[motorcritter]

Without opening it up completely, pulling the pan and looking for excessive debris and noting the fluid condition (clear red, murky brown, 'burnt' smell, just plain old ATF odor) can tell a lot about it. To be sure, drop it off at a reliable transmission shop (someone recommended by a close friend) and get it rebuilt- it won't cost as much as a new reman unit, and you know exactly what you've got. Those transmissions are pretty solid, but not without their weaknesses. A good rebuild can eliminate those shortcomings, and you'll have an overdrive transmission that is totally worth the effort and head and shoulders above a Powerglide- especially one that appears to be on its way out.
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