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Thread: New to me HMMWV

  1. #1
    2 Star General shannondeese's Avatar
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    Default New to me HMMWV

    I have just, well a month ago picked up an M998 non runner. It was rebuilt in 01. It’s got the 6.5 which I just changed the injection pump on. She runs really well now. Now for the questions.
    The trans doesn’t seem to shift into 3rd. Where should I begin? She will do 55 but is screaming at me while doing it.
    What seats are y’all using. This one has cheap amazon race seats in it
    Thanks.
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    Shannon Deese

    M35A2
    M35A2 Bobbed w/winch
    M35A3

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    TOBASH (10-21-2019)

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    3 Star General TOBASH's Avatar
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    Nice rig.

    Common question [EDIT re. seats]. U might be able to search.
    Last edited by TOBASH; 10-22-2019 at 02:08.
    T.O.B.A.S.H - When we feel frustrated with those around us. LOL


    The Great Wall of China is regarded as one of the Seven Wonders of the World. What is wrong with The Greatest Country in The World building its own???

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    2017 Tesla Model X P100D
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    4 Star General NDT's Avatar
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    55 mph in second gear? Don't think that is possible. The poor 6.5 is approaching 3000 rpm in 3rd at 60.

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    TOBASH (10-22-2019)

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    4 Star General 86humv's Avatar
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    They shift so fast...hard to notice.
    Manual shift it and see what happens.
    86 hmmwv
    M1102
    M101A2
    Lots a hmmwv parts

  7. #5
    2 Star General shannondeese's Avatar
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    Thanks. That’s the plan for today. Manual shift it to see what happens. I also am going to do a little fuel pump timing. I have it too far advanced. I never thought I’d own a vehicle that gets worse fuel mileage than my deuces.
    Shannon Deese

    M35A2
    M35A2 Bobbed w/winch
    M35A3

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    3 Star General TOBASH's Avatar
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    The transition from first to second is very smooth and hard to feel in such a noisy bouncy vehicle. The transition from second to third is more pronounced so it can be confused for the first gear change. Confirm gear changes by carefully power shifting 1-2 and 2-3. There is no good reverse lockout so be careful not to accidentally shift into reverse at speed.
    T.O.B.A.S.H - When we feel frustrated with those around us. LOL


    The Great Wall of China is regarded as one of the Seven Wonders of the World. What is wrong with The Greatest Country in The World building its own???

    1987 M1025 Slantback, 6.2 w/3 speed
    2017 Tesla Model X P100D
    2011 Tesla Roadster
    2003 Lifted Durango with steel bumpers
    1984 Toyota BJ-44 RHD
    Restoring 1975 Toyota Iron Pig

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    4 Star General SCM35A2's Avatar
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    Nice!

  10. #8
    2 Star General shannondeese's Avatar
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    So she is definitely shifting into 3rd. I back the timing off until the line on the block and the line on the injection pump are joined. She still runs well so I’m hoping she gets a little better than the 5 mpg I got on her first trip out.
    Shannon Deese

    M35A2
    M35A2 Bobbed w/winch
    M35A3

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