What is this rear end from

[SCOTTGTK]

Good am, need your help identifying this rear end. I'll send some pics following this. Currently the 1965 fastback is running disc in the back and we want to take it to the larger 10x 2.5 inch drum set up. TIA, Scott

[SCOTTGTK]

A couple more...

[SCOTTGTK]

Last 2...

[silverton_ford]

It is hard to tell, but the rotor dust shield looks something similar to what was on the Lincoln Versailles.

[SCOTTGTK]

Do the numbers in the casting in pic #2 mean anythhing to you?

[tesgt350]

I worked at an Auto Salvage Yard for 6 Years and would buy every Lincoln Versailles & Mercury Monarch Disc Brake Rear End I could find, post them in the local Ads Paper for $250 and they sell in a couple Days.  They fit perfectly under the 65-70 Mustangs without modifying anything.

[pbf777]

    Yep, though it's been a while since I've seen any, it does appear to be the Lincoln Versailles rear brake stuff.  This rear disc brake system was also available on the Granada and Monarch models as an option (towing package?) the only difference that I recall between the two was that the Versailles came with a pinion flange vs. the others having a pinion yoke.

    The casting numbers on the pinion support in your second photo are "date code" identifiers and the "9G15" would probably translate to: July 15th, 1979, and this is commensurate with the applicable production of 1977-80 for these vehicles. 

    Scott. 

[SCOTTGTK]

Thanks pbf777(scott), silverton_ford and tesgt350... so would this set up accommodate going to 10in rear drum with 2.5 pads???

[Bob Gaines]

Thanks pbf777(scott), silverton_ford and tesgt350... so would this set up accommodate going to 10in rear drum with 2.5 pads???

A 65 or 66 9" rear end housings would have to be procured (two different looks). Original 2 1/2 backing plates and original 2 1/2 drums . That is if you wanted to look original. A more practical alternative for a tribute/clone is aftermarket backing plate and drums for the 65/66 original 9" rear end housing but that will not look completely original. 

[SCOTTGTK]

Thanks bob.... well it certainly doesn't look original now sporting disc's back there and this sounds like alot of $$ and probable headache? Maybe the more practical move is to keep what I already have and go from there. I do have the original Kelsey Hayes up front and rebuilt so there's that!

[pbf777]

A 65 or 66 9" rear end housings would have to be procured (two different looks).

    It's not just the necking down in diameter of the axle tubes towards the ends, as was unique to the '65-'66 H.P.'s, that's different; as the center "banjo" housing is of the later "reinforced" (fatter) design also. 

   

So would this set up accommodate going to 10in rear drum with 2.5 pads???

    I can't remember the details now, but as I recall the answer is 'no', the earlier backing plates don't directly bolt onto these Versailles axle tube ends. 

    But with enough time and effort, nearly anything is possible, I suppose. 

    Scott.

[Poor Ron]

If going back to rear drum brakes, be certain to change back the Master Cylinder also.

[shelbydoug]

It is a Versailles unit and the width of the Versailles is 2 inches less then the drum brake assembly.

The original axles in them are 28 spline.

There is no flange on them to install the drum brakes.

[BryanT]

Nice upgrade to a 65 mustang. Why would you want to change it?

[98SVT - was 06GT]

Stay with the discs. The 2.5 drum stuff is rare/expensive and if you are trying to "create" a Shelby the drums will not sell it.