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Thread: 6.5 Diesel Block Identification (moved from navistar thread)

  1. #21
    Join Date
    Apr 2006
    Location
    Cedar Grove, NC
    Posts
    155

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    I couldn't find the part in the humvee manuals, but I was able to identify it as part # 12339141 through kascar Bracket, Electrical Modulator Control

    Bracket, Electrical Modulator Control,1993 and 1994 H1 and all HMMWV with Turbo 400 Transmission
    84 C10 J code intake.

    83 C10 Scottsdale w/veggie conversion.

    98 K3500 Silverado CC DRW, marine injectors, 4" exhaust (kitty cat MIA), boost and egt gauges, FSD relocated, #9 resistor thingy, reman Navistar block from Kennedy installed Jan 08, Reese Signature Series Gooseneck hitch.

    95 C2500 F code. Rebuilt GEP. Daily driver since Jan 2014.

  2. #22
    Join Date
    Apr 2001
    Location
    Newberg Oregon
    Posts
    12,282

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    That makes perfect sense.

    I had forgotten about the "NON vacuum" modulators on the MIL Hummers
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2005 Suburban (Papa Smurf)
    THIS IS BOW TIE COUNTRY

  3. #23
    Join Date
    Feb 2000
    Location
    Montana
    Posts
    11,382

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    Anyone have part numbers for the cable and modulator?

  4. #24
    Join Date
    Apr 2006
    Location
    Cedar Grove, NC
    Posts
    155

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    Quote Originally Posted by More Power View Post
    Anyone have part numbers for the cable and modulator?
    I don't know much about humvees and I know even less about transmissions but these are parts that I believe might be involved. Use these as a jumping off point only.

    trans control module 5714645
    connecting link 12339149
    modulator 5596528
    kick down switch 5572065
    84 C10 J code intake.

    83 C10 Scottsdale w/veggie conversion.

    98 K3500 Silverado CC DRW, marine injectors, 4" exhaust (kitty cat MIA), boost and egt gauges, FSD relocated, #9 resistor thingy, reman Navistar block from Kennedy installed Jan 08, Reese Signature Series Gooseneck hitch.

    95 C2500 F code. Rebuilt GEP. Daily driver since Jan 2014.

  5. #25

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    OK now you have identified that what is this on the side of pump
    Attached Images Attached Images

  6. #26
    Join Date
    Feb 2000
    Location
    Montana
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    11,382

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    Quote Originally Posted by ashbee37 View Post
    OK now you have identified that what is this on the side of pump
    Is that the "kick-down" switch? I know that the VRV (vacuum regulator valve) used in the civilian app includes a KD switch in addition to the variable vacuum regulator.

    trans control module 5714645
    connecting link 12339149
    modulator 5596528
    kick down switch 5572065
    Trans control module? That's what a computer is called for the Allison 1000. The TH400 is not computer controlled.

    When I toured AMG's Mishawaka HMMWV plant in 2006, I learned that AMG used a separate TCM in the mil-spec HMMWV for the 4L80-E. Not sure what company provided it.

  7. #27
    Join Date
    Jun 2010
    Location
    Southern Delaware
    Posts
    139

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    The cable operated modulator is sometimes refered to (erroniously) as a module instead of as a modulator.
    1993 Suburban 2wd 6.2L Diesel Conversion "Andromeda":
    3.73:1 gears, THM 700-R4 transmission, and
    J-code 6.2L diesel from a 1984 C2500 Suburban

    1996 2wd to 4wd converted Ford F-150 300ci Inline 6 "The Argo" 336,000 miles and climbing

    1992 Caprice Wagon 5.0L V8 "Enterprise-D"

    "Ah ha ha ha! I swear! Tractors is so dumb!" - Mater

    "The Argo? That ridiculous pile of scrap metal!"

  8. #28
    Join Date
    Apr 2001
    Location
    Newberg Oregon
    Posts
    12,282

    Default

    That little unit has a wire harness coming out the opposite end from the little roller.

    My bet is that its the kick down switch for the TH400.

    The civy trucks have a little switch mounted under the dash that the arm on the throttle pedal activates.

    I have never gotten real close and personal with a MIL Hummer, so I can't say for sure.

    It makes sense that any and all important controls for the engine and tranny would be industrial quality and not the cheezy little plastic stuff that we see on the civy stuff.

    If that is the kick down switch, the contacts would close at or near the WOT position.

    There is likely two wires in the little harness. The kickdown Solenoid is a simple device thats either on or off.
    Activating the switch would turn the solenoid on and cause the 3-2 downshift or 2-1 downshift depnding on road speed.

    The cable device controls the throttle pressure which also controls line pressure in the tranny.

    More throttle = more hydraulic pressure to the clutches etc.

    The reason for the cable control would be simple, the HMMWV does not use a vacuum pump and it would also likely be considered a "weak link" in the system.
    The cable is a pretty much "Bomb Proof" way to go.

    Interesting goodies you have there.


    Missy
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2005 Suburban (Papa Smurf)
    THIS IS BOW TIE COUNTRY

  9. #29
    Join Date
    Jul 2015
    Location
    Alberta CANADA
    Posts
    5

    Default got a weird code

    I got code # M196 can any one help me for the year of this block Thanks

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