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transmition gear ratios

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by zach78k5, Apr 13, 2001.

  1. zach78k5

    zach78k5 1/2 ton status

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    does anyone know the gear ratios of the three gears in a TH350, what about a TH400? i am curious as to the difference between the two transmitions
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    E-town baby!
    Well third gear in both is 1 to 1 [​IMG] I don't know what second is though First gear for the TH350 is 2.54 to 1 (I think) and the TH400 first is like 2.48 to 1.
    For comparison the 700 R4 has a 3.06 to 1 first...and a .70 to 1 OD.

    Hope that helps.

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    Heres a little listing I founbd online:

    The set up is Model, 1st, 2nd, 3rd, 4th, 5th (if any), applications.
    T-19Wide, 6.32, 3.09, 1.68, 1:1, Ford, Jeep, International
    T-19Midi, 5.11, 3.03, 1.79, 1:1, Ford, Jeep, International
    T-19Close,4.03, 2.41, 1.41, 1:1, Ford, Jeep, International
    T-18Wide, 6.32, 3.09, 1.69, 1:1, Ford, Jeep, International
    T-18Close,4.02, 2.41, 1.41, 1:1, Ford, Jeep, International
    T-4 4.02, 2.37, 1.50, 1:1, Ford, Jeep
    T-5 4.02, 2.37, 1.50, 1:1, .76 Ford, Jeep
    SM420 7.05, 3.57, 1.70, 1:1 Early GM
    SM465 6.55, 3.58, 1.57, 1:1 Later GM
    NP435 6.68, 3.34, 1.79, 1:1 Ford (Jeep)
    NP435 6.68, 3.34, 1.66, 1:1 Chrysler
    NP435 4.78, 2.39, 1.37, 1:1 Chrysler
    NP445 4.56, 2.28, 1.31, 1:1 Chrysler
    T-98 6.40, 3.09, 1.69, 1:1 Early Jeep
    T-176 3.52, 2.27, 1.46, 1:1 Jeep
    T-177 3.82, 2.29, 1.47, 1:1 Jeep
    T-178 3.00, 2.08, 1.47, 1:1 Jeep
    NV4500HD 6.34, 3.44, 1.71, 1:1, .73 GM(only a couple years)
    NV4500HD 5.61, 3.04, 1.67, 1:1, .75 Chrysler(GM similar later)
    NV3500 4.01, 2.32, 1.40, 1:1, .73 Chrysler
    GM/MW1 4.03, 2.37, 1.47, 1:1, .86 GM (similar to T-5)
    AX5,AX15 3.83, 2.33, 1.44, 1:1, .79 Jeep
    ZF-5 5.72, 2.94, 1.61, 1:1, .76 Ford-German
    BA10/5 3.99, 2.33, 1.44, 1:1, .79 Jeep
    BW SuperT10-U 3.44, 2.28, 1.44, 1:1 ?
    SOME AUTOMATICS:
    E40D 2.40, 1.47, 1:1, .67 Ford up to 1 ton
    TH400 2.48, 1.48, 1:1 GM, Jeep
    TH350 2.52, 1.52, 1:1 GM, Jeep
    700R4 3.06, 1.63, 1:1, .70 GM
    C-6 2.46, 1.46, 1:1 Ford
    ZF-SF-42 4.14, 2.37, 1:1, .70 Ford Diesel (German)
    TF904/727 2.45,1.45, 1:1 Chrysler, Jeep
    4L60E 3.08, 1.88, 1:1, .79 GM up to 1 ton
    47RH ? Chrysler H.D.
    A4LD ? Ford light duty
    42RE 2.74, 1.54, 1:1, .69 Jeep Grand Chrokee
    Asin 4-S 2.80, 1.55, 1:1, .69 Jeep Cherokee


    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     

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