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dans55
04-21-2012, 07:48 AM
I am using the original speedometer and cable on my 55 wagon.The trans is a 350 turbo. The speedometer is showing way faster than the actual speed.Is there an adapter I need to use or do I need to change the gear in the trans.?

Run-em
04-21-2012, 08:23 AM
Change the speedometer gear in the transmission.

dans55
04-22-2012, 07:13 AM
Thanks,that was what I was thinking..

chevynut
04-22-2012, 07:34 AM
Check out this site...there is an excel spreadsheet to help you choose the right speedo gears, and they sell them too.

http://www.performanceautomatic.com/products/parts-and-accessories/speedometer-gears/speedometer-gears.html

markm
05-09-2012, 11:14 AM
[QUOTE=dans55;2178]I am using the original speedometer and cable on my 55 wagon.The trans is a 350 turbo. The speedometer is showing way faster than the actual speed.Is there an adapter I need to use or do I need to change the gear in the trans.?[/QUI

If you have a 3.55 gear in rear and your tire is equal to a G70/15 in height go to dealer and buy speedo gears for a 78 Corvette equipted like prevously stated. That is how I got 9it right.