I dropped my tranny pan today to change the fluid and filter, and look what was laying in the pan:





I understand it's a broken piston from reading some of the info on this site, but which one? B2? Also, after I filled the tranny back up with fluid just 1/2 hour ago I drove it around and I don't notice a single symptom of a malfunction. It's getting all 4 gears and reverse just fine. I don't understand how that can be with a broken piston.

The only strange thing I've had going on lately is a 6-8 second delay engaging into gear on very cold mornings. But even then once out on the road it shifted fine.

What should I do about the broken piston? Just order a new one and pop it in? Again how can I tell which one to order?

Thanks in advance for any advice you can offer.

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'81 300CD - 180K, cannot be killed by any conventional means
'99 Ford Escort - good MPG