F150 Rear Axle Ratio

Look at the door tag. It will have an axle code like 19 or H9 (both of these happen to be 3.55). Once you get it, you can check the codes here.

If you can count the teeth on the ring gear, AND on the pinion gear, divide the total of the ring by the total of the pinion.

It'll probably be either a 3.08 or a 3.55 rear end, with a 3.07 or a 3.54 front.

Spdloader

Spdloader used his keyboard to write :

Thanks, all. Had it towed a few minutes ago. Changing the axle looked easy enough, but it would be my first, and I need it sooner rather than later.

Interesting. The truck looks so much more ample than the Bronco. But, after all, it is only 6-cyl.

Make damn sure its replaced with the correct gear ratio or kiss the transfer case good bye.

Whitelightning

on 5/21/2007, Whitelightning supposed :

So, I've got a question, though. Why did the fluid pour out of it after that loud cracking sound. When I opened it, I couldn't see what would have been holding in all of that fluid in the first place.

On Mon, 21 May 2007 20:53:37 -0400, Dan S. rearranged some electrons to form:

Ummm....you took the rear cover off and are wondering why the fluid came out? What did you expect to happen?

It happens that David M formulated :

No. It came pouring out from the bolted cover after, apparently, the rear end borked. It didn't even leak before the darned thing locked up on me.

Dan S. submitted this idea :

OK. Maybe I'm answering my own question here. But, there wasn't a gasket between the housing and the cover. Maybe something from inside hit the cover knocking it loose. I just don't know how it could have held the fluid before without a gasket of some sort.

There's not a tag on either differential?