sm420 question

Discussion in '40- & 55-Series Tech' started by mlflynt, Jul 14, 2003.

  1. mlflynt

    mlflynt

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    Jul 14, 2003
    Location:
    Granite Bay, California
    Installed a kit in a sm420,syncro's,bearings,seals,etc.. Shifts smoothly 1st thru 3rd, pops out of 4th. could it be worn 3rd 4th shift fork, worn 3rd 4th speed clutch key/springs? Are 3rd 4th speed clutches interchangable thru all years?Getting ready for Sierra Trek, need some ideas.
     
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