Shift collar tooth count

[TheSilverBuick]

Is there an external way to tell how many teeth are on the shift collar?

[dirtdobber]

There's no easy way that I know of, unless the number on the case will tell you. I don't know if the teeth are at all visible if you pull the diamond shifter out.....probably not but it may be worth trying. I guess you could also try taking a piece of stiff wire and snake it in through the shifter hole and see if you can feel the teeth well enough to count them.

[TheSilverBuick]

Yeah, I'm not sure about about that, but I may give it a try. The problem with hoping the case numbers will tell the story is my T-20 has clearly been apart at least once, and who knows if it has original drums, and shift collars, in it. I may forgo the gym tonight and make a hard push to get the transmission out and apart tonight.

Hmm, now that I think about it, I have an endoscope that plugs into my phone and I think it came with a 90º mirror attachment, I bet I could stick it down in the hole and have a look? If I can find the attachments.....

[msafi65]

You won't be able to see past the bushing in the ring gear drum to the teeth. 9 tooth t20s are somewhat rare. I have only seen them in early 80s vehicles. Best to just open it up and when it's done it's ready for a lot of years.

[TheSilverBuick]

Well my luck it's the 9 tooth one, and there are some cheap 18 tooth ones on Ebay right now. The wore out one on the right is the broken one. The drum's teeth look just a bit worn but nothing like the collar.

[dirtdobber]

That one on the right looks like an 18 tooth collar with every other tooth ground off.

[TheSilverBuick]

Oooh, that would make a bunch of sense!

[JoeMeg]

That one on the right looks like an 18 tooth collar with every other tooth ground off.

Yes, it does. Good observation!