Gears make your car feel like it just underwent a massive weight loss programme. Guys here claiming 4/10th's improvment in the 1/4 mile are not off thier rocker, that is very realistic. 4/10th's in the 1/4mile is like gaining 40hp, or, loosing 400lbs. Gears do not make 1st gear useless, and you'll still cruise thru town in 4th, so, there is no 'additional' shifting. I went from 3.08's to 3.73's and definatly noticed the acceleration difference. Not only did the car accelerate harder, it did so with less effort. It litterally felt like someone puled significant weight out of the car. I then went from 3.73's to 4.10's, and even that difference was very noticable. And, no, first gear is not useless. You'll like the added mechanical advantage of your 3.73's. Enjoy.