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Author Topic: 2007 Avalanche with 6" lift. What gears?  (Read 172 times)

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Spyder7892

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2007 Avalanche with 6" lift. What gears?
« on: 10/29/18 05:21 AM »

Guys,

I have a 2007 avalanche LTZ 6.0 with a 6" fabtech lift running 35's and I am needing to regear the truck.  I do mostly highway drive (not my DD though) but I also tow about 6000lbs about once a month.  I am trying to decide if I should go with the 4.56 or 4.88 gears.  Will the 4.88 make much of a difference over the 4.56 from a towing aspect and also does anyone have a guess at the mpg drop by going with the 4.88 over the 4.56?  Also, where i would love a little extra pulling power will I still be able to run 70 mph with ease running the 4.88 gears?

If anyone could recommend some good gears and a good supplier that would be great.  Also is there anything else I should look at upgrading other than the gears themselves?  I have been running the setup I have for quite some time now (about 90k miles) and while the truck is by no means the quickest, it does what I need it to.

Thanks for the help!
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highflyinbean

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Re: 2007 Avalanche with 6" lift. What gears?
« Reply #1 on: 12/02/18 01:47 PM »

I use YUKON 4.56 in mine, very happy with them.
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james21

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Re: 2007 Avalanche with 6" lift. What gears?
« Reply #2 on: 12/02/18 05:06 PM »

I would stay away from 4.88 unless you plan on going higher and bigger rubber in the future.

I've run 4.56 in my 02 AV for 15 years, I never gave them a second thought. Also if you are really thinking of doing some wheeling, while you are changing gears, you should throw a decent locker in the rear, ditch the POS G80, you'll thank me.
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Avalanche 1500 BLK NFE w/ 4.56, locking Diff & 18inch wheels. MODS: Amber DRLs; Sunroof, Confer Rack; Volant Intake; MSD; NGK Iridiums; Magnaflow SS; PIAA low beams; HID Highs; Mercury Xenon 885 fogs; SOR front, WAAG rear; SS Bug Shield; Predator Dash & Grille lights, Whelen Strobes & TIR3s.
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Next Mods: LA Patented AV Snorkel
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She's All Modded out.
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