Questions on rear gear swap?

[quikstang90]

Ok guys, im debating on changing the stock gears in my 14 gt500 to 3:73's. want to hear eveyones opinions if they have done it . Either for it or against it. I know the usual stuff with lower mpg but really didnt buy this car for economy, already using torco in every tank per the tuner. Car is not a dd, but i will be doing the 1/2 mile wanna go fast races in october. Would 3:73 gears have any negative effects here either??


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[railroad]

I am running 3.73's and have no complaints or desire for another ratio. It improves the driving at all levels for me. I am more of a cruiser. You might want to check with some guys that run the 1/2 and 1 mile runs for rpm at the line. 3.55s might be better, no info on this.
Be sure to read all the threads on gear whine and its causes.

 

[Fox&Cobra]

I wanna change mine to 3.73, i have 4.10 and its way to much gear for me mpg sucks so i would say go with 3.73 its a good in between gear

 

[tvspower]

I went from 3:31 to 3:73 to 4:10 and back to 3:73s better all round gear....

 

[quikstang90]

I went from 3:31 to 3:73 to 4:10 and back to 3:73s better all round gear....

What gear set brand did u use and did u get the dreaded rear end whine?


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[Njtony]

Overall driving was way better with 3.73 but the whine drove me nuts.

 

[03kbredfire]

Changed to 3.73. I really like it. I wanted 3.90's but was warned against for noise issues. If I were to do it over I still would consider 3.90's. No concerns negative on 3.73 choice. Great gear for the car.

 

[hostile500]

It all depends what you plan on doing with the car if you are in the high 600 low 700 WHP you can even get away with 3:55. i am at 730whp with 4:10s and it way to much. I am going back to the 3:55 and skipping 3:73s. these cars make enough torque where you can pull the 3:55s. STAY WITH FORD GEARS TOO.

 

[MovingZen]

If you go to 3.73s third gear pulls to 130 mph are over. Other than that, I'm very happy with the swap and wouldn't go back.

 

[50stangpower]

so if you want to go to the track every once in a while with good tires, should I just skip the gears on an 8.8 and put a 9" in? car makes 730 RW. I do plan on cams and OPG's sometime

 

[03kbredfire]

With 3.73 the 6th gear is finally useful. 89 mph at 2000 rpm vs. 1750 rpm for stock gears. This also helps shed light that this is not a crazy short gear. Even with 4.10 gears the 6th gear mph at 2000 rpm is 81. Do not fear the gear.

My current setup is a little over 700 whp. Car has never felt better. If you have not addressed traction concerns then this is all useless.

 

[ZYBORG]

Id be cool of someone did video and data log comparisons.

3.73s would be my gear of choise for a well rounded car.

 

[Drewsky65]

I'd go 3.55
My 2 cents

 

[quikstang90]

With 3.73 the 6th gear is finally useful. 89 mph at 2000 rpm vs. 1750 rpm for stock gears. This also helps shed light that this is not a crazy short gear. Even with 4.10 gears the 6th gear mph at 2000 rpm is 81. Do not fear the gear.

My current setup is a little over 700 whp. Car has never felt better. If you have not addressed traction concerns then this is all useless.

Did u get the dreaded gear whine after your install?


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[03kbredfire]

Did u get the dreaded gear whine after your install?


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I do have gear whine, but it way secondary to stereo, exhaust and supercharger whine. So..... bring it on. The performance outweighs any and all detriments of additional drivetrain noises. I had more noise introduced from lower control arm/torque arm/watts link installation. Gear noise happens partially due to lower gear itself. I would expect more noise from 4.10's and then 4.56's. Not a big deal I guess is what I am trying to say.

 

[quikstang90]

I do have gear whine, but it way secondary to stereo, exhaust and supercharger whine. So..... bring it on. The performance outweighs any and all detriments of additional drivetrain noises. I had more noise introduced from lower control arm/torque arm/watts link installation. Gear noise happens partially due to lower gear itself. I would expect more noise from 4.10's and then 4.56's. Not a big deal I guess is what I am trying to say.

Do u think going to 3:73 gears would hurt if i was wanting to run the car in 1/2 miles races?


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[03kbredfire]

Even with 3.90 gears you can achieve 255mph in 6th @6K rpm. We are by no means gear limited for mph. So 3.73 would help a 1/2 mile run. Seriously, do not fear the gear. Snoopy has a chart for gear choice.

3.73

3.90

4.10

4.56

 

[quikstang90]

Even with 3.90 gears you can achieve 255mph in 6th @6K rpm. We are by no means gear limited for mph. So 3.73 would help a 1/2 mile run. Seriously, do not fear the gear. Snoopy has a chart for gear choice.

3.73

3.90

4.10

4.56

Awesome man. Thanx for the info. I think i am sold on the 3:73's !!!


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[10GT500]

Im running 305/35 MT SS's (28.7" OD). I have 3.73s and was thinking of bumping up to 4.10s due to the tire height. Whats everyone's thoughts on that?

 

[Turbo98GT]

3.73 are bad for 1/2 miles