rear end gear ratios

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  • #10270
    young_olds
    Participant

    I was looking at the artices to get an idea of what my cars might have for gears but I dont know what the 117/116 means. Both are 62’s one is a f-85 coupe with 15″ wheels and a 3 speed manual, the other is a deluxe(i believe) wagon. Are there axle codes so I can find out without opening them up?

    #10271
    young_olds
    Participant

    117/167 not 116

    #10272
    oaklyss
    Participant

    You can mark the driveshaft and tire and spin the tire 1 revolution and count have many times the dive shaft rotates. That would be the ratio.

    #10273
    young_olds
    Participant

    I know that method but it only gives you an approximate that you can try to match with available gear ratio’s.

    #10274
    oaklyss
    Participant

    I found the axle codes in the 63 Assembly manual. There is a stamped code on the rear cover edge, passenger side, at the 3 o’clock position. Mine is C-201. The C means 3.36, the 201 is the Julian date code (day number of the year). The only other codes are A for 3.08, B for 3.23. Posi rears would have a X in a circle before the codes. Hope this helps.

    #10275
    young_olds
    Participant

    Thanks that’s exactly what I was looking for. It was kind of hard to read but I made out a b, so my red car should have 3.23’s

    #10276
    young_olds
    Participant

    I checked my wagon and it has a c. so assuming the cover and gears are original to both cars my f-85 coupe has 2.23 and my wagon has 3.36

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