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4:56 or what

Discussion in 'The Garage' started by chills88k5blaze, Feb 11, 2006.

  1. chills88k5blaze

    chills88k5blaze Registered Member

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    I am trying to find some info I am running 35's on my 88 K5 this is my Daily Driver so you know with stock gears my MPG Sucks so can any one tell me by upgrading to 4:56 how much would that improve my MPG.

    I am also thinking of geting EFI Manifold where should I get that LMC has one for just under 1300.00 has every thing you need to install but it I am trying to see if I can get it cheaper. any help would be great.
     
  2. '71k204x4454

    '71k204x4454 Registered Member

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  3. OffRoad

    OffRoad 1/2 ton status

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    if your tranny has overdrive, use 4.56s.
    if your tranny doesn't have overdrive, use 4.10s.

    unless you don't drive on the highway much, then run 4.56s anyway.:laugh:
     
  4. chills88k5blaze

    chills88k5blaze Registered Member

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    Yes I have OD tranny and 4.56's would be great but after doing the greas can anyone tell me what i may get as far as MPG right now I get maybe get 10 mpg. and that is killing the Bank.

    (so you all know I know having an old truck dose mean its going to suck the gas I am just looking to improve that just a bit)
     
  5. RubberFloorMat

    RubberFloorMat 1/2 ton status Premium Member

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    thats one of the things im looking at too, at 70mph im turning 1800rpm in OD.

    it hunts between gears on the hiway alot, i dont want to tear up the od band.

    im thinking it must have like 3:08's in the rear to turn that low with 33"s

    im thinking 3:73 or 4:10's, which would be better for a mostly street driven with a few trails??? is there as much diff as there is in a street car??
     
  6. yunit

    yunit 1/2 ton status

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    4.10's with 35's
     

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