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Discussion Starter · #1 ·
I just installed a T5 in place on my auto and am trying to figure out which speedo gear to buy. I've got 3.73 in the rear and 225/50/16 for treads. The T5 I bought is new from Ford racing and has the 2.95 first gear and .63 fifth gear. Does that make a difference in my selection or can I consider it a (normal T5)?
 

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You need to know what drive gear you have in the tranny. You are most likely going to need a 21 tooth. there are speedo gear calculators all over the web.
 
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