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8 3/4 diff markings and ID help..

Posted By: OzHemi

8 3/4 diff markings and ID help.. - 06/14/08 11:06 PM

Just out of curiosity...what do these marking on this diff mean ?


As well...I "think" it's E body It's around 61.5" drum to drum (well, axle flange to flange since there are no drums on it..) and the spring perches are like 46.5" center too center. Oh, and the brakes are 11 x 2.5" .....would that make it an E body one?

Thanks









And this is what it looks like..

Posted By: JDMopar

Re: 8 3/4 diff markings and ID help.. - 06/15/08 04:09 AM

If it's an E-body rear, it's from a 70 model car. The parking brake cables both run to the drivers side on 70's. It's possible that it's a C-body rear. The only difference I have been able to find between the C and E housings is the placement of the brass T for the brake lines. I'll have to look under my Challenger,and then at a C barge rear out back to be sure. Right now it's dark,it's raining, and I'm lazy!
Posted By: DodgeMaterial

Re: 8 3/4 diff markings and ID help.. - 06/15/08 04:53 AM

The yellow "F E" means: F = 1970, E = E-body. I have "F B" on my 1970 Coronet. Fairly common markings. Hope this helps Dave.
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/15/08 04:28 PM

Quote:

Right now it's dark,it's raining, and I'm lazy!



Dang, talk about slack

If it ever stops raining there before the snow starts, thanks for looking for me
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/15/08 04:28 PM

Quote:

The yellow "F E" means: F = 1970, E = E-body. I have "F B" on my 1970 Coronet. Fairly common markings. Hope this helps Dave.



Thanks Be interesting to know what all the other markings are too
Posted By: screamindriver

Re: 8 3/4 diff markings and ID help.. - 06/15/08 11:26 PM

11-10-X on the housing is the rear axle assembly date {11/10/69}... ...And the yellow 079 on the axle tube is a quick assy line reference for the rear...This code should be on the build sheet also...
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/15/08 11:36 PM

Cool, interesting to know what they all mean..thanks!

What about the 8Y3, any ideas?
Posted By: 1_WILD_RT

Re: 8 3/4 diff markings and ID help.. - 06/16/08 03:43 AM

Quote:

11-10-X on the housing is the rear axle assembly date {11/10/69}... ...And the yellow 079 on the axle tube is a quick assy line reference for the rear...This code should be on the build sheet also...



I don't see an 079..Maybe an 078 or an 073...

073 = 1970 E body 3.23 open w/11" drums a 489 case & 7290 yoke

078 = 1970 E body 3.91 Sure Grip w/11" drums a 489 case & 7290 yoke


079 = 1970 E body 3.54 Dana 60
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/16/08 03:47 AM

Looks like 073 to me (I will take a close look at it tomorrow to double check too..)

Quote:

073 = 1970 E body 3.23 open w/11" drums a 489 case & 7290 yoke



Pretty handy to be able to tell that from that code!
Posted By: hemi68charger

Re: 8 3/4 diff markings and ID help.. - 06/16/08 12:46 PM

1_WILD_RT:

Would you happen to know the 3-digit number code for a '68 B-body 3.23 open with drums? Looks like my '68 Hemi Charger R/T has a number of 242 or 042 on the housing, but can't make it out perfectly...
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/16/08 03:51 PM

Quote:



What about the 8Y3, any ideas?



Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/16/08 04:20 PM

The hand draw markings on a rear end could be as different as the individuals who were marking them. One person would scribe them to accommodate their method of identification and another employee (different shift) might do it differently. The exception to this is the date stampings that are done in yellow or white. Those were pretty much universal throughout the run for the rear end setup. Most of the variations you find is with the hand written markings. I personally have seen 6 or 7 different markings that were put on the round part of the painted black housing. Anything from letters to check marks or "X's" etc... It also might have been something that changed during different months of the year. There certainly is nothing better than the original markings to use as a reference!
Posted By: 1_WILD_RT

Re: 8 3/4 diff markings and ID help.. - 06/16/08 04:53 PM

Quote:

1_WILD_RT:

Would you happen to know the 3-digit number code for a '68 B-body 3.23 open with drums? Looks like my '68 Hemi Charger R/T has a number of 242 or 042 on the housing, but can't make it out perfectly...




242 = 1968 B body 3.23 open 11" drums 742 case & 7290 yoke
Posted By: hemi68charger

Re: 8 3/4 diff markings and ID help.. - 06/16/08 06:02 PM

Quote:

Quote:

1_WILD_RT:

Would you happen to know the 3-digit number code for a '68 B-body 3.23 open with drums? Looks like my '68 Hemi Charger R/T has a number of 242 or 042 on the housing, but can't make it out perfectly...




242 = 1968 B body 3.23 open 11" drums 742 case & 7290 yoke



Bingo...
That's what I thought............ NOW, if I can find the stencils for that.. I know Sylvain carries products such as this for hoses and such, but I need to verify rear end housings... Anyone out there have sources for the stencils?
This just verifies to the na-sayers I've come across what I've told him, not all hemi cars had suregrips...

Thanks alot........
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/16/08 06:06 PM

I can take some really high res pics of the markings on mine if it would help at all?
Posted By: burnt_o_matic

Re: 8 3/4 diff markings and ID help.. - 06/16/08 07:03 PM

Quote:

Anyone out there have sources for the stencils?



Those originals are usually pretty sloppy. You could just make yourself a potato stamp.
Posted By: 1_WILD_RT

Re: 8 3/4 diff markings and ID help.. - 06/16/08 08:42 PM

What I did for my car...

Attached picture 4492801-stamps001.jpg
Posted By: 1_WILD_RT

Re: 8 3/4 diff markings and ID help.. - 06/16/08 08:43 PM

2

Attached picture 4492802-stamps.jpg
Posted By: mopar346

Re: 8 3/4 diff markings and ID help.. - 06/17/08 01:20 AM

NIce set up, where did you get it????
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/17/08 01:22 AM

It was made in Canada...can't you tell?


Posted By: mopar346

Re: 8 3/4 diff markings and ID help.. - 06/17/08 01:23 AM

DUH!?!?!?!?
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/17/08 01:30 AM

Posted By: 1_WILD_RT

Re: 8 3/4 diff markings and ID help.. - 06/17/08 03:10 AM

A quick search pulled up this... http://shortorderproducts.com/RibType_Pages/rt-ab_RibType_FONTS/rt_ab_RibType_Fonts.html

FWIW I bought three sets from my local print shop back in the 90's, All three sets together were around fifty bucks... I've used them on six cars & I've loaned them to a few friends...
Posted By: screamindriver

Re: 8 3/4 diff markings and ID help.. - 06/17/08 11:25 PM

Just dropped in and you're right it's a 073... ...No wonder I could'nt find the code when I did a quick search the other day...
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/18/08 12:56 AM

I thought it might have been my camera there for a bit..
Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/18/08 05:53 PM

We will be offering the original type stamps by the end of the summer. They will incorporate the exact font as the ones used by the factory. Here is a sample of what was in my Challenger and the stamps I made that matched exactly what was originally there.


Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/18/08 06:42 PM

Any thoughts on what these codes mean on mine?

Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/18/08 10:14 PM

On the other side of your third member, under the protruding lip, is there another white stamping of some kind? If not, that marking may be some type of date code for your particular unit. Keep in mind that there were a couple of variations and changes for the way the date was stamped throughout the year.
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/18/08 10:30 PM

Here is the other side..and thanks for the info...interesting to know !



Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/19/08 12:01 AM

Your casting is completely different than the one in my car. I have seen the variations but never gave it too much thought. That is the date stamped on the side by the filler hole because that casting did not allow enough room to be stamped on the reinforcing rib underside. Look at my example and you can see the difference. My date of 12/6 is stamped on the underside of the casted rib. I will post 3 different rear end housings (as soon as I take the pictures) to show the contrasting styles that were used. Thanks!
Posted By: hemi68charger

Re: 8 3/4 diff markings and ID help.. - 06/19/08 12:12 AM

Quote:

We will be offering the original type stamps by the end of the summer. They will incorporate the exact font as the ones used by the factory. Here is a sample of what was in my Challenger and the stamps I made that matched exactly what was originally there.





Is the three digit yellow number on both side or one side of the housing tube? I cleaned mine and found one but that doesn't mean the other wasn't there (if there was one on the other side).

Here's mine; '68 Charger R/T, 3.23:1 non-suregrip with 11" drums. "242"

Attached picture 4497362-Picture147.jpg
Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/19/08 01:01 AM

You are correct. I documented a Challenger T/A that had another yellow stamping on the direct opposite adjacent side of the front date stamping. I would like to find someone who worked at the facility and was part of this stamping procedure. They could help take the guess work out of what we are trying to uncover.
Posted By: Anonymous

Re: 8 3/4 diff markings and ID help.. - 06/19/08 02:55 AM

On OZHEMI`s photo would`nt the date code be the 2189 under the part number?
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/19/08 02:58 AM

Would that go along with this code?

Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/19/08 03:17 AM

Quote:

On OZHEMI`s photo would`nt the date code be the 2189 under the part number?



That is the casting date of the housing unit. The actual assembly date (Gears, pinion, etc...) of the rear end would be what was designated by the white stamping.
Posted By: autoxcuda

Re: 8 3/4 diff markings and ID help.. - 06/19/08 04:29 AM

Another good thread on this subject from the past:

https://board.moparts.org/ubbthreads/show...part=1&vc=1
Posted By: 70runner

Re: 8 3/4 diff markings and ID help.. - 06/19/08 09:51 PM

Can you guys indicate a font which is a good approximation of the 3 digit part number on the axle tube?
Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/20/08 02:05 AM

Quote:

Can you guys indicate a font which is a good approximation of the 3 digit part number on the axle tube?




I found a couple that were close but not an exact match. I had to take the fonts into an "illustrator" program and convert them into "characters" in order to manipulate and change their appearance. That allowed me to match the exact font and replace what I found on my axle setup.
Posted By: Anonymous

Re: 8 3/4 diff markings and ID help.. - 06/20/08 02:38 AM

11-10 I understand the X I`m not sure the date on the gears is what?

When are you thinking you may have your stamps ready for resale?
Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/20/08 05:55 AM

The stampings were done to make "sense" for whatever plant or employees needed to understand the rear end breakdown. I am not sure what all of the variations and colors of markings meant. Having the original samples certainly makes it easier to eliminate the guess work when trying to replace them.
I can have stamps made up at anytime. I do not have a set program or pricing as of yet. We just finished the different fonts, so this project is still in the beginning stages.
Posted By: DoctorDiff

Re: 8 3/4 diff markings and ID help.. - 06/20/08 02:17 PM

I've never seen a 489 case with a sure-grip tag. As far as I know, the one pictured is for a Dana 60.
Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/20/08 04:17 PM

Quote:

I've never seen a 489 case with a sure-grip tag. As far as I know, the one pictured is for a Dana 60.



Thanks for the heads up on this piece of information. I will definitely look into this area of detail. I have is a posi rear in this car. Do you (or any one else involved with this thread) know why they would put the metal tag on the Dana style rear end with posi but not the 8 & 3/4 with posi? I thought the tag was used to let the person filling the rear (with oil) know that the posi oil additive was required.
Posted By: DoctorDiff

Re: 8 3/4 diff markings and ID help.. - 06/20/08 05:26 PM

Prior to 1969 most Spicer Power-lock equipped passenger car 8 3/4" rears used a round, aluminum sure-grip tag.

Starting in 1969, with the introduction of the Borg Warner Spin resistant differential, the limited slip lube requirement was supposed to be designated with a dalb of paint. Unfortunatley, I can't remember the placement or color.
Posted By: sixpaktoogo

Re: 8 3/4 diff markings and ID help.. - 06/21/08 03:41 AM

Quote:

Prior to 1969 most Spicer Power-lock equipped passenger car 8 3/4" rears used a round, aluminum sure-grip tag.

Starting in 1969, with the introduction of the Borg Warner Spin resistant differential, the limited slip lube requirement was supposed to be designated with a dalb of paint. Unfortunatley, I can't remember the placement or color.



I have just removed my 8 3/4 from my Los Angeles built 70 340 Cuda, and have started cleaning it. It only has a 3.91 tag on it. No sure grip tag, even though it definitely has a sure grip (Track Pak car). Rear appears to have never been apart. There is an orange paint daub on the filler nut, and a large amount of pink paint on the top of the pumpkin. Could the pink be the code for a sure grip?????
Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/21/08 06:40 AM

Quote:

Prior to 1969 most Spicer Power-lock equipped passenger car 8 3/4" rears used a round, aluminum sure-grip tag.

Starting in 1969, with the introduction of the Borg Warner Spin resistant differential, the limited slip lube requirement was supposed to be designated with a dalb of paint. Unfortunatley, I can't remember the placement or color.




I cannot thank you enough for passing along this information. The rear end colors and logistics still are a mystery for now. We have already "fixed" the error and left the colors just as we found them. I originally thought that the tag might have been removed sometime in the past 38 years. I am beginning to believe that the blue marking I found on the casting might be the color that designated the limited slip setup.
Posted By: Anonymous

Re: 8 3/4 diff markings and ID help.. - 06/21/08 03:27 PM

Any way to post some pics? Would really like to see a pic of the L.A. built 70 cuda rearend after the cleaning is done.

What has been the average time from the time the cast date of the chunk to the rear assembly date?
Posted By: OzHemi

Re: 8 3/4 diff markings and ID help.. - 06/21/08 03:31 PM

Mine is a '70 and the markings on it are pretty clear at least (and original) but not sure what plant it was from?
Posted By: beepbeep

Re: 8 3/4 diff markings and ID help.. - 06/22/08 06:04 AM

Monkey wrench time.

Attached picture 4503902-Axle2.JPG
Posted By: Anonymous

Re: 8 3/4 diff markings and ID help.. - 06/22/08 06:17 AM

LOL, ok where did this come from?
Posted By: beepbeep

Re: 8 3/4 diff markings and ID help.. - 06/22/08 07:24 AM

'70 T/A 3.91's.
Posted By: Troy

Re: 8 3/4 diff markings and ID help.. - 06/23/08 03:39 PM

Quote:

'70 T/A 3.91's.



Really?? Never seen that before.

Attached picture 4506396-TADisc2079.jpg
Posted By: Troy

Re: 8 3/4 diff markings and ID help.. - 06/23/08 03:40 PM

....

Attached picture 4506398-TADisc2158.jpg
Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/23/08 04:03 PM

Quote:

....



Excellent Mr. T. It looks fantastic!

DW
Posted By: Tommy The Chryco

Re: 8 3/4 diff markings and ID help.. - 06/24/08 11:48 AM

does a 1968 A-body rear have any markings??
Posted By: ECS

Re: 8 3/4 diff markings and ID help.. - 06/24/08 11:00 PM

Quote:

does a 1968 A-body rear have any markings??



I am sorry but I have not researched that year or model of vehicle. Hopefully someone on this thread can answer your question. Good Luck!
Posted By: sam c

Re: 8 3/4 diff markings and ID help.. - 06/24/08 11:55 PM

these are from my 1970 Challenger

Attached picture 4509539-pict5.JPG
Posted By: sam c

Re: 8 3/4 diff markings and ID help.. - 06/25/08 12:00 AM

I'll try again

Attached picture 4509555-pict7.JPG
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