Name that differential

Im picking up 700lbs of older 3rd members from a guy and cant ID half of them. figured you guys run the spectrum of badge fans so..some have no casting numbers at all on them so Ill post pics tomorrow night. Looking forward to some answers, or guesses?

 

Uh 12 bolt??

Should we go ahead and guess now?

 

uh..56 Ford, 48 2½T GMC, 59 Buick wagon, 54 Willys M38, 66 Merc full-sized, 62 Dodge, 1917 Herkimer HyDrive, 1944 Mack 2spd....how am I doing?

 

Oh oh ...that's a 6-ton Timkin out of a 1942 Brockway wrecker......pretty rare.

 

Thanks for the warning, although it's really not necessary. Make sure the pictures are clear, in focus, and show the whole thing from a couple different angles. Also be sure to offer a prize, cash works well.

 

Well, I know you got one right, maybe 2. Well see tonight. 62 Dodge 652 casting (superceded by more popular 741 casting)

 

OK, got 6 and I know 3 so here are the other 3: only casting shown is on the twins.

 

neat stuff, not what you'd find in one of the Big 3 cars that I'm familiar with.

Have a look here....

http://www.marxparts.com/transmission.htm

there are several diff gaskets shown, you might find that the Hudson and Packard look similar.

 

My old mechanic said the look like old Power Wagon or truck diffs. He said the truck diffs look "funky". The weird one is a 4.11 ratio. Got some info on the twins, sure are Chryco as they have the DPCD square logo on the gear set and maybe some dates? one says 3.36:1 #870307 8 18 41 277NU and the other says "FORMATE" 3.36:1 1122353 12 23 48 234AJ so, maybe '41 and '48 Dodge diffs. Other one is still mystery, but I did get a number off it 403121 and there was a yellow paint pen that said 41 40. Ill look those years up. Thanks for the responses.

 

Interesting about the mopar ones...3.36 ratio in the 40s would probably be from a big car, like a Chrysler. DeSoto only went as low as 3.54 as an optional ratio, plymouth standard ratio was 3.90

 

It is what it is...Saw an Ebay listing for a 37-48 truck axle and it looked very similiar 'cept for the round flange on the listing and my U joint flanges. FORMATE is the cut of the gear, silent type. Check it out:

http://cgi.ebay.com/ebaymotors/1937-1948-PLYMOUTH-DODGE-TRUCK-REAR-AXLE-1941-/280597379901

 

Ok, maybe I should have leaked this photo...

Found it when I finally got the gear set unfroze. A little oil soaking helps break 40 years of shelf life. Thanks guys!

 

So that's why the 9 bolt packard gasket looked so similar....

 

Packard 4.1:1