3rd Gear Synchro

[RattleTrap]

I've spent the last 3 or 4 days taking my transmission out because I needed to replace my rear main seal. Since the transmission's out, I want to replace a little 3rd gear grind I have when shifting. I'm pretty confident it's a problem with the synchro…what other parts would might I need for this job? Is there anything I should know before I try taking things apart? I've never done any transmission work before, so any help will be appreciated. Thanks!

[BEEK]

replace the shift sleeve and check the fork for wear. I would also check and replace the syncros on the other 3 gears, you can flip 5th gear syncro if that has not been done already

[vandor]

You will need a gasket/seal set. I would also replace the synchro springs, they do break every now and then. When it happens the synchro can't work at all. Replace shift forks if they show any wear. Check and replace if necessary all gears and sliders.

[RattleTrap]

Now that I've got the synchros out, I can see why 3rd gear was grinding I think. I assume it's because its inner teeth are bent out like they are. In the second picture I put the 3rd synchro ring on the right and one of the other three on the left.

My question is: how did this happen? Is it just normal wear? I'm not too excited about spending more money on parts, but if there's something in there that could damage the new one like this, I might as well replace it.

[BEEK]

take a picture of the 3rd gear where the sycro goes, i want to look at the condition of the teeth, also the shift hub, and the same mating teeth

[RattleTrap]

New synchro already installed.



So that's what the grinding was doing….

[BEEK]

by the picture, i would probably reuse the 3rd gear, and definatly replace the shift slider (hub).

this is not normal wear to have caused the syncro to look the way it does. i have seen that a time or 2 before but i cannot say how that happened. i would speculate that the syncro damage was from forcing the transmission into gear