the next mod i want to make on my car is the rear gears. which ratio is would be the best for improving my 1/4 mile. im looking at the 3.73 and 4.10 but dont know which to go with or is there a ratio that would be better than those. how much of an improvement in my acceleration will this make

 

I've got 4.10s, they aren't too bad on the road. I'm still learning how to launch properly, so my times suck, but they are a nice gear. The only weird parts is getting used to going through the lights deep in 4th gear. Is this going to be a daily driver, with a little bit of racing, or a lot of racing, with a little bit of driving?

 

it a daily driver with a little bit of racing

 

go with 3.73's

 

Mines a daily driver too, so a 4.10 would be ok if you don't mind a little extra noise on the highway. It really isn't as bad everyone would think. Maybe a 3.90?

 

the noise wont bother me, i dont do that much highway driving anyway. how much of a difference is this gonna makein my launches and overall time.

 

I have 3.73's and I get great acceleration from it. With 4.10's, your car will be screaming before it gets to 100 mph, lol.

 

I would reccomend the 3.73's if you are mostly a daily driver.

The 4.11's and even the 3.91's from what I hear can be a little much for city driving.

 

I have 3.90's in my car and I LOVE THEM. The noise you guys are talking about is the gear whine. It is normal and not that bad just turn your radio up till u get used to it. I have a v8 and with a m6 at 60 i pull ~1500 rpms. With stock ratios it was 1200 rpms. I haven't noticed a bit off difference in the mpg. I have noticed a huge difference in the accelaration. Remember if you change your gears your speedometer and odometer will be off invest in a programmer to change your ratio to make all that read right. Hope this helps.

 

If your car is a auto and you spend a lot of time driving i would go 3.73s. If you dont mind the price of fuel then the 4.10s are not that bad. If your driving a 5 speed car i would say go with 4.10s. And if you have any plans to go M6 or T56 go with the 4.10s