I bought a differential and cool magnesium side plates with splined IRS axle stubs and aluminum disc brake mounts in Indy a few years back that were purported to be for a Halibrand V8 quickchange - there were no manufacturer marks anywhere but it looked legit - I didn't need it nor did I really have a plan to use it but thought it was cool. The diff is missing some internal parts but I thought maybe I could figure out what it needs. Started looking closely at it this week and it turns out that it actually does not fit a V8, nor would it fit an H101 midget qc either. The outer bolt circle is 8 15/16" with tiny 5/16" holes, slightly smaller than the Halibrand stuff and off enough that it doesn't fit. The differential also does not fit the V8 ring gear although it has an equally-spaced 8 bolt pattern like a V8 (the H101 midget ring gear has a Ford Model A-style offset 9 bolt pattern), the pattern is just smaller in diameter at 5 9/16". I have no idea what this is for - at first glance it sure looks correct for a qc but nothing fits. It is definitely vintage and the sideplates are magnesium - not sure if other qc manufacturers built a small qc that was slightly different than the Halibrand... If anyone has seen something like this please let me know.
This one is easy And this is the clue! That looks like a "Weismann Locker" which was very successful in early Road racing. The Weismann Locker was technically an "Unlocker" that would release torque on the inside wheel through corners preventing understeer
Chris got back to me from Weismann - unfortunately this is not a Weismann locker, he said it looks like a cam and pawl, so back to the hunt...
Maybe... From Dec '66 HotRod mag, pgs 100 & 101: Hy-Torq differential, made in Portland Oregon. The article states Hy-Torq will have 80 different units available by first part of 1967. Magfiend, your pieces don't look quite correct, compared to the pics/drawings in the article, but maybe that diff is for racing. The street unit had 8 rollers in it, worked on the free-wheeling/sprag/roller concept. Very similar to Weisman diff. Marcus...
Thanks, I'll check it out...looks like that one used rollers as opposed to the pawls (called plungers or chicklets) in a plunger carrier.
It is a cam and pawl [sorry I mislead you] This is the drive flange [these usually have 8 x pawls in them] The inner is usually the L/H axle and the outer is the R/H axle When assembled the drive flange with the pawls goes between the inner and outer. A Cam and pawl is brutal like a Detroit locker, stand on the gas mid corner and you get understeer. AND they can lock under extreme downshifting as well Here is a cutaway of a Hewland Cam and Pawl [inner L and outer R in red, drive flange in blue] They were also made by Jack Knight, and Staffs
It’s not going to be a Jack Knight one, they will have only 6 crown wheel bolts as he did MG Midget and Mini stuff.
If I could ID the make maybe I could narrow down what kind of car it ran in and find a market for it. I thought for sure the smooth mag IRS side plates would be a giveaway...
The Jalopy Journal
