Third gear not working - found this in tranny

[WilsBoar]

So, third gear was not working, took it apart and look what we found in the bottom of the tranny.

Probably not good eh? Does it make more sense (cost) to fix this tranny or find another to drop in. Preferably something fully synchro'd.

What do you all think?

Derek

[o2batsea]

Year?

[I Leak Oil]

Well, they're easy enough to rebuild. The risk you take putting in another used one is you may have the same issue or worse unless you know for sure it's good. That is the hard part with used units. I'd rebuild.

[rdsrover]

I would re-build or replace with brand new. It's hard to imagine a transmission being the only good thing left on a scrapped vehicle.

[WilsBoar]

Its my 1969 109. I would rather rebuild than inherit someone else's issue. What is this part anyway? I am looking at the schematic and it looks like several parts. What is a rebuild going to cost me if I pull it out of truck myself?

[WilsBoar]

Ileakoil, have your ever rebuilt one of these? I am game for trying, especially if you feel it isn't terribly difficult. Its already almost out of the truck anyway.

[Momo]

These gearboxes are really simple. Basically you have the shift fork assemblies and the gearsets and some bearings and that's it. You could rebuild it in a few hours on the garage floor. Take it apart and inspect everything for wear, order what you need, and put it back together. Take some photos along the way for reference and ask some questions here when you get stuck.

[I Leak Oil]

I've rebuilt a couple for my own use. Really isn't a bad job at all if you're mechcanically inclined, and more importanty, willing.

[WilsBoar]

Anyone have an idea what this chewed up part is and if there should be some additional pieces in my tranny sump?

[westcoastkevin]

I have an earlier gearbox that might have some differences but it looks a bit like the remains of the rear layshaft bearing.

What diameter are the roller looking things?
Approximately what diameter is the ring?
Are the ring segments steel or bronze?

The rebuild is not hard but you will need to get some puller sets to get it stripped. You may need access to a hydraulic press too. Keep all of your old bearings. You might need the races for driving in the new ones. You will need some brass drifts too.

Kevin