where can i learn about gears ?

what my stock f150 has.
what they do.
will having a specific one help me with gas mileage and my 33" tires.... etc..

 

In short, your rear gear ratio tells you how many times the driveshaft turns in relation to one complete revolution of the driven wheel. For example, if you have 3.55 gears, your driveshaft turns 3.55 times each time the driven wheel turns one time. The higher the number, the lower the gear. For example, 3.08 gears are higher than 3.55's, and 4.10's are lower than both of them. Higher gears (lower numerically) are better for highway driving, or for a higher top speed, because the engine doesn't have to work as hard. Lower gears are better for towing, off-roading, and quick acceleration off the line, but are worse for gas mileage and highway driving. Lower gears also help bring back the acceleration and responsiveness lost when installing oversized tires.

 

Very well put

 

your the man! thanks.

 

what is the stock gear ratio.. for a 97" supercab v8 4.6

 

Look for the Vehicle Certification Label decal inside the drivers side door jamb. Near the bottom, you'll see the word AXLE, with a two or three digit code directly underneath it. Post that code, and we'll tell you what you've got.

 

it says h9

 

You have a 3:55 limited slip rear end.

 

Hey 99fordman, How do you like those 3:73's? I was thinking about replacing my 3:55's with them but withgas at $2.67 that's a hard choice to make!

 

what is the exact size.... 4.10 and 8.8 ?? 10.25 ?? rear end

 

3.55 with LS. 8.8 rearend.