Quote:
Originally Posted by jrjmac1
Hi Duane,
I got a complete Ford 9" posi third member with a 3.00 gear ratio off of eBay for $204.00. Sean is going to check it out and install on Tuesday. What do you think of the 3.00 ratio?
John
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My answer depends on a few things, and we can chat more about it on the next drive. But here is a first answer based on limited information. The wet weight of your car, the camshaft you have in it, and the ratio of your gears in your trans are also part of the equation in giving you a final answer of how it will behave. It all factors in to the final result. I've run 3.08s in my first Cobra with a Big Block (smaller than yours), and they were fun to drive in a Cobra, but can be a little questionable "at first" until you get use to it. We put 3.08s in Alans Red Arntz Cobra, and he has a wide ratio trans. It would be good to know if you have a close ratio (1-3/8) or (1-1/16th) wide ratio Toploader trans? Going from 3.7 to 3.0 is going to be a noticeable change and less noticeable on a wide ratio trans, but still very noticeable. Close ratio makes for a very long 1st gear, but many of us do it. You will notice that 1st gear is not quite as responsive as before with the 3.73s right off the line for the first split second you let out the clutch (minor) but once it starts rolling at all you will enter a whole new spectrum of time between gears through 4th, and you'll actually be able to drive your car on the freeway, longer trips, with less RPM, it will be less noisey on long trips (better on the ears), and not having to fill the tank up so quickly as before on those longer trips. Give yourself time to adjust to it and realize the new benefits.
