Gears & Axles Driveshafts | Rearends | Differentials | Gears | 12 Bolt | 9 Inch | Dana

373 gear with a 31 inch tall tire =what gear?

Thread Tools
 
Search this Thread
 
Old 03-14-2009, 10:27 AM
  #1  
On The Tree
Thread Starter
iTrader: (9)
 
turbo kid's Avatar
 
Join Date: Jun 2007
Posts: 101
Likes: 0
Received 0 Likes on 0 Posts

Default 373 gear with a 31 inch tall tire =what gear?

I have a pro street car that has a 9 inch in it with a 430 gear and want to go on hot rods power tour and other rod runs and just cruse with the a/c on at 75 mph for hrs.The new set up is this,
2004 ls1
4l80e with a lock up converter
31 inch tall m/t
430 gear
I would like to have a final gear of like a 3.00(ish)I would like the car to have some ***** and mpg all in one.A 3.73???? or???Any advise would be helpful.Thanks Dan

Last edited by turbo kid; 03-14-2009 at 10:36 AM.
Old 03-14-2009, 11:02 AM
  #2  
TECH Regular
 
Magic Man's Avatar
 
Join Date: Nov 2002
Location: Augusta Ks.
Posts: 418
Likes: 0
Received 0 Likes on 0 Posts
Default

I maybe wrong on this but with 3.73 gears and 31" tire this should put you around 3.4-3.5.
Old 03-14-2009, 11:11 AM
  #3  
Launching!
iTrader: (12)
 
jason99frc's Avatar
 
Join Date: Nov 2003
Location: GIVING THE SHOCKER IN ORLANDO
Posts: 250
Received 4 Likes on 3 Posts

Default

My calculator says 3.73 = 3.37
With your setup 75 MPH = 2125 RPM

With the 4.30 = 2450
I dont see a problem with what you have ? Put the car in OD lock the converter and roll.
Old 03-14-2009, 04:15 PM
  #4  
On The Tree
Thread Starter
iTrader: (9)
 
turbo kid's Avatar
 
Join Date: Jun 2007
Posts: 101
Likes: 0
Received 0 Likes on 0 Posts

Default

What is the formula to figure out tire diamater and gear ratio for final gear ratio???
Old 03-14-2009, 04:18 PM
  #5  
Launching!
iTrader: (12)
 
jason99frc's Avatar
 
Join Date: Nov 2003
Location: GIVING THE SHOCKER IN ORLANDO
Posts: 250
Received 4 Likes on 3 Posts

Default

Go to this site it has a good set of formulas for a number of different calculations.

http://www.tciauto.com/Products/Tech...culators.asp#4



Quick Reply: 373 gear with a 31 inch tall tire =what gear?



All times are GMT -5. The time now is 04:21 PM.