Diff Identity Query

1945 - 196*, Willys CJ series, questions, discussions, regarding anything related to the post war jeep.®
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Michael C
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Diff Identity Query

Post by Michael C » Fri Aug 06, 2021 3:48 pm

Hello All,

I posted this in the MB/GPW tech knowledge, but am re-posting here in case this turns out to be an early CJ2 axle, and the CJ knowledgeable people recognise it:

I have obtained a rear axle complete, but am having difficulty identifying it. It has full-floating axle shafts, and the following cast markings on the housing:
Web, right side, front(forward) face: 212
Web, left side, front (forward) face: diamond with a 'C' inside, and a '6'
Web, rear, long axle side, upper web: three lines:
top line: 6
middle line: US Pat
Bottom line: 1888618 (or similar - very rough!)

Web, rear, long axle side, lower web: three lines:
Top line: X
Middle line: US Pat
Lower line: several digits, indistinct.

The retaining strap that clamps the crown wheel carrier bearing is stamped '16380', a diamond with a 'C' and '23'.

Does anyone recognise these markings, please? What have I got?

Thanks for the help

Mike


Wolfman
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Re: Diff Identity Query

Post by Wolfman » Sun Aug 08, 2021 6:11 am

Could be CJ, but can't help with the numbers.
First CJ's used left over MB parts. This included the rear axle assembly.
What size brakes does it have ??
The left over axles still used 9" brakes.
When the switch was made to the newer assembly, the brakes went to 11".
Mike Wolford
CJ-2A
VEP GPW
Comm./Inst. SEL
AOPA ( 50 yrs)
EAA ( 49 yrs)
4th Inf. Div. - 5th Inf. Div. - 2nd Armor Div. - CIB

Bruce W
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Re: Diff Identity Query

Post by Bruce W » Sun Aug 08, 2021 8:25 am

The model 23 rear axles with full-floating shafts used in the early CJ’s were not just “left over parts”. They had a 5.38:1 gear ratio, where the MB’s had a 4.88:1 ratio. Checking the ratio is the best way to determine whether the axle is MB or CJ.
All CJ’s up to and including the ‘65 CJ5 still had the 9” brakes, although the drums became outboard mounted in 1953. The ‘66 CJ5 got 10” brakes, not 11’s.
BW
G Trp 2nd Sqdrn 3d Armored Cavalry Ft. Lewis 1970-71. 43GPW(Sarge?) 47CJ2A(Teddy) 47CJ2A(Rusty) 47CJ2A(Zak) 48CJ2A(Lefty) 48CJ2A(Uncle Linden) 53CJ3B(Bulldog) 88XJ(Pluto) NE CO


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