Rear gear

[Tony ynot]

I have a 2002 1500hd 2wd with 6 in lift 35 1250 17 tires truck came stock with 373 gear I want to change gear so it drives like it did factory I was told to run a 456 or 488 rear gear any ideas 

[CamGTP]

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.

[newdude]

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 February 22, 2022 by newdude