do 4.10's make the car feel like its pulling harder, or do they make it so that when u shift, it settles in at a higher RPM on the next gear? i know how gears work, im not that much of a no0b, but people say it keeps the engine in the higher RPM band, and it seems like videos i see show 4.10 geared cars shift 1-2 and the rpm's catch at like 5 grand on 2nd gear. this doesnt make any sense, logic tells me it would just multiply the torque and such and make the car pull harder, but have no effect on the gears relative to each other. can someone shed some light?

 

it will feel like you just put a 50-shot of nitrous on the car. the rpms will only change by about 400 in top gear. the gearing ratio (ratio between first/second, second/third) that determines what rpm in the next gear you will be at is set by the tranny gearing, so it wont change...you just get there faster. and for those who say gears make you faster because you get into higher rpm power band quicker, go do some research on "torque multiplication". at any given speed, you should have more rwtq (with the exception of the really high rpms in each gear) because you are a)in a better part of the power band, and/or b)you are in a lower effective gear that stock.

 

Just lower gears in reality. Your shift points and max attainable speed in each gear will change.

Stock Gt manual is as follows. Each shift point is listed in terms of max attainable speed in each gear at 6250 RPM. Of course due to drag, top speed is limited at some point above 150. Below are approximates from a calculator online.

Personally, the factory shift points and spacing seems about perfect for me so far.

3.55:1 final

1--42mph
2--68mph
3--107mph
4--141mph
5--211mph

-----------------
4.10:1 final

1--36mph
2--58mph
3--97mph
4--120mph
5--182mph

 

Thanks, classj, I'm thinking that 3.73 might be the way to go then

 

I just put them in. My car pulls harder AND stays in the powerband moreso than with the 3.55's. Definately work every penny. I love em.

 

Do you really notice that much difference from 3.55 to 3.73?

 

Do you really notice that much difference from 3.55 to 3.73?

 

I have been contemplating this as well, will your car reach top speed faster with 4.11's to the stock 3.55's? Like, will it pull more in 5th cause of the higher rpm? My car seems to die in 5th gear after goin 210km/h+. What kinda of milage differences do you guys with the 4.11's notice as well? Thanks!

 

Can someone post the topspeeds of each of these gears and at which RPM also.

3.55 top speed and RPM -

3.73 top speed and RPM -

4.10 top speed and RPM -

I am curious as to the differences here. I have heard that the top speed differences between 3.55 and 4.10 is almost 40 Mph and 1000 RPM too. Let me know what you guys have come up with. I dont want to put 4.10's in my car and then put my Mustang at 4500 RPM's just to cruise at 100 Mph on the highway.

 

If drag wasent a factor. 35-40mph loss is about right for 4.10 gears compared to 3.55.

But because of drag unless someone has found a lot of room and truly top ended the car with those three gearsets. Your question is going to go unanswered.

One thing is for sure though, with the 3.55's you can hit 140 in fourth if you crank it to 6250. But you can only hit 120 in fourth with the 4.10's.

Personally I am skeptical. Iwould rather have more power than lower gearing. In an older big block musclecar with no overdrive and a four speed with similar ratios to the stang, we switched from 3.23 gears to 3.73 gears and the car actually slowed down. Traction was a problem. Cruising on the highway was a bear. Switched back to the 3.23's car felt like an animal and the car pulled harder through the gears.


Another issue is spacing, it is more of a taste issue.

Right now with 3.55 you can drop into third doing 80mph, hammer it through the powerband, and grab fourth.

With 4.10's there isnt much left in third if you grab it doing 80mph. So if you dont shift to third, you are stuck in the bottom of fourth, below the powerband of the motor.

Doing 55 or so on the highway with 3.55's you can even grab second. With the 4.10's I think you would be in the bottom of third at that point.

Also if you are doing 0-60 runs, I think the car will be faster with the 3.55's. With 4.10's you have to shift to third I believe to actually hit 60. The modern trend with cars is to hit 60 in first or second gear. The shifts do slow the times down.

3.55 has always been the popular street gear choice. 4.10's are more of a track thing when all you care about is doing 1/4 mile runs.