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What gears??

Discussion in 'The Garage' started by Tshane, May 18, 2003.

  1. Tshane

    Tshane 1/2 ton status

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    <FORM METHOD=POST ACTION="http://coloradok5.com/forums/dopoll.php"><INPUT TYPE=HIDDEN NAME="pollname" VALUE="1053319271Tshane">


    4:56 or 4:10 gears
    <input type="radio" name="option" value="1" />4:56
    <input type="radio" name="option" value="2" />4:10
    <INPUT TYPE=Submit NAME=Submit VALUE="Submit vote" class="buttons"></form>

    I have a 86 shortbed with a built up 383. It has a 700r4 for a tranny and a 208 transfer case. I'm going to be running 35' tires. I'm starting to lean toward the 4:10 gears because of the low first gear and the power the engine will have. Also the possible milages with overdrive.

    Thank for your guys opninon
     
  2. SUBFAN

    SUBFAN 1/2 ton status

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    just my .02 tho, I want 5.13 /forums/images/graemlins/grin.gif
     
  3. Swanson52

    Swanson52 1/2 ton status

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    4.88 or 5.13. /forums/images/graemlins/thumb.gif
     
  4. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    with a 700r4 go with 4:56's /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif
     
  5. zakk

    zakk 1/2 ton status

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    MY GOD!!

    DOES NO ONE LISTEN TO FAT KIDS!?!?!!?

    [ QUOTE ]
    Dr. zakk’s Dissertation on why 5.13’s are the best choice for a 700R

    Recently, I made the switch to 5.13’s in my D60/14B combo. I run a mildly build TH350 and 39.5” TSL’s. The 4.10’s I did have were killing everything: the motor, the trans, freeway “ get up” …all of it was terrible.

    So, after typing this up a few times, I will commit this document to the annals of time, and have a friend of mine host it.

    The problem with larger tires and a 700R and larger tires, is that you can’t seem to get enough RPM’s to get the OD to properly engage.

    Dr. Watson of ORD fame has this problem with the Art Carr 700R and his 42’s. There is just not enough RPM’s to shift in OD. So what little freeway driving he does do, is all done in Drive.

    When we mix this with tires in the 35-38” range, 5.13’s are a great choice.

    Assuming a true tire dimension of 35”, a vehicle with a small block motor mated to a 700R would spin 2241 RPM’s. Running with 4.88’s would have the engine humming along at 2132 RPM’s, only saving 109 revolutions of the motor per minute. All are calculated at 65 MPH.

    Assuming a true tire size of 37”, 5.13’s would net 2120 RPM’s at 65 MPH.

    Most small block motors are comfortable running between 1800 and 2800 RPM’s. 5.13’s with the addition of OD allow this number to be on the lower end of the spectrum, while allowing for maximum acceleration and off road performance. Gearing can make a motor that is slightly lighter on power really come alive, as I have found with my mild small block 350 with approximately 285HP at the flywheel.

    In closing, unless you bought your axles with 4.88’s already installed, there is no reason that this author sees to not go with 5.13’s from your present gear ratio.

    Let the flaming begin…

    [/ QUOTE ]


    Find the Thread Here, It Has Also Been Linked Back Here!
     
  6. Swanson52

    Swanson52 1/2 ton status

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    [ QUOTE ]
    MY GOD!!

    DOES NO ONE LISTEN TO FAT KIDS!?!?!!?

    [/ QUOTE ]

    I tried, man. I will continue to spread the word on 5.13's, as you have converted me. /forums/images/graemlins/deal.gif
     
  7. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    i have a 350+700R4+np205 and IMO 4.56s are too low (numerically) for highway/OD use. My rpms were too low last road trip I took... 4.88s prolly woulda been juuuuust right, and even 5.13s woulda been np.

    j
     
  8. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    4.88 or 5.13
     
  9. outlaw612

    outlaw612 1/2 ton status

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    Im running 4.56's with 36" tires and wish I had gone lower(numerically higher). How about you buy me some 5.13's and Ill give you my 4.56's! /forums/images/graemlins/thumb.gif
     
  10. Confedneck

    Confedneck 3/4 ton status

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    ok, so you guys are talkin 5.13s with 35s and a 700r4? how about 4.10s with 37s and an sm465?
     
  11. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    im running 38x13x16in tsl's with a sm465np205 and 4:10 combo and i wish like hell i had 5:13's
     
  12. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Shannon...with those gears you'd be turning over 3000 at 65. With an SM 465 4.56's are good up til 39.5's, maybe even 42's if you have a decent motor.

    I ran 4.56's with my 36's for about 2 months and I hated it, I avoided the freeway whenever possible. Same gears with 39.5's is tolerable on the freeway and great everywhere else.

    Rene
     
  13. Hossbaby50

    Hossbaby50 3/4 ton status

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    Here is my experience:

    I am currently running 4.56 gears with a 700R4 and 35" BFG MT's (34" real height). I am running a mild 350, and I can't really cruise at 75 mph unless its pretty flat. I can't keep the motor in the power band to cruise were I want to. I wish now that I had went to 4.88's or maybe 5.13's for my truck. Now I have to regear or beef the motor some more.

    I can cruise at 65 or 85 in my truck, but I can't keep 75 up for the life of me in an area with small rolling hills.
     
  14. 83ZZ502_Jimmy

    83ZZ502_Jimmy 1/2 ton status

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    [ QUOTE ]
    MY GOD!!

    DOES NO ONE LISTEN TO FAT KIDS!?!?!!?

    [/ QUOTE ]

    /forums/images/graemlins/rotfl.gif /forums/images/graemlins/rotfl.gif

    It seems like it sometimes. /forums/images/graemlins/tongue.gif /forums/images/graemlins/grin.gif

    John
     
  15. Swanson52

    Swanson52 1/2 ton status

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    [ QUOTE ]
    DOES NO ONE LISTEN TO FAT KIDS!?!?!!?

    [/ QUOTE ]

    At the McDonald's counter they do.
     
  16. zakk

    zakk 1/2 ton status

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    [ QUOTE ]
    [ QUOTE ]
    DOES NO ONE LISTEN TO FAT KIDS!?!?!!?

    [/ QUOTE ]

    At the McDonald's counter they do.

    [/ QUOTE ]

    till I order a Diet Coke with my #4 LOL!! /forums/images/graemlins/rotfl.gif
     

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