Speedo Gear
Team Owner
Joined: Feb 2003
Posts: 53,841
Likes: 9,284
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
Safety Car
Joined: Sep 2007
Posts: 4,443
Likes: 326
From: Indy Indiana
then your speedo cable is spinning too fast.. you need to slow it down by replacing the existing driven gear by one with more teeth. 1st find out what you have, pull your speedo cable from the tranny and remove the speedo drivien gear housing. in it should be a plastic gear. count it's teeth and buy a new one with more teeth. .( probably buy 2 or 3.. get one each with 1 more tooth, next with 2, next with 3..) each will drop your speedo by a slight amout. play with it and swap them out until you get real close.
you can get them fairly cheap so buy 3 sizes to play with the calibration.
you can get them fairly cheap so buy 3 sizes to play with the calibration.
Burning Brakes
Joined: Nov 2006
Posts: 954
Likes: 40
2022 C3 of the Year Finalist - Modified
You can also buy a reducer - Speedometer Gear Ratio Adapter, and put it on the cable insert on the trans' - more expensive.
Avner
Safety Car
Joined: Sep 2005
Posts: 4,052
Likes: 97
From: Southeast, Tennessee
St. Jude Donor '09 thru '26
then your speedo cable is spinning too fast.. you need to slow it down by replacing the existing driven gear by one with more teeth. 1st find out what you have, pull your speedo cable from the tranny and remove the speedo drivien gear housing. in it should be a plastic gear. count it's teeth and buy a new one with more teeth. .( probably buy 2 or 3.. get one each with 1 more tooth, next with 2, next with 3..) each will drop your speedo by a slight amout. play with it and swap them out until you get real close.
you can get them fairly cheap so buy 3 sizes to play with the calibration.
you can get them fairly cheap so buy 3 sizes to play with the calibration.
if you look on dr rebuilds site you can see the different toothed gears and their "chart" for determining which gear you need to make the correction. it's a good place to start
