I've got a '65 with 4-speed manual transmission. The cars speedometer has always indicated about 25% slower than actual speed (which really bugs me!). The car originally had an automatic transmission, so I'm reasonably sure that's were the problem originated.
Now, I don't have a clue as how to figure what the proper speedomter gear should be, but I reasoned that with a 2.80 rearend (lowest ratio available), that the gear with the least teeth would be about right. So I ordered a 16 tooth gear for a 4-speed manual. I took it to a shop and the mechanic that tried to install it said it was too short, and it wouldn't work. He believed the gear was simply labeled/packaged incorrectly and it wasn't the correct gear for a 4-speed manual transmission. I double checked the color label, and it certainly appears correct to me.
The mechanic said the gear I gave him was about 1/2" shorter than the gear currently in the car. So now I'm completely lost because I don't have any idea why the gears length should be different, or were to get the proper length gear. Can anybody help?
Thanks,
Kerry
Now, I don't have a clue as how to figure what the proper speedomter gear should be, but I reasoned that with a 2.80 rearend (lowest ratio available), that the gear with the least teeth would be about right. So I ordered a 16 tooth gear for a 4-speed manual. I took it to a shop and the mechanic that tried to install it said it was too short, and it wouldn't work. He believed the gear was simply labeled/packaged incorrectly and it wasn't the correct gear for a 4-speed manual transmission. I double checked the color label, and it certainly appears correct to me.
The mechanic said the gear I gave him was about 1/2" shorter than the gear currently in the car. So now I'm completely lost because I don't have any idea why the gears length should be different, or were to get the proper length gear. Can anybody help?
Thanks,
Kerry