Please Clarify
Thread Starter
Pro
Joined: Mar 2006
Posts: 623
Likes: 2
From: Sugar Land Texas
Please Clarify
Hello members 
As you may have read my previous post I had a problem with my Gas tank leaking Well thanks to Speed 55 I now have a brand new Gas tank, I was detailing the undercarriage Being as the tank was out and I noticed that my differential cover numbers were upside down they read 3030383MG (GM 3830303) ON TOP BOTTOM WAS 3MG is the cover on backwards? Can anyone tell me the gear ratio? Also on the driver side of the pumkin ther are some numbers but not legible because of the left side rear strud housing can't see behind it
Any Help (John Z) would help
Happy Thanksgiving to everyone
BuffaloBILL
65Vert
As you may have read my previous post I had a problem with my Gas tank leaking Well thanks to Speed 55 I now have a brand new Gas tank, I was detailing the undercarriage Being as the tank was out and I noticed that my differential cover numbers were upside down they read 3030383MG (GM 3830303) ON TOP BOTTOM WAS 3MG is the cover on backwards? Can anyone tell me the gear ratio? Also on the driver side of the pumkin ther are some numbers but not legible because of the left side rear strud housing can't see behind it
Any Help (John Z) would help
Happy Thanksgiving to everyone
BuffaloBILL
65Vert
Team Owner
Joined: Feb 2003
Posts: 54,073
Likes: 9,398
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
if you are are under the car looking at the pumpkin there should be a machined pad with a stamp. post thoes numbers. I think you got the pumpkin casting numbers
Thread Starter
Pro
Joined: Mar 2006
Posts: 623
Likes: 2
From: Sugar Land Texas
Differential
Sorry
I am facing towards the front of the 1965 Corvette Conv. and these may be casting numbers however the Diff cover stamps are upside down Is this correct or sis the previous owner have the cover installed improperly??
Happy Thanksgiving
BuffaloBILL
1965 Factory A/C Vert
I am facing towards the front of the 1965 Corvette Conv. and these may be casting numbers however the Diff cover stamps are upside down Is this correct or sis the previous owner have the cover installed improperly??
Happy Thanksgiving
BuffaloBILL
1965 Factory A/C Vert
Le Mans Master
Joined: Feb 2006
Posts: 6,048
Likes: 5
From: "cutesy" TN
Sorry
I am facing towards the front of the 1965 Corvette Conv. and these may be casting numbers however the Diff cover stamps are upside down Is this correct or sis the previous owner have the cover installed improperly??
Happy Thanksgiving
BuffaloBILL
1965 Factory A/C Vert
I am facing towards the front of the 1965 Corvette Conv. and these may be casting numbers however the Diff cover stamps are upside down Is this correct or sis the previous owner have the cover installed improperly??
Happy Thanksgiving
BuffaloBILL
1965 Factory A/C Vert
The numbers for what ratio are on the bottom (where you would put the floor jack).
Thread Starter
Pro
Joined: Mar 2006
Posts: 623
Likes: 2
From: Sugar Land Texas
Differential cover
Hello
I NEVER stated that the cover was backwards I my post stated if it is possible for the cover to be UPSIDE DOWN Has anyone had this issue on their Vettes
Thank you
Bill
I NEVER stated that the cover was backwards I my post stated if it is possible for the cover to be UPSIDE DOWN Has anyone had this issue on their Vettes
Thank you
Bill
Melting Slicks
Joined: Sep 2001
Posts: 3,019
Likes: 1,098
From: Aggieland TX
Bill
The ratio code should be stamped into the bottom edge of the unit along with the date. Here's a shot from the 68 rear that was in my 65. Ratio code is in the box. A0 = 3.70 posi.
Here's a link to some info about codes for 1966 vettes:
http://www.corvettefever.com/images/...ion_codes.html
Hope this helps.
DZ
The ratio code should be stamped into the bottom edge of the unit along with the date. Here's a shot from the 68 rear that was in my 65. Ratio code is in the box. A0 = 3.70 posi.
Here's a link to some info about codes for 1966 vettes:
http://www.corvettefever.com/images/...ion_codes.html
Hope this helps.
DZ
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
The numbers on the driver's side are the casting date for the diff housing. Look at the bottom flange of the diff housing, between the spring plate and the camber strut bracket for the stampings that show the ratio code and assembly date - you'll need to clean it first.
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