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The transmission 1st. gear problem sounds more like a fly wheel pilot bearing or clutch throwout bearing problem to me. Normally it’s a 2nd gear synchronizer problem that Metros have.
However, whichever it may be, would require you to pull the engine or transmission.
But, before doing that. I would try changing the gear oil to Pennzoil Synchromesh transmission fluid before I did anything drastic.
It’s amazing how much it cures - helps.
Metros are getting harder to find, but parts are still readily available.
$600 sounds great if everything else is good.
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