Rear end tag decode

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Joined
Jan 30, 2011
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Location
Alabama
My Car
1973 H code Mach 1
this came off the rear end i plan on putting in my 73 but i want to fresh it up before i do . WES-T 3EB 2.75 9 951C any help in decoding would be appreciated

 
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We need to find what 'WES-T' means. 3EB is the date code (year,month,week), 2.75 is your ratio, 9 is a nine inch (good!) and 951C is the plant code.

************************

Got it. WES-T1 is a conventional removable carrier axle, I think that

makes it easier to change gears. Also is a 2-pinion setup whatever

that means. Info came from my Ford shop manual volume one pages

15-10-03/15-10-20.

mike

HPIM3096.JPG

HPIM3095.JPG

 
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Thanks for the quick response Guys very helpful !! thanks Rick for that site i will save that one as well the one i was looking at showed the WES-T as 69-70 only and i knew this came from a 73



We need to find what 'WES-T' means. 3EB is the date code (year,month,week), 2.75 is your ratio, 9 is a nine inch (good!) and 951C is the plant code.

************************

Got it. WES-T1 is a conventional removable carrier axle, I think that

makes it easier to change gears. Also is a 2-pinion setup whatever

that means. Info came from my Ford shop manual volume one pages

15-10-03/15-10-20.

mike

Thanks Mike now to find out what the hell a 2- pinion set up is

 
Last edited by a moderator:
Got it. WES-T1 is a conventional removable carrier axle, I think that

makes it easier to change gears. Also is a 2-pinion setup whatever

that means. Info came from my Ford shop manual volume one pages

15-10-03/15-10-20. Okay now i feel a little dumb lollerz
ford9traclockblowup_large.jpg
In the center of this photo is a square block with 4 small gears around it. Those are the pinion gears 2 pinion diffs have the two gears on the long shaft only. The 4 pinion unit adds the 2 extra gears on the short shafts.

 
Check here

http://www.kevinstang.com/Ninecase.htm

the 2 pin should be a open carrier (not posi) the 4 pin would be posi.
Thats what i was thinking as well until i saw that in the chart NL2 - non locking 2 pinion, NL4 - non locking 4 pinion, L - locker from what i gathered the 4 pinion is a heavy duty rear end

 
There were non locking 4 pinion 9 inch diffs. I had that set up from the factory in a N case in a 70 Boss 302. It struck me as absurd but, there it was. Chuck

 
Can someone please decipher this for me ? HBA CG 12 W 15 70      Thanks.

 
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