Best gear ratio for ford 8 inch?

Discussion in 'Technical' started by Chase Reed, Aug 17, 2014.

  1. Chase Reed

    Chase Reed Member

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    I have a ford 8 inch in my 75 merc comet but it has 2.79 gears. What is the best ratio for all round crusing and gettin' of the line...
     
    Chase Reed, Aug 17, 2014
    #1
  2. Bryant

    Bryant forgot more than learned

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    i like 3.25 if you dont have an overdrive transmission. they give a noticeable increase off the line and you can still go 70mph on the freeway with out the motor reving to high.
     
    Bryant, Aug 17, 2014
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    Crazy Larry and Acornridgeman like this.
  3. Acornridgeman

    Acornridgeman MCCI Wisconsin State Rep Moderator Supporting Member

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    :agreed: - the 3.25 would be a real wake up with the automatic transmission.

    The stock 3.00 that came with a manual transmission car would be a step up too and pretty easy to find.
     
    Acornridgeman, Aug 17, 2014
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  4. rthomas771

    rthomas771 Member

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    I swapped my 2.79 to a 3.00 and it made a big difference in off-line pick up...increased mpg's too. I'm going to swap to a 3.25 now that I have a manual overdrive transmission
     
    rthomas771, Aug 17, 2014
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  5. 71gold

    71gold Frank Cooper Supporting Member

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    what transmission and engine?
     
    71gold, Aug 17, 2014
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  6. spxer

    spxer Member

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    i swapped out the 2.79 8 inch for a 3.50 9 inch was like a completely different really let that small block rev
     
    spxer, Aug 17, 2014
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  7. Hottrod1991

    Hottrod1991 Member

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    check out the DPI Platinum Track torsen/worm gear unit
    I'd also do 3.25 max if no O/D
    mine came with 3.00 stock since mine originally had the 250i6
     
    Hottrod1991, Aug 19, 2014
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  8. mav1970

    mav1970 Bob Hatcher

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    3.50 is what came stock in my 72 Gran Torino Sport - nice all around gear
     
    mav1970, Aug 19, 2014
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  9. rotorr22

    rotorr22 Member

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    3.55's if you have an 8" and an OD tranny.
     
    rotorr22, Aug 20, 2014
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