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Author Topic: 2007 Avalanche with 6" lift. What gears?  (Read 83 times)

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


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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