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  1. #1

    Default What transmission do I have? 4l60 or a 700r

    i have a 1996 gmc 1500, with the 305 vortec, auto trans with overdrive. Is it a 4l60e or a 700r4? Please help. Cheers and thanks. Lid.

  2. #2

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    Quote Originally Posted by lidster777 View Post
    i have a 1996 gmc 1500, with the 305 vortec, auto trans with overdrive. Is it a 4l60e or a 700r4? Please help. Cheers and thanks. Lid.
    Inside your Glove Box......is the RPO Code's for your truck.......To find out what Transmission you have.....your going to be looking for one of the Following RPO Codes,

    RPO Code....MD8 .....Is a....TRANSMISSION, AUTO 4 SPD, THM 700 R4

    RPO Code....
    M30,,.....Is a....TRANSMISSION, AUTO 4 SPD, HMD, 4L60E, ELECTRONIC

    And to see what your Truck came with from the Factory, Go to the Below Site and Enter your Trucks Vin # Number......it will show you everything your Truck came with.....From the Drive-train to what Color of interior,

    Link,
    http://www.compnine.com/vid.php



    MIKE


    99"SILVERADO
    5.3 l 3.73 l G80
    BLACK BEAR CUSTOM TUNE
    SNUGTOP l COLORMATCH l KATZKIN










  3. #3

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    its a 4l60e the 700 and 4l60 are the same trans with some internal changes they started that in the early 90s. the 4l60 became the 4l60e in 93 94 when they added a electronic valve body hints the e

  4. #4
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    Default

    Quote Originally Posted by cwbontheyfz View Post
    its a 4l60e the 700 and 4l60 are the same trans with some internal changes they started that in the early 90s. the 4l60 became the 4l60e in 93 94 when they added a electronic valve body hints the e
    cwbonetheyfz is correct, you should be able to see the connectons for the elect.



    91 Suburban

    D44/14BFF w/Disc conv - Yukon 4:88's - Yukon Grizzly Lockers F/R -13" lift - DIY4x Shackle Flip - 37 ATZ on 18 MT Classics - Doug Thorley headers - Magnaflow - Holley Pro Jection Intake - Ultimate TBI mods - Hydroboost Brake Conversion - Hysteer-X Over Conversion.

    (Coming up - Fuel Injected 383 Stroker - Divorced NP205 - D60 - 40" tires)

  5. #5
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    True, there are elect connections on the 4L60E but there are also electrical connections on the 4L60 & the 700R4 for electric speedometer, & the lockup convertor solonoid, so 99Heartbeats (Mikes) explanation of the PRO codes is the best way to check, so as not to be confused by seeing wires going into your transmission.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


  6. #6

    Default

    Quote Originally Posted by 99'HEARTBEAT View Post
    Inside your Glove Box......is the RPO Code's for your truck.......To find out what Transmission you have.....your going to be looking for one of the Following RPO Codes,

    RPO Code....MD8 .....Is a....TRANSMISSION, AUTO 4 SPD, THM 700 R4

    RPO Code....
    M30,,.....Is a....TRANSMISSION, AUTO 4 SPD, HMD, 4L60E, ELECTRONIC

    And to see what your Truck came with from the Factory, Go to the Below Site and Enter your Trucks Vin # Number......it will show you everything your Truck came with.....From the Drive-train to what Color of interior,

    Link,
    http://www.compnine.com/vid.php


    Thanks so much, for the valuable info, Mike, and to everyone else that responded. Thanks again and CHEERS!

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