Figuring Final Gear Ratio?

[GRAYPNY]

OK I need some help from you math wizards. I have 255/50-17 tires and wheels. The dia. is 27.03 and if I am running 3:73 gears what is my final gear ratio?

Thanks~

 

[psfracer]

Assuming you had the stock pirelli 235/55/17's, which are listed at 27.1" tall, your final ratio using a 27.03 tire with 3.73's would be little difference: 3.75

 

[Royb]

OK I need some help from you math wizards. I have 255/50-17 tires and wheels. The dia. is 27.03 and if I am running 3:73 gears what is my final gear ratio?

Thanks~

use this no math required

http://www.svtoa-atlanta.org/cgi-bin/trans.cgi

 

[Hawgman]

I guess eventually I should make this a sticky so I can quit retyping it.

stock tire height divided by new tire height times gear ratio = actual gear ratio.

So as psfracer stated, assuming your stock tires were 235/55/17s:
27.18 / 27.04 * 3.73 = 3.749

 

[travelers]

I guess eventually I should make this a sticky so I can quit retyping it.

stock tire height divided by new tire height times gear ratio = actual gear ratio.

So as psfracer stated, assuming your stock tires were 235/55/17s:
27.18 / 27.04 * 3.73 = 3.749

Yea a stickie might be what the doc ordered.

 

[TexasKyle]

use this no math required

http://www.svtoa-atlanta.org/cgi-bin/trans.cgi

Is there a calc for us Auto guys?

 

[MikeVistaBlue06]

Is there a calc for us Auto guys?

You can do it by hand knowing the transmission gear ratios

See attached photo showing comparison of manual transmissions to automatic transmission.

Mike

 

[Hawgman]

Why would it be any different for an auto? You still have tires, you still have a differential with gears in it...it's gonna be the same.

 

[TexasKyle]

Thanks Mike. Maybe my internet searching sucks, I wasnt able to find anything like that.

Math..that I can do. thanks again.

 

[TexasKyle]

You can do it by hand knowing the transmission gear ratios

See attached photo showing comparison of manual transmissions to automatic transmission.

Mike

I was wanting it for general info Hawg. Not just to know final gear ratio.

 

[2k05gt]

Why would it be any different for an auto? You still have tires, you still have a differential with gears in it...it's gonna be the same.

My Calculator takes all this into account...
Try using my Calculator I created for the S197 stangs..

http://home.comcast.net/~swieduwilt01/Mustang_Calculations.xls

I guess eventually I should make this a sticky so I can quit retyping it.

Or you could just use my calculator...