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dudg

By dudg
in 2000-2014 Silverado HD & Sierra HD

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dudg Enthusiast

dudg

Posted
Posted

I have a 2005 K2500 suburban with 6.0 and 3.73 gears. It has a tow capacity of 7600 lbs. The 4.10 gears give it a towing capacity of 9600 lbs. Is the gears the only differance making the tranny the weak point of the truck? I can't beleive 3.73 to 4.10 gears will make 2000 lbs towing difference.

pwall Senior Enthusiast

pwall

Posted
Posted

you'd be amazed of what a 4.10 will do.

However, you may want to check your tow numbers. My 2002 with the 5.3l and 3.73 is rated to tow 7600lbs.

I would expect the 3/4ton with the 6.0 to do better.

wellinghurst Enthusiast

wellinghurst

Posted
Posted

I had 3.73 gears in my previous truck=constant downshifting to keep speed/go uphill with my rather lightweight boat.

 

I have 4.10's (actually 3.83's now with my 285 tires) in my '03=almost never downshifting (a little more with the new tires).

 

It's all about saving your tranny from excess work. You motor will go all day, but your tranny won't if it's constantly struggling to keep up.

 

Are you needing to tow more than 7600 lbs.? You'll be ok if you do, and nothing may ever happen, but GM wants to find ways out of paying for it if it does. Lord knows we all overload our trucks form time to time!

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
I had 3.73 gears in my previous truck=constant downshifting to keep speed/go uphill with my rather lightweight boat.

I have 4.10's (actually 3.83's now with my 285 tires) in my '03=almost never downshifting (a little more with the new tires).

It's all about torque multiplication. Torque creates movement. The 4.10 gears transfer the engine's torque to the ground more efficiently.

06yxl2500 Enthusiast

06yxl2500

Posted
Posted

Towing for yukon xl / suburban in 06:

 

2500 4wd

6.0 w/ 3.73: 7,600

6.0 w/ 4.10: 9,600

8.1 w/ 3.73: 10,300

8.1 w/ 4.10: 12,000

 

2500 2wd

6.0 w/ 3.73: 7,900

6.0 w/ 4.10: 9,900

8.1 w/ 3.73: 10,600

8.1 w/ 4.10: 12,000

 

1500 4wd

5.3 w/ 3.42: 7,200

5.3 w/ 4.10: 8,200

 

1500 2wd

5.3 w/ 3.42: 7,500

5.3 w/ 4.10: 8,500

Burbman Enthusiast

Burbman

Posted
Posted

Yes, but since you have 4WD, you need to change both axles, front and rear. Not sure if BryanH's # included that, the link in his post was broken.

 

Figure $600-$700 per axle to have it done at a good shop.

bryanhunt Enthusiast

bryanhunt

Posted
Posted
Yes, but since you have 4WD, you need to change both axles, front and rear. Not sure if BryanH's # included that, the link in his post was broken.

 

Figure $600-$700 per axle to have it done at a good shop.

 

Apparently 4wheelparts is having troubles with that page. Just go to http://www.4wheelparts.com and browse to it.

 

They're running a 15% off front and rear gear set kits. the 600-700 estimate was for the gear set kits. Not labor.

dudg Enthusiast

dudg

Posted
  • Author
Posted

I see a few of you have k2500 suburbans. I have had mine for a little over a month and love it, other than the mileage. I plan on pulling a 8000lbs travel trailer next summer. So until then I plan on beefing it up a little. Maybe a PCM tune, larger tranny cooler, maybe different gears, larger tranny pan. Anybody put in a tranny shift kit? Just in the wishing stage right now. I have all winter.

bryanhunt Enthusiast

bryanhunt

Posted
Posted
I see a few of you have k2500 suburbans. I have had mine for a little over a month and love it, other than the mileage. I plan on pulling a 8000lbs travel trailer next summer. So until then I plan on beefing it up a little. Maybe a PCM tune, larger tranny cooler, maybe different gears, larger tranny pan. Anybody put in a tranny shift kit? Just in the wishing stage right now. I have all winter.

 

I pulled about 7000 lbs a couple times with virtually the same set up you have. I didn't have any upgrades to it and the truck pulled like a charm (granted I didn't do anything serious like the appalacians or rockies...) I did about 5 hours of rolling hills with the cruise set to 70 and it only really had to downshift once or twice on the long uphills.

 

Its a bit funny but the 6.0 doesn't feel like it has all that much power just around town but as soon as you put a trailer on it and put in tow/haul mode the PCM knows what you're up too and just keeps on pullin.

 

Have you pulled yet with it?

 

(no doubt about it though... 4.10s and a tune will really increase towing ability)

bdeboer Enthusiast

bdeboer

Posted
Posted

Maybe a PCM tune, larger tranny cooler, maybe different gears, larger tranny pan. Anybody put in a tranny shift kit? Just in the wishing stage right now. I have all winter.

 

I have the PCM tune, and have increased my transmission cooler with a larger B&M cooler in my '02 suburban.

 

The PCM tune helped me get things rolling faster, and it seems stronger when pulling.

 

I tow a travel trailer that is closer to 5,000 lbs. The thing I have noticed after pulling the trailer up long grades, the engine temperature recovers much quicker than the transmission even with the upgraded cooler. The grades I am referring to are in Pennsylvania and Maryland along I-70. I would probably try a thermostat/fan cooled cooler if I was going to go to heavier a trailer or pull the current trailer out west.

bdeboer Enthusiast

bdeboer

Posted
Posted
I'm not real concerned with long grades. I live in Minnesota. Not many long grades around here.

I live in Ohio, and the cooling doesn't seem to be an issue even in the rolling hills in southern ohio.

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