because you have no warranty.  If it weren't for the powertrain warranty I would call Black Bear Performance tomorrow.

SierraHD17 Senior Enthusiast

SierraHD17

Posted
Posted

Lol.  Warranty.  Who cares haha.  The power is worth it and the likelihood of one of these failing is almost as good as winning the lottery.  Tuned my 17 when it had 9000 miles on it abd i bought it as a demo with 8000.  Besides... when you can buy a 50000 mile complete pullout (L96/6L90e and the t case) for $2500 it's not even worth thinking about. 

SMiller Senior Enthusiast

SMiller

Posted
Posted
4 hours ago, paracutin said:

That's good.  Because you have no warranty.  If it weren't for the powertrain warranty I would call Black Bear Performance tomorrow.

Lol, flash back to stock, dealer never knows...

 

 

Before you call my bluff there are 1000's of LS motor vehicles that have been through the dealer with zero issues.

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