The clip fell due to vibration....you have "wear and tear"...a re-newal of bushings may be in order.....still far cheaper than replacing the reverse gearset...
When mine lost reverse gear i needed a new linkage and rear engine mount. Mine constantly jumped out the moment the clutch was released. Since changing those parts i've not had any trouble since.
Did you ever resolve this? Just got a 95 and all it does when going in reverse i let out the clutch and grinds.
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