Need help decoding rear numbers
#1
Pro
Thread Starter
Need help decoding rear numbers
Could someone please decode the numbers on this rear please, I just need to know what it says for my own information. I bought it yesterday & would like some info as to what it started life as, thanks for any who can help.
Don
Don
#2
Race Director
This may help. http://corvettec3.ca/axle.htm
Appears rear is from a late C3 car............probably 1981-82 model.
The first two letters are your gear code. The numbers are the date of manufacture, but can't tell if 12-8-81 (1982 model) or 1-28-81 (1981 model).
The letters codes should help you decide. Also count the ring and pinion teeth to confirm ratio.
Larry
EDIT: Another possibility is from a 1978-79 car with the first two stamped letters being OH. The last stamped "1" could then refer to the shift. This seems to be the best interpretation. Perhaps others can help. But if you could the teeth that should nail it down, along with the stampings.
Appears rear is from a late C3 car............probably 1981-82 model.
The first two letters are your gear code. The numbers are the date of manufacture, but can't tell if 12-8-81 (1982 model) or 1-28-81 (1981 model).
The letters codes should help you decide. Also count the ring and pinion teeth to confirm ratio.
Larry
EDIT: Another possibility is from a 1978-79 car with the first two stamped letters being OH. The last stamped "1" could then refer to the shift. This seems to be the best interpretation. Perhaps others can help. But if you could the teeth that should nail it down, along with the stampings.
Last edited by Powershift; 09-12-2017 at 11:14 AM.
The following users liked this post:
VetteZr (09-12-2017)
#3
Pro
Thread Starter
This may help. http://corvettec3.ca/axle.htm
Appears rear is from a late C3 car............probably 1981-82 model.
The first two letters are your gear code. The numbers are the date of manufacture, but can't tell if 12-8-81 (1982 model) or 1-28-81 (1981 model).
The letters codes should help you decide. Also count the ring and pinion teeth to confirm ratio.
Larry
EDIT: Another possibility is from a 1978-79 car with the first two stamped letters being OH. The last stamped "1" could then refer to the shift. This seems to be the best interpretation. Perhaps others can help. But if you could the teeth that should nail it down, along with the stampings.
Appears rear is from a late C3 car............probably 1981-82 model.
The first two letters are your gear code. The numbers are the date of manufacture, but can't tell if 12-8-81 (1982 model) or 1-28-81 (1981 model).
The letters codes should help you decide. Also count the ring and pinion teeth to confirm ratio.
Larry
EDIT: Another possibility is from a 1978-79 car with the first two stamped letters being OH. The last stamped "1" could then refer to the shift. This seems to be the best interpretation. Perhaps others can help. But if you could the teeth that should nail it down, along with the stampings.
#4
Team Owner
Looks to me like OH code, 3.55 used in the 78-80 years at least, but I don't think before 78. Maybe Jan 2, 78?
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VetteZr (09-12-2017)
#5
Pro
Thread Starter
#6
Race Director
Thanks Larry for the reply, this rear is not a 80-82 rear, it is an earlier C2 or C3, I know that the rear ratio is a 3:55 so that isn't the problem, I am just trying to learn what year car it is from & what gears it was born with, also it appears like it may have been stamped over on the 2nd letter.
My EDIT comments on 78-79 are probably correct then.............as OH shows a 3.55 ratio
Larry
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VetteZr (09-12-2017)