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M
I have a question about my 1977 Corvette. I know that there were roughly 1900 bright yellow vettes produced and about 2000 manual transmissions that year but how can I find out how many bright yellow four speeds were produce? I'm new to this research thing so any assistance will be appriciated.
Very Respectfully,
Mark Ehresman
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Free Member
Send PMFrederick, MD - USA
Joined: 9/8/2003
Posts: 3398
Vette(s): 1969 convertible L71 427/435 4-speed black interior
There were 49,213 Corvettes made in the '77 model year.
There were 41,231 equipped with automatic transmission, leaving 7982 made with M20 wide ratio or M21 close ratio manual transmissions, or approximately 17% were manual equipped cars.
There were 1942 Bright Yellow Corvettes in '77, or about 4% of production.
Extrapolating that would mean roughly 78 Bright Yellow cars would be equipped with manual transmissions. That's the SWAG method (Scientific Wild-Assed Guess).
To go a bit further, of the manual transmission cars built, out of the 7982, 2060 were M21 close-ratio and the balance (5922) were M20 wide-ratio units. So about 26% were M21 and 74% were M20 of the manual equipped cars.
Extrapolating further, that would mean of the roughly 78 Bright Yellow cars with manual transmissions, about 20 were M21 and 58 were M20 cars.
There are no known records that give you the exact number. All you can do is take the known numbers and work the percentages and that should have you in the ball park, but it's no certainty of any real accuracy.
My numbers came from the Corvette Black Book and I worked the numbers from them.
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M
Thanks for the quick reply and I must say I must have got lucky in getting this vette with such low production numbers and all this on a 66XXX mile car. It is alot of fun for me and my 11 year old to play with.
VR,
Mark
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Lifetime Member
Send PMHOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
I think the SWAG method may have even worked better for calculating our national debt Bruce!!
Cool extrapolations!! 
Paul
LukesVette Homepage
Veteran of Operation Iraqi Freedom
101st Airborne(AirAssault!)
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Former Member
Send PMManteca, CA - USA
Joined: 11/20/2005
Posts: 3623
Vette(s): 1978,two tone,Metalic Rootbeer & gold
1975 L48 4 speed
Pretty cool Bruce. Way to go dude 
.
.Jimmy B.
Just can't wait to get on the road again. 
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in Forum: C3 General Discussion
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