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How many running 4:10 and 36"

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BlazerBoy, Mar 28, 2001.

  1. BlazerBoy

    BlazerBoy 1/2 ton status

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    How many running 4:10 and 36\"

    How many guys are running 4:10 gears with 36" tires, 700r4 and a 208?? I am curious because I am upgrading to 3/4 ton and they are set up with 4:10's. I have 4:56 in my 1/2 ton right now and they are about right. Just wondering how they are?? wouldnt do it.. or will the 4:10's be perfect..


    BlazerBoy
    http://generalblueballs.coloradok5.com<P ID="edit"><FONT SIZE=-1>Edited by BlazerBoy on 03/29/01 05:14 AM (server time).</FONT></P>
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Re: How many running 4:10 and 36\"

    Well, my setup is close but no cigar. I run 4.10's and 35" tires with the NP 205 t-case. The combos are GREAT!!! At least to me they are. Some may like different combos. All depends on what you do as far as off roading and driving on the street are concerned. As for your 4.56's, they are a good combo with 36" tires. Just if you drop down to 4.10's, your mileage may increase a bit. That, in layman terms, will lower your RPM, which in turn will mean better gas mileage. You will also be able to take the freeway speeds better than the 4.56. Just my opinions here.
     
  3. Chris Demartini

    Chris Demartini 1/2 ton status

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    Re: How many running 4:10 and 36\"

    <font color=blue>I have 4.10s and 36s, I like it but I wouild like 4.56s better since the only time my truck is on the highway is going to and from the woods. I dont think its worth the costs to change from 4.10s to 4.56s so I'll keep it the way it is.

    thatk30 guy- lower RPMs dont always mean more MPG. If anything, it will mean less since the motor isnt in its powerband and has to work harder to move the vehicle since there isnt as much torque multiplication. My truck came with 3.07s, when I went to 33s I lost a lot of mileage. I had to be in the gas more to keep it moving since the motor was spinning to slow. After I went to the different gears, I saw a slight increase mileage (still sucks gas but oh well) because I didnt have to use as much trottle. The motor was spinning faster, but it didnt have to push the truck as much as it did before. </font color=blue>

    [​IMG]
     
  4. Emmettology 101

    Emmettology 101 3/4 ton status

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    Re: How many running 4:10 and 36\"

    I have 4.10's, 35's, 208, and a TH350... I like it, but would probably go to 4.56's if I had the chance.

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>

    "Pimpin aint easy!"
     
  5. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Re: How many running 4:10 and 36\"

    Yep, youre right on all counts. But the main thing I look at when running higher RPM's is engine life. The faster the engine turns over, the shorter the life. This is especially true when you run a big block at, say, 3000 RPM compared to another motor running higher gears and the RPM at 2500. I do not want to go so low as to run the motor "way" up there and loose too much gas with having too much power.
     
  6. Emmettology 101

    Emmettology 101 3/4 ton status

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    Re: How many running 4:10 and 36\"

    I forgot, my bro is runnign a 700r4/208 and 4.56's.. he is running at about 3K @ 60 in 3rd

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>

    "He who uses a winch...... Is tired of yankin!"<P ID="edit"><FONT SIZE=-1>Edited by Emmettology 101 on 03/31/01 11:17 AM (server time).</FONT></P>
     
  7. AgDieseler

    AgDieseler Certified Scrap Producer Premium Member GMOTM Winner

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    Re: How many running 4:10 and 36\"

    I have 4.10s, 35"s, and am turning just over 2000 RPM at 75mph. The combination of the overdrive, 35s, and diff ratio lends around 16mpg. I'm stepping up to 36"s soon, so we'll se how that goes.

    David Oliver
    '85 'burban - 6.2L J NA
    5.5"lift, 35"BFGs
    *B&B 6.2L TD and beefed T-700 coming soon*
     

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