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Avalanche With 4:10 Gears

BAD2500HD

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BAD2500HD Enthusiast

BAD2500HD

Posted
Posted

My wife just got a 07' Avalanche with the 4:10 gears and locking rearend does anybody know if the MPG would have been better with the 3:73's ? we just got it so we haven't even put a tank of gas through it yet but she heard me talking before she got it that i thought the 3:73 would be better and now she is upset that she will get bad mileage with it , what do you guys think? thanks for the input !

svensk Senior Enthusiast

svensk

Posted
Posted

lmao...no

 

You would probably be kicking yourself if you did get the 3.73 in that size vehicle. It's so big and heavy there will be next to no milage difference between the two gears. But, performance wise you will definitely enjoy having 4.10.

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
My wife just got a 07' Avalanche with the 4:10 gears and locking rearend does anybody know if the MPG would have been better with the 3:73's ? we just got it so we haven't even put a tank of gas through it yet but she heard me talking before she got it that i thought the 3:73 would be better and now she is upset that she will get bad mileage with it , what do you guys think? thanks for the input !

 

Does your Av have the 6.0 liter? if so, you have no choice but to get the 4.10's. You cannot get the 6.0 with 3.73's. At least you couldn't last fall when I was shopping 2007 Avs. That's why I decided to wait for the NBS trucks.

bbb Enthusiast

bbb

Posted
Posted

Its only a 2 hundred rpm difference and usually the 4.10 is better.

caddycruiser Enthusiast

caddycruiser

Posted
Posted

Actually, from what I've read here and on the Avalanche club forum, most people with 4:10's particularly on the new models actually seem to have an easier time getting better mpg numbers than all else, and their trucks more easily kick into V4 mode on the highway. 4:10's keep RPM's a little higher at times, but also help it stay at speed without struggling or shifting as much, which can help in the end for cruising, and does.

 

So, really, I wouldn't regret getting 4:10's over the common 3:73's. You'll get more solid performance all around, and based on others, actually should be able to eek out a tad more in the mpg's regard than if you had the standard.

BAD2500HD Enthusiast

BAD2500HD

Posted
  • Author
Posted
My wife just got a 07' Avalanche with the 4:10 gears and locking rearend does anybody know if the MPG would have been better with the 3:73's ? we just got it so we haven't even put a tank of gas through it yet but she heard me talking before she got it that i thought the 3:73 would be better and now she is upset that she will get bad mileage with it , what do you guys think? thanks for the input !

 

Does your Av have the 6.0 liter? if so, you have no choice but to get the 4.10's. You cannot get the 6.0 with 3.73's. At least you couldn't last fall when I was shopping 2007 Avs. That's why I decided to wait for the NBS trucks.

 

Nope no 6.0L to be honest i haven't seen one with a 6.0 !

BAD2500HD Enthusiast

BAD2500HD

Posted
  • Author
Posted
Shoulda bought a hyndai - You want the big truck - Gotta pay the price.

She just got rid of her 06' subaru she was sick of having to small a rig and sitting on the ground.

caddycruiser Enthusiast

caddycruiser

Posted
Posted

Well, it still stands, at least based on all I've seen, that you'll likely get better (never going to be great, but still) than you would have overall with the 5.3L and 3:73's. And you also might not, it all just depends sometimes. Of course, you won't be able to do direct side by side comparisons, but you can go to places like avalanchefanclub.com and see several examples and discussions on the topic.

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
Well, it still stands, at least based on all I've seen, that you'll likely get better (never going to be great, but still) than you would have overall with the 5.3L and 3:73's. And you also might not, it all just depends sometimes. Of course, you won't be able to do direct side by side comparisons, but you can go to places like avalanchefanclub.com and see several examples and discussions on the topic.

 

FYI,

 

When I was shopping 2007 Avs last year, the 5.3's were rated at something like 15/19 or something close to that with 3.73's. The 6.0 with 4.10's was rated at 11/17. I assumed it was more due to the 4.10's, but I am sure it was a combination. I'm glad I waited for the trucks to show up.

C & A s Dad Senior Enthusiast

C & A s Dad

Posted
Posted

Lloyd, I bought an '02 Yukon XL(see my sig) with a 4.10 gear. I really thought I wanted a 3.73 for better MPG but becasue I was going to be towing a 6500 lb camper I went forward with the 4.10. I have never looked back and for my use, the 4.10 fits my needs perfectly.

 

I am averaging above 18.6 right now with mostly rural drving mixed with some highway. On pure highway driving I can get 21. Not bad for a vehicle this size. If your wife spends a lot of time on the intersate at speeds above 75, the 3.73 would likely get a little better MPG. If she drives on rural roads and around town like my wife the 4.10 will provide better Mileage. Also, if you do decide to tow a camper or boat, you will be very happy you have the 4.10s.

Jim2002Z71 Enthusiast

Jim2002Z71

Posted
Posted
My wife just got a 07' Avalanche with the 4:10 gears and locking rearend does anybody know if the MPG would have been better with the 3:73's ? we just got it so we haven't even put a tank of gas through it yet but she heard me talking before she got it that i thought the 3:73 would be better and now she is upset that she will get bad mileage with it , what do you guys think? thanks for the input !

 

I traded in a 2000 Z71 with 20K mi and 3.73's for an exact copy in a 2002 but with 4.10's...NEVER looked back...got better mileage in Mountains...

C & A s Dad Senior Enthusiast

C & A s Dad

Posted
Posted

I have asked you and asked you to remove the picture of your truck from your posts and you refuse to do so. Each time I see it I have an uncontrolable urge to go the my Dealership and buy a new truck. So far I have been able to control myself but I cannot hang on much longer. :banghead:

 

That is one nice looking truck. :banghead:

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