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Thread: 4G53 5 speed gearbox or overdrive

  1. #1
    Junior Member
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    Jul 2008
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    Tewkesbury UK
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    4G53 5 speed gearbox or overdrive

    I have a 1975 SWB Mitsubishi Model J26 "Jeep".

    I am looking to change or convert the original 4 speed gearbox (attached to the 2.4 Ltr 4G53 "ASTRON" engine)
    to a 5 speed or attach a suitable overdrive.

    The little truck runs very well but it revs hard above 55 Mph.

    As I use it daily any help would be very much appreciated.

    Kind regards
    Bernard (UK)

  2. #2
    Senior Member
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    Mar 2007
    Location
    So. Cal
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    108

    5 spd trans

    Im guessing the G54 or G52 series would fit to your jeep. Take the back plate and see if the holes matched.

  3. #3
    Senior Member
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    Tranny

    Hey, show some pix of your rig those things are rare I remember my
    classmates Dad used to have one.

  4. #4
    Senior Member
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    Feb 2008
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    scappoose, or
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    754
    gonna have to find a narrow 5 speed box. Since the g5 series didnt go wide until 83 or so. A 5 speed from a 80s 4g63 truck should work.

  5. #5
    Junior Member
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    Tewkesbury UK
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    Many thanks for the comments and advice.

    I'll post some pics.

    meantime I have come across this guy who has offered to help find the componeents I'm after www.owens-export.com

    He can be contacted on stevek@owens-export.com

    I'll keep you posted on how this comes together.

    Bernard
    UK

  6. #6
    Junior Member
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    Here are a couple of pics of my little truck:

    IMG]http://i209.photobucket.com/albums/bb77/Invicta_photo/100_0476.jpg[/IMG]

    IMG]http://i209.photobucket.com/albums/bb77/Invicta_photo/100_0476.jpg[/IMG]

  7. #7
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    Hamilton New Zealand
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  8. #8
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    Tewkesbury UK
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    I decided to go for a unit made by Herm Tilford who is based in the USA - you can find him on the web under Herm The Overdrive Guy.

    I've been running with one of Herm's overdrive for 9 months now and can thoroughly recommend it. The only slight problem is it tends to pop out when not in overdrive when I'm reversing but thats probably more down to wear in my gear box.

    Bernard

  9. #9
    Senior Member
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    Feb 2008
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    scappoose, or
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    754
    Sounds more like bearing wear if it's popping out of gear.

    Have any pics of the od setup?

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