I understand there is a code in the door jamb decal that describes the rear housing in an F-150. My problem is I have 2 rear housing assemblies here from salvaged trucks and the trucks are gone. One was a '16 and the other an '18. I find a code on tape wrapped around the rear tube of each housing. What do those codes tell me?
I have S808A and SB78A.

 

Are there any tags on the diff rear cover bolts? That is where the info is supposed to be.

 

Not that I know a lot about this but I haven't noticed that metal tag for a few years now. I thought they went to the tape around the tube?

 

https://www.unitedtruckdism.com/used...MBLY_RR/45655/

Looks like S808A is a 3.55 open 8.8 out of a 3.3 liter with electric e-brake. No info on the SB78A, look at it again.

 

thanks

 

Not close enough to recheck that latter code but I'm guessing it should read S878A.

 

Looks like you also had this issue 3 years ago -

https://www.f150online.com/forums/20...axle-code.html

Looks like the S878A is a 3.73 open 8.8 out of a 3.5 NA.

https://subwaytruckparts.com/cars/us...50-xl-3-5l-4x2

The S808A is probably out of the 2018, the S878A is out of the 2016.

 

You are correct and you have a better memory than I do! THANKS
So neither of these rears have a metal tag attached. Did Ford quit using the metal tag and go to the tape in recent years?

 

I believe so. Now - I don't know if they are standard 8.8 or Super 8.8. Standard has 10 bolt cover, Super is 12 bolt.

 

Thanks!