2.79:1 to 4.11 gears?????

[schultzy69 10]

Hey everyone i have been thinking about swapping out the stock 2.79:1 ratio with a 4.11 but i dont want it to be at 3500 rpms at 60mph. But i really want the torque. Right now i have 15x8.5 rims with 275 60 r15 tires that stand 27'' tall and a 4 speed toploader. With the 2.79 ratio it feels like im starting out in second gear every time i take off. My car is just a weekend warrior so im not to worried about long trips on the hwy. Does anyone have a setup like mine? How would it be on the street? Or maybe a 3.74:1 would be better?And suggestions would be gladly appreciated!!!

Edited January 21, 2011 by schultzy69

[maxum96 32]

You're gonna be buzzing it on the highway. You be really surprised what a difference a set of 3.50 or 3.70 gears would make.

[strokedwindsor 11]

yea i have 3.89's on my mach1 with the c-4 trans with 27'' tall tire. sucks on the highway! im going with the 3.50's like i had before.

[Brasil 10]

...i had the 4,11: 1 rear....sucks ! Specialy on the German Autobahn... 60 mph with arround 3600 ..or even more rpm....

went back to the "stock 3,25 : 1..... better.. finaly I went for the 3,00 : 1...

For me the best combo ( 351 W 4 V ..with some upgrades, C 6 with 2000 stall and shift kit...

 

Greetings Juergen

[chillininnh 21]

3.00 or 3.25 would be my choice. I have everything you need brand new never installed for a 3.00 swap into a small bearing 31 spline 9"(purchased from Currie), let me know, could make you a solid deal.

[maxum96 32]

3.00 or 3.25 would be my choice. I have everything you need brand new never installed for a 3.00 swap into a small bearing 31 spline 9"(purchased from Currie), let me know, could make you a solid deal.

 

 

Not much change going from a 2.79 to a 3.00 gear. I ran 3.70 gear on the street with my FMX and C6 and it wasn't bad. When I did 4.11, and later 4.56 gears on the street, that wasn't fun. But no one beat me at stop light racing once I put the 4,000 stall converter in with the 4.56 gears! :w00t:

[ashleesmach1 28]

My cars original gear was 3.00, now it has a 3:50, real good off the line acceleration and decent on the highway

[LoneWolf2U 136]

For a weekend car, going more than the 3.70's will be too much for street driving, unless you are just going from stoplight to stoplight and not wishing to pass the next fuel station.

 

I'm running a 3.5 rear and the 4spd with good off the line results and fair freeway speeds rpm.

Last long run it adv 16.8 mpg at 70mph.

[Trav_450R 10]

If i was you I'd prob go with 3.73s, Im running 4.11s with a C4 and im tachin about 3500 3600 at 67 mph down the road.

[schultzy69 10]

Thanks for all the comment guys. I decided to go with a 3.50:1 ratio instead of a 4.11. I think it will go better with my setup and plus i got a really good deal on a ring and pinion.

 

Also does anyone have a good HOW TO on a ring and pinion swap? I have found a couple but there not specific to a 9''. I have done a lot of research so im not 2 worried about the swap but It would be nice to here some good advice before i tear apart my 3rd member.....

[maxum96 32]

Having run all different gear ratios from 2.79 to 4.56 in vintage Mustangs, I think you made a good choice with the 3.50 gears.

 

You need the correct tools to install the gears. You'll need a dial indicator and a magnetic base for it. Also I would buy a 9" kit that includes all the pinion shims, crush collar, and marking compound to set your gears up. It's not hard to do. But if you don't do it right, you'll have all kinds of problems.

[Boogerschnot 12]

Yea. I killed a set of 4.11 gears on my first try. Didnt make it three blocks before it locked up on me. Ive got a few build pages saved that i will try to get back and post for you.

[StephenC 10]

I have a brand new 3.55 from Richmond with installation kit I would be willing to sell if your interested. IMO I have 4.11 in my 69 FB and even with a 4R70W 4 speed with OD 4.11 still suck I do about 2300 RPM at 65 MPH on the highway

[ragtopjames 10]

Hey everyone i have been thinking about swapping out the stock 2.79:1 ratio with a 4.11 but i dont want it to be at 3500 rpms at 60mph. But i really want the torque. Right now i have 15x8.5 rims with 275 60 r15 tires that stand 27'' tall and a 4 speed toploader. With the 2.79 ratio it feels like im starting out in second gear every time i take off. My car is just a weekend warrior so im not to worried about long trips on the hwy. Does anyone have a setup like mine? How would it be on the street? Or maybe a 3.74:1 would be better?And suggestions would be gladly appreciated!!!

 

I went from 2.73's to a 4.10 in my 92 with a 5 speed and it revs at 2,500 at 70 . That extra gear drops the rpm's about 600 . If you want that much gear I would recommend swapping trannies . 5 speed or AOD . I can drive mine anywhere I want and in hot weather too .

[schultzy69 10]

I went from 2.73's to a 4.10 in my 92 with a 5 speed and it revs at 2,500 at 70 . That extra gear drops the rpm's about 600 . If you want that much gear I would recommend swapping trannies . 5 speed or AOD . I can drive mine anywhere I want and in hot weather too .

 

Ya i decide to go with 3.50 gears instead of the 4.11's.I think it will go good with my setup. i got the gears in the mail but now im just waiting on the rebuild kit.