It is a pipe thread which means it tapers so it gets tighter as you screw into it. Try a new drain plug with a magnet and wrap it with teflon tape. If that doesn't work you wil have to find a metric pipe thread insert, I am sure that someone makes it, I have never seen it. You "could" use an english thread insert, those I have seen. It would mean using an english plug and remembering to NEVER mix up the drain and level plugs. It is rare for that to leak. Inspect it closely for a crack, that is more likely. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "Dave Swingle" <swingle@xxxx> wrote: > > > Has anyone ever heli-coiled the drain plug on a manual trans? Any > idea what size it is? Last time I change my gear oil I noticed that > it was starting to strip, and over time it's started leaking a > little. Changing to synthetic gear oil has made it leak more. > > Dave S To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/