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Which gear ratio's are best

trever1t

Which would be the best for my application?  

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trever1t Enthusiast

trever1t

Posted
Posted

Well i was thinking of changing out these 3.42's for somthing slightly lower but cant decide which to choose! :D

Most of my driving really is 5 miles each way to work, say 90% during the week, and only moderate highway trips on the weekend of around 30-50 miles each way. When on the highway i like to cruise at 75 but have been seen doing 90 for a stretch :cool:

Help me decide my fate!

 

Current running gear is 265/70/17 Will probably go to 285/70/17 next year!

 

Oh yeah, tell me what you run and why you chose one over the other, please!

6.slow Enthusiast

6.slow

Posted
Posted
Well i was thinking of changing out these 3.42's for somthing slightly lower but cant decide which to choose! :D

Most of my driving really is 5 miles each way to work, say 90% during the week, and only moderate highway trips on the weekend of around 30-50 miles each way. When on the highway i like to cruise at 75 but have been seen doing 90 for a stretch  :cool:

Help me decide my fate!

 

Current running gear is 265/70/17 Will probably go to 285/70/17 next year!

 

Oh yeah, tell me what you run and why you chose one over the other, please!

 

 

 

 

I'd think the 3.73's ought to be good. I"m running 4.10's (actually 3.82's now with the 285's) After having the truck for nearly a year, I still keep checking to make sure it's not in 3rd because she runs a little high around 60mph. Doesn't sound like you do any towing. Gas mileage a factor?

trever1t Enthusiast

trever1t

Posted
  • Author
Posted

Yeah, kinda concerned about MPG. I mean i run a Wester's tune and only use premium brand name gas, not overly concerned but also thinking of long term wear on the motor, running at higher rpm's all the time!

NONSTOP SPEED Enthusiast

NONSTOP SPEED

Posted
Posted

Have you looked into the cost of having the gears changed? My dad was gonna go to 4.10's in his 05 duramax dually because the d**n thing was gutless compared to his 01 8100 and it was gonna be like 4g's with the 4wd.

trever1t Enthusiast

trever1t

Posted
  • Author
Posted

$1000 parts and labor for front and rear, not including my choice of LSD.

 

So far its a close race on the choices, just like i feel, not a clear cut answer here yet!

MS3DALE Senior Enthusiast

MS3DALE

Posted
Posted

I like my 3.73's.

As everyone else said about them,It's a good all around mix of power and gas mileage.

trever1t Enthusiast

trever1t

Posted
  • Author
Posted

3.73 has almost double the vote! I am inclined to agree, even though the 4.10 would be a kick in the pants, the 3.73's just make more sense! I really dont plan on lifting my truck and if i can ever afford $3k on a good lift and tires, i can afford to re-gear!

trever1t Enthusiast

trever1t

Posted
  • Author
Posted

If you are running one of these choices please tell me why you voted and what gear/tire size you're running, thanks.

fossil Enthusiast

fossil

Posted
Posted

I got 4.10's. Same year and model as you looking at the truck picture. I get a consistent 25 mpg highway(at 65-70mph) and 21 mpg city. Thats on a Canadian gallon which is slightly bigger than a US gallon. 95% of the dealers here bring in their new stock with 4.10 gears. According to dealers, they actually get slighter better mpg as the engine is operating in a more efficient torque/power band and you have the added power and torque. Likewise with the 5.3l engine vs the 4.8l which they also try to avoid. I think the 3.73's would be more suited to a truck with the 6L engine as even with mine with the 4.10's when I get into the mountains, the 5.3L seems to be a bit underpowered compared to my former 5.7L which had the 3.73's.

trever1t Enthusiast

trever1t

Posted
  • Author
Posted

Thanks Fossil! What size tires are you running and how much larger is the Canadian gallon! Wow, i'm getting 18.5 on the highway with 3.42's!!

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