Speedo Gear question

tritonofg

New Member
Nov 25, 2007
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San Diego
I removed the tailhousing from both the T-45 from a GT and My Cobra. Which one is the speedo gear and do I really need to swap?

First picture is T-45 from GT...seems the gear has 14 teeth.
Second is T-45 from Cobra...it also has a gear w/ 14 teeth...
do I really need to change them to have an accurate speedo?

I am talking about the smaller gear...
 

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