What speedometer gear for TH350 & 3.73 gears? - Team Camaro Tech
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post #1 of 3 (permalink) Old Apr 6th, 01, 03:44 PM Thread Starter
Join Date: Feb 2001
Location: San Diego, CA
Posts: 14

Dont know how many teeth speedo gear to buy for my 68 camaro. I know the speedo is off though. Any1 know? Thanks.
Eric1 is offline  
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post #2 of 3 (permalink) Old Apr 6th, 01, 09:38 PM
Join Date: Feb 2000
Posts: 101

try this website and fill in the formula at the bottom:
rodsters is offline  
post #3 of 3 (permalink) Old Apr 7th, 01, 04:38 AM
Senior Tech
Join Date: Jun 2000
Posts: 331

I had someone with a working speedometer drive head of me and took 5 mile per hour checks of what my speedometer read vs the correct value. On MS excel I entered this data and formed two grafts one of my reading and one of actual speed. From this I was able to tell my speedometer was 15% off. By increasing or decreasing 1 tooth in the trany speed gear, you adjust the reading by 5%. So I needed 3 teeth. It works great now. Good luck.
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