it might seem that way, but i had two other detent plugs/springs/balls. one of them was an early version that used a plug not a ball. side by side, they were all the same height.
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when i get home, i am going to check the reverse plunger itself. maybe ... just maybe its spun 180 degrees out.
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what i see right now is this. if i look into the reverse selector detent plug hole at the vertical plunger i can see a slotted notch that the ball sits against. when the plug is installed, the ball sits into this notch and prevents easy movement of the plunger. i believe that the ball is so tight against the notch that i can't compress the ball and spring using the shifter. if i remove some of the pressure, the ball can be pushed out and the shifter works fine. there is a small pin that aligns the plunger so it's hard to believe the plunger is installed 180 degres out. i will check it anyway to make sure.
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i did consider modifying the spring but after seeing 2 other plug configurations the same, i am sure there is something wrong.