I think my tranny is going downhill...

What are the tell-tale signs.

Rebuild or find donor? Discuss.

Thanks

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'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09