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Thread: amc 401 flywheel ring gear question

  1. #1
    Bulltear forum member Cook
    Join Date
    Jun 2014
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    amc 401 flywheel ring gear question

    my ring gear and powermaster starter killed each other,the ring gear I had on it was 164 tooth and the powermaster has a 9 tooth gear,from all the research I did it should have worked out,
    this is the one that ate my ring gear

    https://www.jegs.com/i/Powermaster/7...RoCXwQQAvD_BwE

    and this is the new one on the way

    https://www.summitracing.com/parts/p...xoCi-IQAvD_BwE

    havent ordered the new ring gear yet,trying to figure out if my ring gear was the problem.

    no I did not use spacers,bellhousing is from a early cj,since im using an np435 4 speed,401 came out of a 1976 cheeroke cheif.
    Last edited by SHIFTY; 03-06-2024 at 07:04 PM.

  2. #2
    Thank you from BT ULTIMUS MAXIMUS STATUS tufcj's Avatar
    Join Date
    Apr 2004
    Location
    Watkins, CO
    Posts
    2,864
    I seem to remember some older powermaster starters were shipped with the wrong gear for AMCs. It might be worth a call to powermaster. Did you keep the plate between the block and bellhousing? It has to be there to get the starter depth right. When you replace the ring gear, put the flywheel in the freezer overnight, then put the ring gear in the oven for a while, the gear will drop on and tighten as temps equalize.

    Bob
    tufcj
    1969 AMX
    1967 Rambler Rogue

    If you need a tool and don't buy it...
    you'll eventually pay for it...
    and not have it.
    Henry Ford

  3. #3
    Thank you from BT ULTIMUS MAXIMUS STATUS tufcj's Avatar
    Join Date
    Apr 2004
    Location
    Watkins, CO
    Posts
    2,864
    I seem to remember some older powermaster starters were shipped with the wrong gear for AMCs. It might be worth a call to powermaster. Did you keep the plate between the block and bellhousing? It has to be there to get the starter depth right. When you replace the ring gear, put the flywheel in the freezer overnight, then put the ring gear in the oven for a while, the gear will drop on and tighten as temps equalize.

    Bob
    tufcj
    1969 AMX
    1967 Rambler Rogue

    If you need a tool and don't buy it...
    you'll eventually pay for it...
    and not have it.
    Henry Ford

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