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Another weak 544

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I just acquired a 544. Drove it 15 miles home and by the time we got there it barely would climb a hill in low range. The oil pressure is right at the mark at high idle, the oil temp warmed up to right where it should be. If the converter is slipping that much I would expect to see the trany fluid getting hot. It never budged beyond normal. The unit had better speed before the unit warmed up.

At low idle the trany pressure drops down to the black mark on the gauge, again I assume normal. Have not put any gauges on it yet.

I put in low viscosity oil meeting the original C2 spec, but wonder if a slightly heavier oil might have been a better choice.

Ideas fellers?

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