Melted Speedo Drive Gear (in Tranny)

[dbdan]

Hi all. I've got an 84 190D with a speedo that has never worked. I read the different posts and tech threads on how to replace the gears in the instrument cluster or replace the cable.

I pulled the cluster and dissasembled it and everything looked fine. I then checked the cable by putting my drill on it and it checked out ok. I should have checked this first!

I then started the car and looked up in the transmission tailhousing and could see that the plastic rod that accepts the speedo cable wasn't turning. I finally got around to pulling it apart and this is what I found.





Both drive gears are fried. Anyone ever run into this before and know what would cause it?

There is a tube that directs ATF up over the top of the larger gear. I'm thinking this is plugged???? Any way to check it?

Once I get the parts and re-assemble, I'll post the rest of the pics in a tech. I couldn't find any other posts with this info.

I will also recommend people check the speedo cable before pulling the cluster!!!

Thanks.

Dan