So I’m in the process of going over the car that doesn’t have to do with the engine currently. So I’m torn current between picking a rear gear of 3.73 or 4.10? I wanted to know what people’s experience has been with 4.10? 3.73 is the safe pick I’m aware but I only drive the car about 4K miles a year. I’m in stock size tires currently 285/35/19
3.73 or 4.10 rear gear in a 2010 MY
- Thread starter Ballsgt
- Start date
3.73
Ford Racing gears and install kit
bj
Ford Racing gears and install kit
bj
I just had a 3.90 installed in my '11. It's right on the cusp of not having enough revs when playing on the freeway. It runs up to red line way more quickly than I'm used to from the stock 3.55. It's almost disappointing. I don't get the same long surge of thrust as before, obviously, and it actually makes the car "feel" slower than before when running through the gears due to not feeling the acceleration for as long. If you like to "play" on the highway, you might end up disappointed with a 4.10. IMO, that's too much gear for a car with a 6250 stock red line.
Disclosure, though. My car is much lighter than stock. I've taken over 100 lbs out of the drivetrain alone. So it was already able to wrap the tachometer pretty quickly with the Whipple 2.9 on it. Reducing rotating mass pays huge dividends.
Disclosure, though. My car is much lighter than stock. I've taken over 100 lbs out of the drivetrain alone. So it was already able to wrap the tachometer pretty quickly with the Whipple 2.9 on it. Reducing rotating mass pays huge dividends.
You don't need 4.10's with the power these cars make.
3.73 seems perfect to me.
A lot of the discussion you see about 4.10s is in the 13-14 section. These later models have different gear ratios in the transmission, the most significant of which is first gear. First gear in 07-12 is 2.97, while it's 2.66 in the 13-14. 4.10s make for an awful short 1st gear in 07-12s. 4.10s with the 2.66 first gear is pretty comparable to the 2.97 first gear with 3.73s.
Thanks for y’alls help. I think I’m going with 3.73
4:10s in an 08 with a KB 2.8. These cars have no traction down low in first anyways regardless of gear. Had the 4:10s in for about 8 years and have no complaints either on the street or highway. If your worried about hitting redline to quickly go to a taller tire out back to compesate.
Theese cars are a blast with 4.10 gears although traction is impossible. Once I got used to how crazy the 4.10's were with over 700rwhp, I decided to try to put some power down instead of making smoke. I eventually wound up with the nearly 30" tall 325-45-18 hoosier drag radial which I was still spining to much for the car to be really fast. I gave up and went back to 3.55's. Now that the car is making over 850rwhp with cams and has lost a ton of torque down low.... I feel the 4.10's calling my name again. Just my opinions here.... I have had 3.31, 3.73, 4.10, and now I'm at a 3.55
I love my 4.10s. You have to be real about what youre going to do with the car. If its more street than strip, 3.73. They can be a noisy gear ratio. 4.10 if your going to the track often. Pair the 4.10 with a good bias ply slick like a Hoosier or M/T. They'll expand a little at the top end and effectively reduce your overall gear ratio.
Racing a high torque, manual car at the track on drag radials is asking to bend axles, at least in my personal experience.
***EDIT*** Roll racing is fine on drag radials.
Racing a high torque, manual car at the track on drag radials is asking to bend axles, at least in my personal experience.
***EDIT*** Roll racing is fine on drag radials.
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if you mke the odd trip to the strip 410"s are the best but you need to have at least 28 inch tall rear tires, if not going to the strip the 373's are the answer. I went from 373's to 410's but I visit the strip with nitto NT05R 305 45 18's on the back
I second the 3.73s being the best all-around combo for street/strip. On the highway, you can still cruise at a reasonable RPM with the double overdrive 6th gear. At the track, with the 2.97 first, it makes some steam off the line. Like lexustech said, though, a stick shift with drag radials at the track can be a brutal combo. Sticky track + heavy car + manual transmission + drag radials = Broken parts ($$$).
3.73 gears installed as well. Also upgraded to an Auburn diff as I suspected mine was worn out which, after inspection, was a good hunch. Now both my wheels lock up...no more single wheel burn-outs.
3.73
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