speedo's too fast by 10-20 mph ??? - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
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post #1 of 3 (permalink) Old Oct 26th, 03, 04:59 AM Thread Starter
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Join Date: Nov 1999
Location: brandon, ms. usa
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just bought a 68 cutlass conv. speedo is off about 10 miles faster than the car is going under 60 mph and maybe about 15-20 mph when you get over 70 mph (i'm doing over 90 on the speedo to keep up with fast interstate traffic). it also starts boucing a little bit when you run it over 90 mph. it has a th400 with i think 3:08 gears in a limited slip 12 bolt. tires have been replace with 15" and the size is 245/15/60. guess the gear needs to be replaced. i have never done this. how hard is it to do and is there a way to tell which gear i need without taking out the old gear first?

To see a pic of my car, <A HREF="http://images.honesty.com/imagedata/h/522/43/25224385.jpg" TARGET=_blank> click here...</A>
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post #2 of 3 (permalink) Old Oct 27th, 03, 01:07 AM
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Join Date: Sep 2001
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This should help you out-

http://www.novaresource.org/speedo.htm
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post #3 of 3 (permalink) Old Oct 27th, 03, 03:03 AM
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Join Date: Dec 2001
Location: Buffalo, NY
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TCI has a nice speedo calculator on its site also. Tire height, gears ect..

69 cranberry red convertible
LT1 4L60E NY "BADASELL"
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