is this 9 inch a posi?

[shortrack]

not much of a Ford guy I admit.....the guy I bought it off sold it to me as an open diff but Im not so sure can anyone tell.....the numbers on it are.

IA30

C 6AWD MCC.....(all the the C's could be 0's)

42

[jpdeuce]

Open diff..

[68Formula]

Can't be a posi, since positraction is a Chevy term and this is a Ford.

[chicane67]

It looks like a "two pinion" open...

[big gear head]

The Ford Traction Lock (posi) uses ring gear bolts with a 5/8 head on them. The bolts that are in yours have 3/4 inch heads. Most of the TLs had 4 pinion gears. The cover on the left will be bulged out to make room for the clutches, which is why they use the smaller 5/8 head on the bolts. Many of the 4X4 F150 trucks had the TL in them. Some have 28 splines and some have 31.
https://static1.pt-content.com/images/noimg.gif (http://rides.webshots.com/photo/2338093510041712107FQtYGj)
Here is a picture of the TL, showing it's most comon weakness. The side cover is weak and usually breaks when abused too much.