Gearing works great. It sounds ridiculous at 6.15:1 but if you consider the stock tires were 29" tall and it was geared 4.636:1 from the factory then 37s worked out to 5.91:1. I gave her a little boost to account for physically adding a ton of weight to it (really, over 2000#) and the extra help in re-gearing the transmission makes it OK on the street. Trust me when I say she could definitely use some more power, but she has maintained 65-70 mph down the freeway without issue (other than consuming large amounts of fuel).