This is a completely unbiased opinion. The reason I say this is because after I killed my other rear end with 3.73s I did a rear end swap (entire rear end). I was supposed to get 3.73 gears from FRPP and apparently they installed 4.10s. Everything on the box said 3.73's including the shipping documentation. I didn't find out until after 2 months of driving the car (which would be today) that it actually has 4.10s. It's like thinking you are about to drink water and it turns out to be a Sprite and all you taste is the soda. Here are the thoughts and questions I kept asking myself because it didn't seem "normal" compared to my old 3.73's I had. So if you want to know the differences...here ya go. 1. Why am I getting out of 1st gear so quick? These 4.10's rev a lot quicker. 2. I think I'll shift at 2k to save gas. Why am I doing 40 MPH and in 5th gear already? I have to shift at 3k to keep the momentum up with "traffic" and hit 5th pretty quick. 3. Why is my gas mileage so bad? I went from 23-24 MPG on the highway to 20-21 MPG highway. 18 when you mix in traffic. 4. Why is my RPM so high in 5th at 70 MPH? With 3.73's I was about 2200 or so and with these 4.10's I'm at 2500. 5. I'm so glad I got rid of those 3.27 gears I had. I can pass cars so much easier in 5th gear without downshifting. Fact is you can pass cars without downshifting with 3.73's too....it's just easier with 4.10's since you're almost to 3k on the highway! 6. Why are my tires spinning? They never used to spin like this before. Those are all I can remember for now. One issue I did take note on after figuring out I had 4.10's was my SpeedCal. I have it set for 3.73 gears, not 4.10s and my speedo is only 2 MPH less than my GPS.