My Differential code is wired?
Thread Starter
Racer
Joined: Sep 2004
Posts: 497
Likes: 0
My Differential code is wired?
I have on my Differential this code
OA 2 03 W7E1
The first two are defeinitely OA
and I checked these numebers like 10 times LOL
I can't even tell what gear or anything.
Anyone know how to decipher this?
Thanks eveyone.
OA 2 03 W7E1
The first two are defeinitely OA
and I checked these numebers like 10 times LOL
I can't even tell what gear or anything.
Anyone know how to decipher this?
Thanks eveyone.
Thread Starter
Racer
Joined: Sep 2004
Posts: 497
Likes: 0
I'm horrified but relieved to find out this... I'm getting this code from a 69 BB car... (Apparently a BB car) LOL
So any other way to confirm that this is indeed a 76-77 rear end and not a 1969 rear end? LOL
I checked codes for the 1969 model year and the only thing close I was thinking that was listed was AO which is a 3.70 gear but it reads OA !!! So I was thinking maybe the GM factory made a mistake when inputting the code and by mistake stamped OA instead of AO... LOL
Any possibility... NOT LOL
I am flabergasted and shocked... Tell me more guys... You guys are my Freaking Saviors!!!
So any other way to confirm that this is indeed a 76-77 rear end and not a 1969 rear end? LOL
I checked codes for the 1969 model year and the only thing close I was thinking that was listed was AO which is a 3.70 gear but it reads OA !!! So I was thinking maybe the GM factory made a mistake when inputting the code and by mistake stamped OA instead of AO... LOL
Any possibility... NOT LOL
I am flabergasted and shocked... Tell me more guys... You guys are my Freaking Saviors!!!
Melting Slicks
Joined: Mar 2002
Posts: 2,140
Likes: 7
From: Ohio
It could be stamped backwards real easy at the factory. I am not sure that 7 is the year as the numbers and letters don't read right. Many rear ends have been exchanged at corvette shows and by rebuilders.
Instructor
Joined: Mar 2005
Posts: 135
Likes: 0
From: Northern NJ
You could pull the cover and count the teeth-
2.73 - 41 and 15
3.08 - 37 and 12
3.36 - 37 and 11
3.55 - 32 and 9
3.70 - 37 and 10
4.11 - 37 and 9
You will at least now for sure what your ratio is.
2.73 - 41 and 15
3.08 - 37 and 12
3.36 - 37 and 11
3.55 - 32 and 9
3.70 - 37 and 10
4.11 - 37 and 9
You will at least now for sure what your ratio is.
Tech Contributor
Joined: Aug 1999
Posts: 15,130
Likes: 3,938
From: Connecticut, USA
If you go to that post I have going in tech I just did a 69 BB diff. The date code is cast into the housing on the drivers side. The internal posi case and spider gears are different between 69 and 76. It may/may not have the older little sq window vs the larger tear drop rear opening. The spinder would be 10-18's vs the better 10-17's. That's lot of work for a date code though. If it runs ok and you like the gear leave it alone otherwise you're going to be doing more work then you need to.
Gary
Gary
