9 inch diff backing plate gasket (Inner) 71 Mach1 - metal or gasket paper?

[bdennis]

Hey guys,
I am rebuilding the 9inch diff and centre on my 72 Mach 1.
I am replacing all bearings and gaskets.
I have a question...

What backing plate gasket is the right one / best one for the 9inch on a 72 mustang (H code / FMX / 2.75 diff).
Note it did not have an inner one installed on either axle when I disassembled the diff.

The one that was in the car that I am confident is factory is made of metal.
The same as this one.

1970 - 1973 MUSTANG BACKING PLATE AXLE GASKET (METAL) 8" & 9" AFTER 9/30/1969​

(D0OZ-1001-A)


The alternative is the paper based type.

1964 - 1973 MUSTANG BACKING PLATE AXLE GASKET (INNER) 8" & 9"​

(C5ZZ-1001-I)
They are the same size


Im inclined to install the metal type so it is exactly the same as what was in the car.
Any advice / experience would be appreciated.

 

[Sheriff41]

My 72 had the metal ones. Either should do the job, though.

 

[Cleveland Crush]

+1 on metal. That's what the factory put on.

 

[Barrysmach1]

Hey guys,
I am rebuilding the 9inch diff and centre on my 72 Mach 1.
I am replacing all bearings and gaskets.
I have a question...

What backing plate gasket is the right one / best one for the 9inch on a 72 mustang (H code / FMX / 2.75 diff).
Note it did not have an inner one installed on either axle when I disassembled the diff.

The one that was in the car that I am confident is factory is made of metal.
The same as this one.

1970 - 1973 MUSTANG BACKING PLATE AXLE GASKET (METAL) 8" & 9" AFTER 9/30/1969​

(D0OZ-1001-A)
View attachment 90508

The alternative is the paper based type.

1964 - 1973 MUSTANG BACKING PLATE AXLE GASKET (INNER) 8" & 9"​

(C5ZZ-1001-I)
They are the same size
View attachment 90506

Im inclined to install the metal type so it is exactly the same as what was in the car.
Any advice / experience would be appreciated.also look into lube locker carrier gasket

 

[CandyRcode]

Napa has the correct metal.