Doug ,
That applied to Equalocks only which as I said were all 28 spline. The clutches were not "torque sensitive" like the later traction locks are. initially they had four steels and three frictions with 2 "Bellville" springs ( conical ) for clutch pressure. later units had 5 steels and four frictions with one Bellville spring. Traction locks have 4-1/2 "friction discs" and steel plates as one steel plate has friction material on one side. The traction lock design uses the "wedge action" of the spider gears to increase the load placed on the clutch pack , hence the name.
Aren't those clutch plates sourced from the C4 automatic transmissions as well?
I bought my first one over the counter in 1972 from my Ford Parts guy.
I had taken in an 9"-3.50 with an Equal lock, a "N" housing and 31 spline axles from, a 69 casting date, from of all people, a Ford Factory rep. I think he's the guy that wanted the 4.44 Detroit locker? I think I made about $150 on the deal?
That Equa lok started some discussion, not necessarily an argument. I remember the issue was it was 3 disc's. Maybe it was 28 splines? Huh?
I was a 23 year old Architect and I'm not supposed to be getting greasy crawling around under these things so it wasn't a matter of what is supposed to exist, it was a matter of what was in front of me.
The Equa-lok got sold off for $50 just by itself. No one really wanted it. The Traction-lok's are nice units. Nice and quiet.
Not like the Detroit lockers. Gee-se. That one almost got me arrested and I was only going 10 miles an hour IF EVEN THAT!