11-03-2009, 11:54 AM
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#1
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JackedBlackZ71
Join Date: Nov 2009
Location: Metairie
Posts: 11
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Big or small
I am looking for a little more acceleration. I do not know what gears i should get though. I am running 35's with a skyjacker 3" suspension lift. I want to still be able to mess with people on the interstate with top end. I was thinking maybe 4.10 gears
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11-03-2009, 12:04 PM
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#2
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Registered User
Join Date: Jun 2009
Location: skeeterville
Posts: 845
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Re: Big or small
4.56
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2.5 ton rocks, 49" iroks, blown 454, 500 shot of juice, custom 32" ifs lift, head swallowing exhaust tips, Merlin 642, 4L80e, allison, turbo 400, coffee machine, browning stickers, mobile phone car charger.
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11-03-2009, 12:16 PM
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#3
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JackedBlackZ71
Join Date: Nov 2009
Location: Metairie
Posts: 11
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Re: Big or small
how would that affect gas mileage?
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11-03-2009, 12:22 PM
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#4
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Registered User
Join Date: Aug 2007
Location: Kansas City, MO
Age: 26
Posts: 134
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Re: Big or small
you are probably running 3.73's now? 4.56's will just make it easier to get going from a stop and will put you more in the correct power range for your truck while on the highway. 4.56's will just make your transmission happier and not work quite so hard...Honestly, you MIGHT lose a MPG or 2, but your transmission will like you better :)
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11-03-2009, 01:37 PM
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#5
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Registered User
Join Date: Dec 2006
Location: Alliance, OH (Home) Columbus, OH (OSU)
Age: 22
Posts: 205
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Re: Big or small
I am running 315/70/17 tires with 4.56 gears, and on the highway unloaded with my tonneau cover on, I am getting around 17.5 mpg. This was out west going across the mountains from Washington to Wyoming and back.
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'02 Silverado, Superlift FIT, Alcoa Classic Wheels, Wrangler Extreme AT's, 4.56's, Magnaflow Exhaust, Reunel Bumpers
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11-03-2009, 02:11 PM
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#6
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JackedBlackZ71
Join Date: Nov 2009
Location: Metairie
Posts: 11
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Re: Big or small
well im not exactly a granpa behind the wheel, and right now im getting bout 14.5 - 14.8 on highway i just dont want to go below 13 on highway bc then i would get less than 12 in city
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11-03-2009, 02:23 PM
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#7
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Registered User
Join Date: Feb 2007
Location: LA
Age: 23
Posts: 168
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Re: Big or small
jackedblackz71....i have the skyjacker 3" also but with 33's.....would you mind posting a pic of yours with the 35's...im very curious about how it looks
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11-03-2009, 02:43 PM
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#8
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JackedBlackZ71
Join Date: Nov 2009
Location: Metairie
Posts: 11
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Re: Big or small
im not going to lie, i just joined today and i do not know how to had a picture into this reply
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11-03-2009, 03:57 PM
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#9
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Registered User
Join Date: Jun 2009
Location: skeeterville
Posts: 845
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Re: Big or small
your mileage will go up in the city and if your gettin 14 it will go up on the highway as well or it should. it should do better all around.
__________________
2.5 ton rocks, 49" iroks, blown 454, 500 shot of juice, custom 32" ifs lift, head swallowing exhaust tips, Merlin 642, 4L80e, allison, turbo 400, coffee machine, browning stickers, mobile phone car charger.
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11-03-2009, 04:19 PM
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#10
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Forum Leader
Join Date: Nov 2004
Location: Dubuque, Iowa
Age: 27
Posts: 3,821
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Re: Big or small
I agree, city should go up. Your truck does the most work getting going from a stop, the gears will help that.
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11-03-2009, 04:38 PM
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#11
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JackedBlackZ71
Join Date: Nov 2009
Location: Metairie
Posts: 11
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Re: Big or small
ok thats good to know. but how about top end? how bad will the 4.56 hurt me there?
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11-03-2009, 04:40 PM
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#12
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Forum Leader
Join Date: Nov 2004
Location: Dubuque, Iowa
Age: 27
Posts: 3,821
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Re: Big or small
Your rpms will be higher at higher speeds, therefore you will loose some highway mpgs.
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11-03-2009, 04:49 PM
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#13
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JackedBlackZ71
Join Date: Nov 2009
Location: Metairie
Posts: 11
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Re: Big or small
that does make sense. Is there a particular brand that sticks out or that is trusted among truck guys
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11-03-2009, 04:51 PM
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#14
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Forum Leader
Join Date: Nov 2004
Location: Dubuque, Iowa
Age: 27
Posts: 3,821
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Re: Big or small
I think yukon makes good gear sets.
Last edited by oneloudz71; 11-03-2009 at 04:51 PM.
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11-03-2009, 06:19 PM
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#15
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Loving The 3 Speed
Join Date: May 2007
Location: Portage La Prairie Manitoba
Posts: 845
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Re: Big or small
With 4.56s you would get better mileage in town because your truck would be working less to move some stoplights etc. thus saving fuel. Highway should put it back to stock or near.
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355ci-9.6:1 Compression-TBI mods-Vortec Heads-GMPP TBI Intake-Melling Cam-Roller Rockers-Flowtech Headers-MSD Ignition-Super 40's-TB Spacer-AFPR-6" Superlift-36"TSLs-Built Turbo 350
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11-03-2009, 06:57 PM
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#16
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Registered User
Join Date: Oct 2008
Location: eastern shore of maryland
Posts: 100
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Re: Big or small
how much does gears cost? ive always wanted to know
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^Compliments of O4NCZ71^
2000 Silverado 5.3L 1500 4x4,Leveling Kit w/ 3in. Rear Blocks,35x12.50 SS Thornbirds,16x10 Black DC-1's,True Duals No Mufflers w/ 4in. Magnaflow Tips,5% Rear Tint,Tractor Supply Black Truckbox
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11-03-2009, 10:05 PM
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#17
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JackedBlackZ71
Join Date: Nov 2009
Location: Metairie
Posts: 11
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Re: Big or small
I was wondering if a 8.5 inch 10 bolt 4.56 gears are the right ones, i have a 2005 silverado z71
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11-03-2009, 10:14 PM
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#18
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Loving The 3 Speed
Join Date: May 2007
Location: Portage La Prairie Manitoba
Posts: 845
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Re: Big or small
Quote:
Originally Posted by bigluke_chevy
how much does gears cost? ive always wanted to know
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Depends if you install them yourself, and it's definatly one thing you really want to know what you are doing. For two diffs, with labour and parts figure around 2 grand.
Quote:
Originally Posted by jackedblackz71
I was wondering if a 8.5 inch 10 bolt 4.56 gears are the right ones, i have a 2005 silverado z71
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What size tire? For 35s 4.56 are usually about right.
__________________
355ci-9.6:1 Compression-TBI mods-Vortec Heads-GMPP TBI Intake-Melling Cam-Roller Rockers-Flowtech Headers-MSD Ignition-Super 40's-TB Spacer-AFPR-6" Superlift-36"TSLs-Built Turbo 350
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11-03-2009, 10:18 PM
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#19
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JackedBlackZ71
Join Date: Nov 2009
Location: Metairie
Posts: 11
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Re: Big or small
yeah 35s. But idk if the 8.5 inch 10 bolt is the right size.
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11-03-2009, 10:19 PM
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#20
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Loving The 3 Speed
Join Date: May 2007
Location: Portage La Prairie Manitoba
Posts: 845
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Re: Big or small
Your truck a 1500?
__________________
355ci-9.6:1 Compression-TBI mods-Vortec Heads-GMPP TBI Intake-Melling Cam-Roller Rockers-Flowtech Headers-MSD Ignition-Super 40's-TB Spacer-AFPR-6" Superlift-36"TSLs-Built Turbo 350
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