What Gears Do I Have?

[jedpony]

Ive got a 95 gt vert. I havent had time to see what gears are in the car. The car is about 10 mph off on the speedo. Its all stock minus a few bolt ons and exhaust. Any idea? 3:55 maybe?

 

[Hoseitdown]

Hard tellin not knowin...

 

[Slykin]

10mph is irrelevant, it's all percentage based so that the faster you go, the larger the magnitude of the difference. It also depends on what gears you previously had since that determines what speedometer gear is in your transmission. The easiest way to do it is to lift the car up and spin the driveshaft by hand. The amount of rotations of the driveshaft per one rotation of the tire is the ratio(ie 3.55:1, 3.73:1 etc) of your gears. Hope this helps.

 

[chris91]

I tried it that way at first and couldnt tell exactly if they were 3.55 or 3.73 since the difference was so minor. I turned the wheel 10 times and it was very clear. Driveshaft spun 37 times=3.73, 35 times=3.55, 41=4.10 etc.

 

[Slykin]

Good idea^^^

 

[chris91]

Yeah it pissed me off after trying twice and not really being able to tell being cramped up under the car. So I said f it after the second time and had the wifey spin the wheel 9 more times. lol

 

[Slykin]

Hey, whatever works lol. I probably wouldn't have thought of that and would have just said eff it and quit!

 

[Hoseitdown]

Ida just said shit on it and bought some 3.73s. lol

 

[chris91]

Ida just said shit on it and bought some 3.73s. lol

Yeah that woulda been a waste since I already had em.. Takes all of 15 minutes to figure it out.

 

[CC'S95GT]

Remember BOTH tires have to spin together for this to work. It will not be accurate if your diff is worn out or you have a 6er and an open diff.

 

[framda]

Spinning it once is all you need. It is easy to tell 3.55 from 3.73. 3.55 goes 3 1/2 times around and 3.73s go 3 3/4 times around. Big difference, same as 6 o'clock and 9 o'clock.