Technical Big truck open drive

Anyine know if a big truck open drive on a 3 or 4 speed uses the same trans mount and yoke as a pickup? Wondering if it'd fit on my 39 trans.

 

I don’t know, maybe @Mac VP will look at the HAMB today.

 

Don't know about the rear mount, but the front bellhousing is the one that people use to mount a later open drive transmission behind a flathead. That is worth saving off the trans.

 

That is a transmission from a half-ton, I believe.

 

Looks like it has a place for a PTO which would make it 3/4 ton or larger if I'm not mistaken.

 

The pickup 42-52 has a slip yoke, as I remember it interchanges with a 55-57 Chevy. So you will need the matching output shaft as well.

 

I'm getting 13-5/8 or so depending on how I hold the tape and the camera from front of hogshead to the center of the mount bolt on the two that I have. Odd thing, the one with the PTO cover came out of a 52 1/2 ton pickup ch***is that I bought and the one with no pto came out of what was supposed to Be a "Truck" It's going in my flathead six powered speedster. the one out of the 52 Ch***is sat out in a field for over 20 years and is froze up but parts are parts.

 

I have a pickup open drive with output shaft but no yoke, thats why I was curious

 

To answer the original question, the answer is no. The rear bearing retainer (which is also the rear support) has a different bolt pattern and the recess for the rear ball bearing, and snap ring is larger on the truck 4 speed transmission. If the intention is to make the 39 transmission into an open drive type, you’d need the 42-50 light duty 3 speed open drive mainshaft and rear retainer……and those pieces would only work if the 39 transmission you currently have is built with the late style synchronizer ge****t.

 

All of the T9 non synchro four speeds had the PTO port. This transmission was optional in half-tons.

 

The larger big trucks had the emergency brake on the back of the transmission. Drive shaft brake. Different animal altogether, I'd think.

 

No, same transmission. The rear mount/output bearing retainer (which is removable, by the way) for the 3/4 tons, 48-early51 had no provision for parking brake drum/hardware (parking brake was in rear drums). The late 51-52 mount did. All of the large trucks had the mount with provisions. Yes, there was one T9, it was adaptable for different Ford applications through the rear mount. The one pictured by the op is a half ton mount.
As an aside, I am using a 3/4 ton mount from a F2-F3 48-early51 with no park brake provision for my MH awd F3. Original was cracked. And MH put park brake drum on transfer case. But enough with the rabbit holes.

 

From number on case, I believe that to be the HD 3 speed, available on both 1/2 and 3/4 tons. They are worth saving/selling, synchronized in 2nd and 3rd, iirc.

 

My 52 half ton had a column shift.

 

That would have been the light duty 3 speed.