slipknotron1626

My speedometer is off by half lol. When it shows I'm going 120 I'm really going 60. I have tried fixing it I have a yellow 7 tooth drive gear. I got a pink 6 tooth from Cj pony parts but its to big for the tranny. right now I have a 4.10 should I replace it or just saw f*** it and drive it they way it is?

slipknotron1626

anyone?

5.0rick

Need more info. Please post the following:
What tires are you running? size and brand
What transmission?T-5? What year?
What gear ratio? 4.10s right?
What speedometer? Is it the original or out of some other year? I am assuming it's a 140 MPH speedo

Rick


http://www.mindspring.com/~steveflye...ear_select.htm

slipknotron1626

I dont remmber the tire size off hand but they are a bit taller then stock I think it was 225
I have a 1993 cobra tranny
I have the 140 mph
4.10

5.0rick

You need to get the exact tire size that you are running. need to figure out the tire height. That will determine the revs per mile. The tool I linked in needs that info.http://www.mindspring.com/~steveflyer/speedo_gear_select.htm

You will also need to know the nunber of teeth on the speedo drive. Again, look at the link I sent for guidance.(looks like your tranny has an 8T drive gear)

It looks like the only possible combination for 4.10 gears is a 6 tooth drive gear (gear in tranny onoutput shaft)with a 20 tooth driven gear (gear on VSS (speedo cable)). That isof course with a standard tire height of 24.75 -25.25". If your tire is a bit taller, then maybe a 6T, 19T would be close.

With all that said, Based on the year you specified, if your tranny has an 8T drive gear, it will need to be replaced with a 6T. Major PITA. You will have to remove the back half of the tranny to do so. Sorry man, probably not what you wanted to hear.

Regards,

Rick

slipknotron1626

its cool the thing is I bought a 6tooth and it didn't fit the tranny shaft so right now I have a 7tooth drive gear with a 21 tooth speedo gear.