Transmission Numbers
Thread Starter
Advanced
Joined: Oct 2023
Posts: 71
Likes: 1
Transmission Numbers
I have a 71 corvette, not sure what's in the car. A 350 engine and an automatic transmission. Trying to get more info on the transmission. I currently have it pulled out of the car. I found a plate on it, the plate has a 463 stamped on it in addition too, 71-CK and 6870. Another place on the transmission had "Nepal Motors Corp" and 8623462 Does any of this make sense to anyone?
Let me know, thanks!
Let me know, thanks!
Last edited by jm1gic; Jan 1, 2025 at 07:51 PM.
Racer
Joined: Jul 2018
Posts: 331
Likes: 123
From: Sandusky, OH
Pictures would be nice. A tag on the passenger side is generally a 400 Turbo. The stamped 71; maybe yes an original 1971 trans. Do some of these numbers match the last numbers of the VIN?
Research all things C-3 at: corvettec3.ca
Research, research….All sorts of TH 400 information on the net.
Steve O.
Research all things C-3 at: corvettec3.ca
Research, research….All sorts of TH 400 information on the net.
Steve O.
Thread Starter
Advanced
Joined: Oct 2023
Posts: 71
Likes: 1
Pictures would be nice. A tag on the passenger side is generally a 400 Turbo. The stamped 71; maybe yes an original 1971 trans. Do some of these numbers match the last numbers of the VIN?
Research all things C-3 at: corvettec3.ca
Research, research….All sorts of TH 400 information on the net.
Steve O.
Research all things C-3 at: corvettec3.ca
Research, research….All sorts of TH 400 information on the net.
Steve O.
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,135
Likes: 4,245
From: US-PNW
I have a 71 corvette, not sure what's in the car. A 350 engine and an automatic transmission. Trying to get more info on the transmission. I currently have it pulled out of the car. I found a plate on it, the plate has a 463 stamped on it in addition too, 71-CK and 6870. Another place on the transmission had "Nepal Motors Corp" and 8623462 Does any of this make sense to anyone?
Unfortunately the hot tanking that occurs with a rebuild often removes the painted portion of the tag.
Your tag originally had a colored background and other wording/logos like this:
I believe all Corvettes up to the mid-70s had TurboHydromatic 400 transmissions.
71 is the model year;
C indicates Chevrolet;
K/S/Y indicates what engine it was paired with: K being the 350 in Camaro and Corvette.
463 is a Julian date from Jan. 1, 1970 > April 9, 1971 (how does this match your VIN birthday?)
6870 is the transmission's serial number. There should also be a partial VIN of the car it was originally installed in on the driver's side, by the transmission shift boot.
Last edited by barkingrats; Jan 1, 2025 at 09:19 PM.
