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Rear gear

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Yes, you do want different gears for sure.


Go with 4.56's at a minimum. Going to 4.88's isn't a bad option either but I don't know how you plan to use your truck.


My opinion is 4.10's with 33's, 4.56's with 34 or 35's and 4.88's with 37's on a 4 speed auto. It would be different on a 6 speed or 8 speed auto. Or if all this thing did was tow heavy trailers under 65mph then 4.88's would be a beast and have far more mechanical advantage around town and getting up to speed.

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4.56 would be closest to stock, actually when calculated out, better than stock 3.73.  It would be more like if the truck came with around a 4.10 gear.


Make sure when you are gear shopping, 1500HD uses the 9.5" 14 bolt semi float axle and not the 10.5" 14 bolt full float axle.  


GM 9.5" Rear, '97-'13, 14 bolt cover (yukongear.com)




Edited by newdude
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