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You're gears have to match, regardless of your engine. If you have a 4cyl, assuming Noones chnaged the gears, the a 8.8 with 4.10s will work just fine. The 6cyl did not come from the factor with 4.10 gears. Most were 3.07. And theres another ratio that is escaping me at the moment
 

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If your looking to stay at or under a 33's tire..Look for an 8.8 with 4.10's then either do an gear change to the front OR find a front dana 30 from a 4cly, which might end up being cheaper. If you want over 33's then get the best deal on what ever you can find as you will be changing out the gears... Also don't forget to weld the tubes to the diff.
 

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You got the codes to find 4:88s?? If not let me know I can send a couple pages to help you out.
 

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You got the codes to find 4:88s?? If not let me know I can send a couple pages to help you out.
I hope you mean 4:10... 4:88 was not stock for a 8.8

Here is the cheat sheet I used when looking for my 8.8
 

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Yeah my bad I had mine changed to 4:88s and added a grizzly. Still have to install.
 
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