cb.bums

how can I find out how many '75 convertibles with air and 4 spd were built?

Nowhere Man

throw in random numbers in a hat and pick one. GM NEVER kept records that detailed all we know is how many of EACH option

there was 4,639 convertibles
AC was 31,914
4-speed was 1,057

if you can do some math equation to make your self happy do it. but know one can tell you that your right or wrong

409/409

I have one. I read somewhere probably about 118 L-82 4 speeds. That's probably an educated guess.

Easy Mike

You can't. GM did not keep data on options or color combinations. You can rest assured you have one of the last convertibles until the 1986 model year

bashcraft

What we do know for sure is that it somewhere between 1 and 1,057.

Easy Mike

Pssst!! The M20 wide ratio 4 speed was standard; M21 and AT were optional. Should be about 8935 M20 75s out there.

pmr2000

Right according to stats out there only 26% of all 75's were manuals including close-ratio.

I would say in general vert's have a higher percentage of automatics but I think old Corvettes may be the exception.

So maybe 26% of the 4629 vert's were manuals?

Tiger Joe

math says a good estimate would be around 1,000.


we know for certain your car is a convertible- they built 4,629 of those


now we don't know exact numbers of cars with multiple options, but we know total of each options:


approx. 26% of cars were 4 speeds, and 83% of cars had A/C


so if we assume this percentage was spread evenly between coupes and verts then i come out 998

dochorsepower

I've got one too. You can check the Corvette registry just for giggles. Another random act of helpfulness is that 4-speeds were not sold in California because GM didn't want to bother with emissions certifications.

Easy Mike

You can play with options numbers and percentages for hours, but you arrive at only guesses, maybes, and assumptions. The honest answer is that without data from GM, we'll never know exact combination numbers.

Tiger Joe

while I agree no one will ever know an exact number, using statistics is far from guessing.

7T1vette

You can't. The data don't exist. The best you can do is estimate it. But, I would offer that those who bought 4-speeds were looking for "power" and that A/C was added weight and power loss. I suspect that a higher proportion of automatic cars had A/C than 4-speed cars.