Hi, I'm hoping someone might be able to advise on this.
I'm in the process of fixing my daughters '92 cabby (auto) - speedo wasn't working and on investigation I discovered the plastic gear that goes into the trans had a couple of broken teeth.
Replaced the gear but no joy. When not installed I can spin the gear by hand and get a reading on the speedo, but when installed into the auto tranny I get nothing. Have made sure the thing is fully installed/pushed all the way down.
Now I'm worried something more major is broken. What's next? Pull the tranny? (yikes! Not unless I'm swapping in a better drivetrain)

I haven't got a repair manual yet - any recommendations?

Thanks