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ferd 9" axles, ratios early 70s late 60s ?

Discussion in 'The Garage' started by R72K5, Jan 9, 2005.

  1. R72K5

    R72K5 Banned

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    i need to find out what ratios were most common under early mid 70s like 74-79 or so big foerd cars like granada and LTD and grand marquis and such, and also 67-72 F-100 trucks and maybe 73-79 or so F150/150 trucks

    i was always under impression 3.55 later 70s and 4.10 trucks earlier years

    right ?


    who knows ? who to ask ? where ?

    last one i checked was 3.55 and from under a 2 door 76 grand marquis with 360 and auto trans we took to shredder

    i think im gonna go with one of these axles since they are common and cheap and such, for the 84 c-10


    so i can change ratios easily depending on if i need highway gear(3.55) or hauling gear(4.10)

    if those really are the ratios that were put in those back then

    thanks
     
  2. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

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    The I got came out of an '82 F-150 and it had a 3.50 gearset.
     
  3. R72K5

    R72K5 Banned

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    ok yep there it is,,, 3.50 yep

    thats the one

    ok, 3.50 was the common one it seems like, early mid 70s and older mainly


    right ?

    thanks
     
  4. diesel4me

    diesel4me 1 ton status Premium Member

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    high ratios too

    I saw a lot of high geared ones in many mid to late 70's and 80's cars,especially the big land yachts like lincolns and grand marquis,LTD's,etc--we went hunting for a 9 inch chuck for a 67 econoline pick up my brother had,we found several that were in the 2.56-3.23 range before finally finding a 3.50 ratio in one crown vic that looked like an unmarked police car..

    I'm not positive,but I've heard a 9 inch ford axle from a 75-77 large ford or merc station wagon with leaf springs is the closest in width and spring spacing to put in a 73-87 GM truck,and the "5 on 5" bolt pattern on the wheels is the same as 2wd GM trucks..never done one myself,so this info might be wrong,just something I overheard at the boneyard one day...happy hunting....dont know why you dont put a 14 bolt FF under it--it practically bolts in!--maybe you dont want to carry 2 spares ??..:confused:
     

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