Only a problem if it's leaking. Best sealant is anerobic, in this use the RTV will leak (eventually). Just keep an eye on it and fix it next time you have it out for something else (like a clutch job). It's a bit of work to fix it, not worth pulling the trans unless its a truly massive leak. If the ATF was not leaking bad, 90 wt will leak less. Using ATF in a manual is pretty common now, but NEVER in something with a differential in it. Probably the best for this applications is RedLine 75-90NS, not Redline MTL (MTL is NOT recommended for differentials). Since your transaxle has a differential in it you have to keep that in mind. Redline's naming convention is a little wierd, "NS" implies that it is intended for non-limited-slip applications, not the other way around. I even called them to make sure. Dave --- In dmcnews@xxxxxxxxxxxxxxx, Samuel <samuel_yahoo@xxxx> wrote: > While I was doing other work on my car, it was noticed that I have black > silicone sealant on the bottom seam of the transmission. Should I worry? > I know my manual trans had automatic fluid in it instead of gear oil > also. Wanted to get the opinion of the community. > > Samuel 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/