Good morning, New guy here. Looking for some advice on fixing a leak at the front of my NWC T5 tranny. Looking at the front of the tranny, at the 4:00 position from the input shaft there's a small plug pressed into the case. Mine seems to be leaking, and I see nothing about replacement of it in the manual. It appears to be the same size as the plug at the front end of the top cover at the end of the shifter shaft and I actually have one from a rebuild kit. How do I get it out and replace it? Thanks a bunch.
That looks like the Welsh plug for the 5th / reverse shift rail in the case. It doesn't need to be removed during a rebuild, but as you see it's a good idea. If the trans is out on the bench you might get it out with the trans together.
That would be great if I could avoid opening up the case. Perhaps drill a small hole in the plug and pry it out, clean up the hole, replace the plug using a little Indian Head sealant and flatten it with a punch to expand it in the hole? (typical Welch plug install)
I'd be very careful when drilling. Use a magnet on the bit and tip it up so any shavings fall down and not into the trans. Should be able to do it without cracking it open.
Just put a bit of grease on the drill bit and go slow. The shift rail should prevent anything getting into the case. Just clean things up after the plug is out and seal the new plug.
I have had problems on other transmissions and I got into the habit of putting some silicon on that plug just before I mate it up the bellhousing, they have never leaked since I have been doing that and that would be about 55 years
I would probably clean it real well with brake clean and put black rtv on it. Probably need to remove the bearing support to get it all. Kinda looks like it's been out before. Either way even if you put a new one in I'd put rtv around it.
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