Home Resources Forums Nationals Meets Store
04/24/14 02:43 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Welcome to the Chevy Avalanche Fan Club of North America

Become a Supporting Member

Visit the CAFCNA General Store

 
   Home   Help Search Login Register Bookmark  
Advertisement
Put your advertisement image here...


Advertisement
 
Pages: [1]   Go Down
  Print  
Author Topic: 3.42 Gear Ratio vs. 4.10  (Read 2701 times)
0 Members and 1 Guest are viewing this topic.
MrOutdoorsie
Member
**
Offline Offline

Posts: 16

I love my Chevy Avalanche


Awards
« on: 12/02/05 04:01 PM »

I'm trying to decide what gear ratio to go with for my new '05 or '06 AV.  I don't do any trailering, really, and don't plan to any time soon.  Most I'd do is hauling a motorcycle or two in the back or some big Home Depot runs.  But I do live in Colorado, and I drive in the mountains quite often.
I'm more concerned about gas mileage than towing capacity.  Does anyone know the difference (if there is any) between the 3.42 rear end, and the 4.10, gas mileage wise?
Thanks!
Logged

2006 Avalanche 1500 Z71 LOADED!
nfhjr
Charter Member
Full Member
*
*
Offline Offline

Posts: 1,901

I love the Chevy Avalanche!


Awards
« Reply #1 on: 12/02/05 04:48 PM »

If 3.73 is available go for them
                                                      Huh Huh
Logged

NFHJR
Phila. Pa.
Pewter Z71
Waag Grill Guard
Amber DRL
Drawtite Window Shades                                NRA PATRON MEMBER
Member 109
PUNISHER
Full Member
******
Offline Offline

Posts: 12,576



Awards
« Reply #2 on: 12/02/05 04:50 PM »

   there are a lot of discussions about this in the Buyer Questions & Answers and the Towing & Hauling sections.
Logged

AVALANCHE PICS
-traded 02 Z-66 for an 04 DBM Z-71
-traded 04 DBM Z-71 for a Lexus IS250
GTG's-DE, VA, TX, GA, MD, SC
Prime Power
Full Member
******
Offline Offline

Posts: 2,419


Customize or it's not yours


Awards
« Reply #3 on: 12/02/05 07:21 PM »

You pretty much know the answer I think.  I tow a camper trailer, around 3500 lbs. and have no problem.  I believe mine are 3.73 though.  But if it is gas mileage you seek, go for the 3.42s.  Also see what the difference in towing is, I'm sure the 3.42s will tow what you need.  Your new truck will have more than enough power to go up the mountains.  And if you disagree, just mod like the rest of us.  We'll help 
Logged
KY_BOB
Full Member
******
Offline Offline

Posts: 8,080


I loved my S.L.U.T.: Sport Luxury Utility Truck


Awards
« Reply #4 on: 12/02/05 07:26 PM »

I like my 4.56's   Cheesy


Gas milage: 15mpg if you baby it. 
Towing capicity: unknow, but great

Stepping on the gas and it doesn't feel like your in a 6000# truck: priceless   

Logged

Gone but not forgotten...

02 Z-71  Vortech supercharged 3.12 pulley 10psi, 212/218 .558/.563 comp cam, LS6 valve springs, SMC meth injection, 42# injectors, Flex-a-lite Efans, 3"body lift, 33 12.50-17 procomp AT, 17x9 procomp wheels, AVIC-N2 NAV, 4.56 gears, 2500 stall converter, transgo HD2 shift kit, Vette servos, 80mm BBK throttle body, Edelbrock headers, custom exhaust, Cold Fusion nitrous, and too many more mods to list.

Tuned with HPTuners
8.86@77.87mph in the 1/8th
Avialanche
CAFCNA 2003 Supporting Member
Full Member
*
Offline Offline

Posts: 1,608

Ace & Arlo


Awards
« Reply #5 on: 12/02/05 07:48 PM »

I'd go with the 4.,10's,  the altitude robs the engine of HP, approx 7-10 loss, to make up for it go with the 4:10's, you'll be glad you did, with all the hills in the Denver area you'll be downshifting out of overdrive all the time just to accelerate on the hwy with the 3.42's
Logged

2004 DGM 2500 4x4 Fully Loaded, Z85 Off-Road PKG, 4:10's, 33" Tires, 3" Body Lift, Strobes, 5000K Low Beam HIDS, 4300K Fog HIDS, Deep Sump Finned Trans Pan, Hitch Electrical Plug Relocated to Bumper, Wait-For-Me-Performance Tune, Y91 Luxury Navigation System with Aux DVD Player/TV Tuner, Rear DVD Player, Tint, Iridium Plugs,
BUDMAN
CAFCNA 2003 Supporting Member
Full Member
*
Offline Offline

Posts: 1,948


2008 Chevy 2500 HD Duramax/Allison Crew Cab


Awards
« Reply #6 on: 12/02/05 08:11 PM »

I like my 4.56's   Cheesy

Gas milage: 15mpg if you baby it. 


You're kidding, right?  15 with 4.56 gears?  Downhill all the time? Big laughter with tears  jk-Mine never saw 15.

4.11's would be much better in CO with the hills. You would have to mash the gas lots more to get it going with the 3.42's.

Logged

Lil Black AV
Prime Power
Full Member
******
Offline Offline

Posts: 2,419


Customize or it's not yours


Awards
« Reply #7 on: 12/02/05 08:19 PM »

I guess it also depends on how much modding you plan to do.  I have done just about every power mod except a blower and will take hills like crazy with my 3.73's.  No downshift, but that is aided by my custom tune.  So look into how many mods you plant to do, multiply that number by 3, and consider that in your decision. 
Logged
DougD
CAFCNA 2010 Supporting Member
Full Member
*
*
*
*
*
*
*
*
Offline Offline

Posts: 20,257


So, didja?


Awards
« Reply #8 on: 12/02/05 08:20 PM »

If 3.73 is available go for them
 Huh Huh

3.42 replaced 3.73 for '05+

Still just two options, now 3.42 or 4.10.
Logged

2003 Victory Red WBH Z66.  Suburban moldings.  Color-matched handles.  K&N FIPK-II.  Dynomax Cat-Back.  DVD/TV & Vizualogics.  Ambers.  Silverstars Hi, Lo & Fog.  Police Pursuit wipers.  Dually rear clearance light (still in the box).
BajAv
Full Member
***
Offline Offline

Posts: 228


Awards
« Reply #9 on: 12/02/05 09:33 PM »

My 4.10 just gave me a 16.78 time at 81.92 mph in the 1/4 mile at Bithlow.  Respectable I think for a completely stock AV with 7500 miles. Cool!
Logged
twcarmichael
Full Member
***
Offline Offline

Posts: 142


Modding starts NOW!


Awards
« Reply #10 on: 12/08/05 12:09 PM »

I ordered my '06 with 4.10 gears and am pleased.  A few steep hills here in town and the beast crawls up with very little effort.
I don't know how accurate the DIC MPG estimator is, but I've gotten a steady 18 MPG on the freeway at 65-70 MPH.  Really bad though in town, in traffic...like, 11 MPG.
I haven't driven and AV with 3.42s, but my 4.10s are GREAT in stop-and-go traffic, too.
Logged

2006 Dark Gray Metallic Z66, cladded, cloth buckets, factory roof rack, TNR, XM (with new ONStar antenna), sunroof.  Mods: ambers, Maglite mod ... and more to come ...
MrOutdoorsie
Member
**
Offline Offline

Posts: 16

I love my Chevy Avalanche


Awards
« Reply #11 on: 12/08/05 04:53 PM »

Thanks for the replies, everyone.  This thread, plus some on the Towing/Hauling threads have pretty much convinced me to go w/ the 4.10's.  After all, I'm not buying this thing for it's fuel economy.  But every little bit helps, ya know?

But now I have another question.  Would the Z71 package, with it's 17" wheels necessarilly get better or worse fuel economy than one of it's simarly equiped 16" wheeled cousins?
Logged

2006 Avalanche 1500 Z71 LOADED!
DougD
CAFCNA 2010 Supporting Member
Full Member
*
*
*
*
*
*
*
*
Offline Offline

Posts: 20,257


So, didja?


Awards
« Reply #12 on: 12/08/05 04:58 PM »

Thanks for the replies, everyone. This thread, plus some on the Towing/Hauling threads have pretty much convinced me to go w/ the 4.10's. After all, I'm not buying this thing for it's fuel economy. But every little bit helps, ya know?

But now I have another question. Would the Z71 package, with it's 17" wheels necessarilly get better or worse fuel economy than one of it's simarly equiped 16" wheeled cousins?

Equipped otherwise identically (4x4, same gears), the mileage really won't differ.  The rolling height of the two wheel/tire combos is fairly close.
Logged

2003 Victory Red WBH Z66.  Suburban moldings.  Color-matched handles.  K&N FIPK-II.  Dynomax Cat-Back.  DVD/TV & Vizualogics.  Ambers.  Silverstars Hi, Lo & Fog.  Police Pursuit wipers.  Dually rear clearance light (still in the box).
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2011, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.08 seconds with 22 queries.
Official SEMA Member ChevyAvalancheFanClub website are the rightful owners as indicated in the ALT TXT tags provided.  Chevrolet, Chevy, Avalanche, PRO-TEC, PASSlock, Midgate, the Chevrolet bowtie logo, Avalanche logo, and their images are registered trademarks of the General Motors Corporation and are used with kind permission as approved by Chevrolet Public Relations, Chevrolet Brand Management, and the Chevrolet Legal Department (thanks Chevrolet!).  OnStar and it's logo are the property of OnStar.  XM, XM Radio, and the XM logo are property of XM Radio.  I'm just a little guy so don't even think about suing me.  It's recommended you read the Privacy Policy and Terms of Use of this website.  The Chevrolet Avalanche Fan Club of North America is a proud member of SEMA, the Specialty Equipment Market Association.  All content appearing on this is protected under international copyright , 2002 to 2008, All Rights Reserved