On Sat, 22 Apr 2017 21:54:42 -0400, Ed Pawlowski wrote:

On 4/22/2017 9:39 PM, DerbyDad03 wrote:


I had a 86 Subaru with a Hill Holder Clutch. On a incline of at least (I forget
how many) degrees, you would depress the brake and the clutch. You could then
release the brake and it would stay on until the clutch was high enough to engage the tranny and begin to move the car forward. No more rolling backward
or stalling and a lot less wear on the clutch.

If I recall correctly, they did with a ball inside the master cylinder
that would roll backward and seal something. I forget what made it release
once the vehicle had started moving, since you were often still on a hill.

I recently saw a commercial where some new vehicle had that feature. I'm sure
it's computer controlled now, not mechanical like back in the 80's.


Studebaker had it about 1950. My son had it on his Subaru. Nice feature.
The Stude system was part of the overdrive if I remember correctly. I
was right - just looked up the picture in my 1939 Motors Manual
(Twelfth Edition) Doesn't have any operation description butshows an
"inclinrd surface stationary stud". "ring weight" and "pawl" along
with a "notched ring" fritted on the "splined sleave" on the sun gear
of the overdrive - these parts do not exist on ODs without the hill
holder. On an incline the "stationary stud" slides back, allowing the
pawl to drop into the notched ring. It doesn't show the reverse
lockout but from what I remember reverse shifted the notched wheel off
the sungear spline but I can't swear to that.