Figuring axel ratio ??
Logistics Pro
Joined: Jul 2003
Posts: 3,595
Likes: 52
From: Lawton, Oklahoma
Figuring axel ratio ??
Your Ford's axle ratio on rear wheel drive is on a tag on the final drive assembly (pumpkin). Look on the tag for a decimal number like 3.55 That will be the ratio.
Here are some neat calculators..
http://www.jeepster.org/swchapter/calculation.html
Here are some neat calculators..
http://www.jeepster.org/swchapter/calculation.html
Last edited by HomerWinzlow; Aug 3, 2003 at 04:14 PM.
Senior User
Joined: Jun 2003
Posts: 434
Likes: 0
From: Hawaii
Figuring axel ratio ??
Homer, I went to the link you provided, good info. I was wondering what the original tire size has to do with the equation. I don't know what the original tire size is and the door jam sticker is damaged where it lists the original tire size.
New User
Joined: Mar 2013
Posts: 9
Likes: 0
From: Idaho
Gear ratios / Original tire size . . .
The gear ratios are important as to how many turns the driveshaft
turns for every ONE turn of the wheel .
The height of the tires , or more accurately the circumference =
The outer diameter length in inches .
Very important to how many turns it will take to " do " a mile .
Gear Ratio Calculator
I have an old truck that has the original tire size listed :
{{{ only as 6.00 X 16 }}} can anyone tell me how that equates into our NEW world of tire dimensions ?
I am using the tire size of 235 / 75 R / 15
although , besides the rim size being smaller than original ,
Something tells me that just by having a " wrong " rim size makes
the speedometer inaccurate .
Ok, I've done plenty of rambling ......
To get back to your question / answer :
I suspect that if you were to check back to when your truck was new ,
there ought to have been a brochure or some other info page , etc ,etc ...
All for now ,
Tim
turns for every ONE turn of the wheel .
The height of the tires , or more accurately the circumference =
The outer diameter length in inches .
Very important to how many turns it will take to " do " a mile .
Gear Ratio Calculator
I have an old truck that has the original tire size listed :
{{{ only as 6.00 X 16 }}} can anyone tell me how that equates into our NEW world of tire dimensions ?
I am using the tire size of 235 / 75 R / 15
although , besides the rim size being smaller than original ,
Something tells me that just by having a " wrong " rim size makes
the speedometer inaccurate .
Ok, I've done plenty of rambling ......
To get back to your question / answer :
I suspect that if you were to check back to when your truck was new ,
there ought to have been a brochure or some other info page , etc ,etc ...
All for now ,
Tim
New User
Joined: Mar 2013
Posts: 9
Likes: 0
From: Idaho
It'll be necessary to pull the gears out of the rear axle . . . . .
On the FORD 9 inch it's also needed to remove the driveline from that U - joint . .....
I'm told that the ratio numbers are stamped into the ring gear .
OTHERWISE : it's stamped into a tag ( supposed to be ) bolted to the rear housing .
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