question on 66-72 F100 diff ratios
Posting Guru
Joined: Apr 2002
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question on 66-72 F100 diff ratios
What are the most common differential gear ratios found in rear ends from aprox. 1966 to 1972 F100 1/2 tons?
Which is most likely to have the higher (numerically lower) gear ratio? A truck with std trans or a truck with auto trans?
Which is most likely to have the higher (numerically lower) gear ratio? A truck with std trans or a truck with auto trans?
Post Fiend
Joined: Feb 2001
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From: Iowa
question on 66-72 F100 diff ratios
I am sure someone will correct me if I am wrong, but I have purchased one each of 3.70 (1972) and 3.90 (1968) I believe these to be fairly commonly used ratios. I believe the engine size had just as much to do with Fords decision as did type of transmission. Some of the old 6 cylinders were geared pretty stiff. (low)
Dewayne
Dewayne
Postmaster
Joined: Mar 2000
Posts: 3,730
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From: Waynesville, OH
question on 66-72 F100 diff ratios
If you haven't had a chance, another place to post this question would be on the 1961-1966 or 1967-1972 forums. They might have some good additional info.
George
George
(don't remember)
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