Originally Posted by Schwheelz
I'm pretty sure the higher the gear ratio the larger the tires you can run? I bet it also makes you crawl alot slower but I bet you could climb alot more I would assume generally the higher the gear ratio the more torque you would have in 4lo? If I'm wrong please correct me
Ok close the higher the number the lower the gear ratio 373:1 is lower than 321:1 or 308:1
Here is the quick and dirty the higher the number the lower the gear ratio means more low end power less high end power.
321 will take a lot more motor to get the tires to turn but will get better gas mileage on the freeway. Trust me though 321 with stock tires will work but the bigger the tire the harder the motor will work to turn them meaning worse gas mileage around town, but better on the freeway. 373:1 is a pretty good average city/highway as far as I am concerned. I think it should be fine up to 35 inch tires unless you do a lot of freeway driving then I with 35's I would recommend 411 - 456. Stock Rubicon's come with 4:11.
Ok so really my suggestion is. get the 373 from the factory if you can. If you didn't or can't and you go 35 or bigger and decide you are going to change gears I would go to at least 411. If you have don't think you can do it later then buy a Rubicon and be done with it.
disclaimer: This is just suggestions based on my experiences. Opinions may differ. If you are a hard core wheeler and rarely if ever drive on the street you can go up into the 5's.
Just remember the higher the number the lower the ratio the more low end power.
If you are into motorcycles you can attain it like doing a sprocket kit
1 down on the front sprocket and two up in the rear will make you pop wheelies but drop your high end speed! <-- if that makes sense to anyone.
...and groundhog day is a great movie!