c6 ford speedometer gear

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410merc

Active member
Joined
Apr 7, 2014
Messages
43
hi, I have a question , on my 74 ford f100 it has 3.25 gears and I found a set of 2.75 gears so heres my question I have the correct speedometer gear when I change the speedometer plastic gear do I have to change the gear inside the tiail housing to or not?
 

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