MTFCA Forum

I picked up a driveshaft that has the original pinion set up with the sleeve and ballbearings set up just like stock. The other end has machine square end for U joint just like stock. The center section is much larger diameter. I can't see any markings. Was there any variation between years? Was there a run of old replacement that were larger diameter?

Pretty much all driveshafts I've seen have been machined only at both ends and are consequently larger in between. Are you saying the one you have is significantly larger? I can't speak to that.

Compared to all the stock driveshafts that I have it is significantly larger diameter. I'll measure it when I get home.

Probably an aftermarket replacement, not made by Ford. Look the Ford logo stamping. No stamp = not Ford. Some of the aftermarket examples are not well balanced and vibrate badly... or so I've read.

the FORD script is usually found on one side of the u-joint flat. Also, most FORD driveshafts have a Brinell hardness test indentation somewhere on the unmachined portion of the shaft.

What Dan McEachern writes is generally true, however, relatively few Model T parts had the name “Ford” in script on them before March 19, 1919. After that date virtually all genuine parts had Ford script on them somewhere.

Respectfully Submitted,

Trent Boggess

Steve, were you making reference to the drive shaft housing having a larger diameter then tapering down slightly at the front end? I have seen drive shaft housings like that but not sure on the manufacturer. A good friend's 1925 Touring had such driveshaft.

I was referring to the drive shaft not the housing that it rides in. It must be a replacement not original Ford. There is no Ford markings and no dot marks in the center. I believe the dot was a test for hardness ?

The hardness test spot is centered on a flat ground spot.
That flat grind spot is about 1-1.5" long & 3/16"wide with a dimple in the center.
Hard to miss if its there.

Spurious Parts

DanTreace wrote: ↑

Tue Apr 18, 2023 11:52 am

Spurious Parts

... Of dubious quality!