identifying rear end

F-100Ranger · Post by **F-100Ranger** » Sat Jan 15, 2005 4:29 pm

I got the rear end off, but there's no tag and I can't see any number stamped on the right side. Can anyone tell me exactly where to look for any identification? I don't trust the id plate on the body since there seems to be so many changes on this truck.

magnethead · Post by **magnethead** » Sat Jan 15, 2005 5:13 pm

well to my knowledge, it's either a 8.8 or 9".... I'm willing to guess 8.8

Post by **DuckRyder** » Sat Jan 15, 2005 6:01 pm

magnethead wrote:well to my knowledge, it's either a 8.8 or 9".... I'm willing to guess 8.8

If it is a 1967-72 it is not an 8.8 unless someone put an awful lot of effort into it.

In an F-100 it is almost certainly a 9", but it could be a Dana too.

Either one should have a metal tag bolted under one of the third member (chunk) nuts. (Or rear cover bolts if a Dana) If the tag is gone

count teeth...

Post by **FORDification** » Sat Jan 15, 2005 9:05 pm

Yeah, it definitely will not be anything other than a Dana 60 or a Ford 9". Take a look to see whether it's got a removeable rear cover (Dana) or a drop-out pumpkin (from the front):

magnethead · Post by **magnethead** » Sat Jan 15, 2005 10:31 pm

isn't dana axle corperation part of Diamler-Chrysler?

Now i know of dana's being in chevy, GMC, ford, and dodge trucks. Haven't climbed under a toyota or nissan yet, they prolly got dana's too.

Post by **FORDification** » Sat Jan 15, 2005 10:41 pm

Dana 60's were the differential of choice back in the musclecar era in the Mopar camps...if you had musclecar with a big engine, you got a Dana. But AFAIK that's their only connection.

F-100Ranger · Post by **F-100Ranger** » Sun Jan 16, 2005 12:55 pm

A lot of good history here. But all the good info here and in past posts still doesn't help me fully identify the rear end. According to Keith's above post it's a 9". So now for the ratio...

I rotated a brake drum to see how many times the universal would turn. Lookin at it like a clock the universal turned around once and then again to the 8 o'clock position. Doesn't seem enough. How do I read that anyone?

Post by **DuckRyder** » Sun Jan 16, 2005 1:56 pm

Some thing did not work out.

You have to hold the free axle if it is an open diff.

As you may know, LSD should lock the axels together and they will rotate in the same direction, an open will rotate opposite directions.

The most accurate way to ID, it is to pull the axles, pull the chunk, and count the teeth on the ring and pinion.

F-100Ranger · Post by **F-100Ranger** » Sun Jan 16, 2005 5:44 pm

Well, I kept the left wheel side from rotating, but I still get the same revs on the universal. Now I know why my gas milage was so good. No matter what, I've dropped the axle off the frame and am pulling the brake lines and wiring off too.

Now if I can just flip the frame without killing myself I'm going to scrape the grease and grime off the frame, hit the car wash and onto the blaster.

I guess I should go to the body and paint forum to ask a question about painting the frame.

Got to get a digital camera so I can start posting some pictures.

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