Thread: Differential

I don't know really anything about my differential or gears or how to find out what I have. I want to make the both back wheels spin at the same time. I heard that it is called positraction... What would I have to do to make it positraction?

1995 Ford F-150 302

There should be an axle code on the driver door where the sticker with the VIN and other vehicle is. Find it and google it and that'll tell you what kind of differential and gear ratio you have.

Dodge Sucks, Chevy Swallows, Toyota's the Turd

Got an axle code of 18. Looked it up and it said the ratio is 3.08. But what about the wheel spin? Does that mean only one wheel spins?

1995 Ford F-150 302

Originally Posted by Rob_C95

Okay. So open diff is one tire spinning. Limited slip means that both spin. Understood. What about the gearing. Mine is a 3.08 and you say a 3.31. What's the difference? Is the 3.31 better for speed? Sorry, but I don't really understand the gear ratio? Is larger number better or smaller numbers?

the higher it is, the better it is for acceleration lower is better for gas

Originally Posted by FX4Life

Yup. Open dif...one tire fire! H7 may be an axle worth looking for at a junkyard. 3.31 gears, limited slip...usually axles bolt right in. Just a thot

When you said the axles usually bolt right in. That means I have to get a whole different axle? I couldn't put the gears I want from one into my axle I already have? 1995 Ford F-150 302

Originally Posted by Rob_C95

When you said the axles usually bolt right in. That means I have to get a whole different axle? I couldn't put the gears I want from one into my axle I already have? 1995 Ford F-150 302

if it's 4wd then you have to re gear the front too

It is 2wd

1995 Ford F-150 302

Originally Posted by Rob_C95

It is 2wd 1995 Ford F-150 302

oh, okay