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DUHHHH!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by blazen91, Apr 22, 2001.

  1. blazen91

    blazen91 1/2 ton status

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    I pulled the d70 out of the duelly tonight. The tag in the glove box says 4.56's and some !@#$ changed them to 3.73's. I haven't checked the front d60 yet. O-well, I still got a good deal on the axles.[​IMG]

    <A target="_blank" HREF=http://www.blazen91.coloradok5.com>http://www.blazen91.coloradok5.com</A>
    Protect the land FOR the people
    Not FROM the people
     
  2. Emmettology 101

    Emmettology 101 3/4 ton status

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    Doh!!!!!!! MAn, that sucks..... Well now if you wanted somethign other than 4.56's, you can get those now..

    Mike - <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>[​IMG]
     
  3. blazen91

    blazen91 1/2 ton status

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    That's what I was thinking. I'm going to run an auto(I haven't decided on the 350 or 400) so I was thinking 4.88 or 5.13. What do you all think? I also found today that the 203 in the truck has a part time in it:)

    <A target="_blank" HREF=http://www.blazen91.coloradok5.com>http://www.blazen91.coloradok5.com</A>
    Protect the land FOR the people
    Not FROM the people
     
  4. riz

    riz 3/4 ton status

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    <font color=purple> That sucks ! I'd be mad since I want 4:56 gears too !

    L8r,
    . Riz . <A target="_blank" HREF=http://www.geocities.com/rizmonkey>http://www.geocities.com/rizmonkey</A>

    [​IMG]
     
  5. Emmettology 101

    Emmettology 101 3/4 ton status

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    Ratio would depend on the tires size... up to 35's i wouldn't go past 4.88's without OD..... Running anything bigger, go 5.13's........... This is just my opinion... Although if the truck doesn't see the pavement alot and is trailered, go as low as you are comfortable with.

    TH350 or TH400.... Hmm..... Not sure what to tell ya there. I have beat my th350 pretty good and even had it boil over once and it still shifts good... But the th400 is definately a BRute!!

    Cool beans on the part time kit... It will save you some cash since you dont have ot buy it!

    Mike - <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>[​IMG]
     
  6. blazen91

    blazen91 1/2 ton status

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    Thanks Mike. the truck is going to be used 90% as a trail rig, and I am going to build a trailer. I also plan on running some 37" Good year MT military take-offs. I can get them for $25 ec. and they are about half worn. With that, would you say 5.13's?

    Also I am getting a 350/205 and I have the 400/203. Assuming I didn't go with a dubler(spelling sucks) Which would you suggest? Thanks again.

    <A target="_blank" HREF=http://www.blazen91.coloradok5.com>http://www.blazen91.coloradok5.com</A>
    Protect the land FOR the people
    Not FROM the people
     
  7. Emmettology 101

    Emmettology 101 3/4 ton status

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    I would go as low as possible.. Since you will trailer it alot, then I would go ahead with the 5.13's as long as you dont mind the low MPG on the street. Also, cruising the highway on occasion, you will be pulling high RPM...

    Here are some RPM figures between the 2 gear choices at 60mph:

    4.88 w/37's - 2730rpm

    5.13's w/37's - 2870rpm

    These are from Randy's Ring and pinion calculator.. For a SBC the recomended rpm range is from 1800-2800 @60 mph... So you would be a llittle over on the 5.13's, but I think that is the ratio I would go with...

    Link to calculator: http://emmett.coloradok5.com[​IMG]
     

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