3.42 or 3.73 gears? This is my question.

[CHEVROLADE]

i had a 2000 5.3 ext cab with oem 342s...i did the 373 swap and man it made a great difference...ide do the 373s they are a great all around gear ..you wont lose topend

[00_shortbed]

Thanks guys, i guess i can throw them in to see. I can always go back. Can i get any feedback from other members on what gears they use and tire size?

[CHEVROLADE]

i ran them 3.73s with 29'' tall wheel/tire

i currently run 323s with the 6speed 29'' tire as well

[farmtruc]

I don't think it's worth the swap, id go 4.10's.

[ecld_07]

ran 4.56 and i dont think it fell on its face till 4th but that was 130 mph. do atleast 4.10s

[sierraman]

think about this, how often do you plan on running all out, if alot stick with 3.42's.
if your running racing or towing, lower gears are a must, then go 4.10 or lower.
if you want to dial in your mileage, get on a rpm calculator and find the closest gear ratio: http://www.csgnetwork.com/multirpmcalc.html

[00_shortbed]

Yeah i dont plan on running all out that much, mainly just quarter mile, racing from red light to red light and flooring it on the highway to 100 or so.

[Crazy Blu]

3.90s!!! Or 4.10s they say you can do 140ish in 3rd on 4.10s in my truck I shift to 4th usually so dunno how tall 3rd is exactly on a 29" tire as well...
Im at a high rpm on the hwy but not to bad...