Another dam gear question!

cold96snake · May 4, 2004

I have 4.10's and was wondering if there are any similiar gear set-ups that would be the same except 5th would be just like 2.73 gears. that way you'd get all the pulling power up to and over 110 mph, but a better cruising/gas mileage/noise level than what i have now in 5th.

Aaron 4.6 · May 4, 2004

Yes, that is a possibility, but in this case you would need to modify the gear cluster in the transmission case instead of just the final drive ratio.

WhiteDevil69 · May 4, 2004

cold96snake said:
I have 4.10's and was wondering if there are any similiar gear set-ups that would be the same except 5th would be just like 2.73 gears. that way you'd get all the pulling power up to and over 110 mph, but a better cruising/gas mileage/noise level than what i have now in 5th.

Nah, my 3.73's are basicly the exact same as my 3.23's were when im in 5th, slightly higher but hardly noticable, basicly you either drop to 3.73's or get a louder sound system If someone did come out with some gears like that though they would make a killing

Edit: I guess anything is possible of course, just gotta be willing to drop way too much money

cold96snake · May 4, 2004

Aaron 4.6 said:
Yes, that is a possibility, but in this case you would need to modify the gear cluster in the transmission case instead of just the final drive ratio.

Well, i don't reallly care what the final drive ratio is, just wondering why the gear cluster couldn't be made that way to begin with. Call it what you want.

cold96snake · May 4, 2004

WhiteDevil69 said:
Nah, my 3.73's are basicly the exact same as my 3.23's were when im in 5th, slightly higher but hardly noticable, basicly you either drop to 3.73's or get a louder sound system

I know what the current options are, but just wondering why 5th couldn't be produced from the factory at a much lower ratio, comparable to 2.73's 5th ratio. Couldn't it just be marketed as "4.10's but with a 5th gear overdrive"

cold96snake · May 4, 2004

WhiteDevil69 said:
If someone did come out with some gears like that though they would make a killing

Exactly why i'm asking the question, seldom does an oppurtunity to make a killing pass by, especially in the mustang aftermarket.

Aaron 4.6 · May 4, 2004

cold96snake said:
Well, i don't reallly care what the final drive ratio is, just wondering why the gear cluster couldn't be made that way to begin with. Call it what you want.

Are we talking apples to apples here? No matter what changes you make to the ring and pinion in the differential housing, the change will be a global change that affects all the drive ratios equally. 1st gear will be affected as much as 5th gear.

The only way to accomplish the change you describe is to swap out the 5th gear assembly inside the transmission. Factory stock is 0.62:1 if I remember, and you would probably rather see 0.50:1 ala the F-body spec T-56 transmission. Such a swap can be considered, but the labor is much more involved than a ring and pinion swap.

The factory has researched gear ratios to death and they are designed to appeal to the average buyer and meet federal fuel mileage requirements. The idea that they would custom tailor a gearset that would only appeal to a tiny fraction of customers while requiring separate fuel mileage testing is pretty naive and short-sighted in my opinion.

cold96snake · May 4, 2004

Aaron 4.6 said:
Are we talking apples to apples here? No matter what changes you make to the ring and pinion in the differential housing, the change will be a global change that affects all the drive ratios equally. 1st gear will be affected as much as 5th gear.

The only way to accomplish the change you describe is to swap out the 5th gear assembly inside the transmission. Factory stock is 0.62:1 if I remember, and you would probably rather see 0.50:1 ala the F-body spec T-56 transmission. Such a swap can be considered, but the labor is much more involved than a ring and pinion swap.

The factory has researched gear ratios to death and they are designed to appeal to the average buyer and meet federal fuel mileage requirements. The idea that they would custom tailor a gearset that would only appeal to a tiny fraction of customers while requiring separate fuel mileage testing is pretty naive and short-sighted in my opinion.

I didn't necessarily mean FMC when i said the "factory" i simply meant "a" factory that produced gears, otherwise we would all have 4.10's.

I guess your first paragraph anwered my question. That it is "global change" on gear ratio's, not an individual gear swap that has happened when you go from 2.73's to...

So you would need a whole new transmission to get the desired results?

Bullitt_#1346 · May 4, 2004

Yes, you would need at least to have your transmission rebuilt with a different fifth gear. The best option to do what you want is to get a 6 speed transmission with a .5 ratio for sixth gear like the vette, viper, or f-body.

cold96snake · May 4, 2004

Aaron 4.6 said:
The only way to accomplish the change you describe is to swap out the 5th gear assembly inside the transmission. Factory stock is 0.62:1 if I remember, and you would probably rather see 0.50:1 ala the F-body spec T-56 transmission. Such a swap can be considered, but the labor is much more involved than a ring and pinion swap.

.

That is exactly the question i was asking, why can't the "5th gear assembly" in aftermarket gears be 0.62 to 1.? I didn't ask this question to be flamed. Just wasn't sure how to phrase it. And I'm probably older than you are so take it easy, we all have a few things to learn or maybe think anew.

Phoenix00GT · May 4, 2004

Buy a new tranny. I promise it will be about the same price to do that as to have a .5:1 built for yours and the install costs would be equal between the two.

03poontanggt · May 4, 2004

Dude, I don't think anybody was flaming you and age really doesn't make any differance here. The transmition gears are the problem, not the 4.10. The fith gear in the tranny is too low for high crusing speeds with the 4.10's

cold96snake · May 4, 2004

Aaron4.6
Sorry about being naive, i just re-read your post and you are right i am ignorant when it comes to how tans. and differentials work. Just so I get this straight : when i "change the gears/gear down" I'm really just changing the "gears" in the differential?

03poontanggt · May 4, 2004

yup. It makes all the gears higher or lower not any individual one

cold96snake · May 4, 2004

03poontanggt said:
Dude, I don't think anybody was flaming you and age really doesn't make any differance here. The transmition gears are the problem, not the 4.10. The fith gear in the tranny is too low for high crusing speeds with the 4.10's

Just got a little defensive when the words "naive" and "short-sighted" were used.

cold96snake · May 4, 2004

03poontanggt said:
yup. It makes all the gears higher or lower not any individual one

Thank you. And thank all of you that contributed to this thread.
I am a smarter man now.

03poontanggt · May 4, 2004

hey and by the way you can't be too old your birthday in your profile it says your birthday was march 2003, that only makes you 14 months old. By the way you were talking I thought you must have been 30 or something old like that

lwkauble · May 4, 2004

cold96snake said:
Just got a little defensive when the words "naive" and "short-sighted" were used.

Just to throw a monkey wrench into the whole mess here, I have been taking to the BMW instructors at the BMW school here in Fremont, ca, they told me a while back that one of the new BMW's coming out has a variable computer controlled final gear ratio for off the line performance and economy. crazy and expensive but available.

cold96snake · May 4, 2004

03poontanggt said:
hey and by the way you can't be too old your birthday in your profile it says your birthday was march 2003, that only makes you 14 months old. By the way you were talking I thought you must have been 30 or something old like that

I'm a quick learner, when i turn 16 months i actually get to drive
30 somethings

cold96snake · May 4, 2004

lwkauble said:
Just to throw a monkey wrench into the whole mess here, I have been taking to the BMW instructors at the BMW school here in Fremont, ca, they told me a while back that one of the new BMW's coming out has a variable computer controlled final gear ratio for off the line performance and economy. crazy and expensive but available.

Makes me wish my cars were worth more than my house.

Another dam gear question!

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