Hello,<br>I have a '99 v70xc that I am replacing the engine in and while it is out am replacing seals and making improvements on the weak spots. I know that the angle gear is prone to failure and have read that it is often due to seals failing due to clogged vent -> leaks -> running dry.<p>I have read tech bulletin 46-08 (attached at <A HREF="http://www.v70xc.com/forums/showthread.php?s=0b9e09a12bd80e35c44528bbe867d1dd&t=13573" TARGET="_blank">http://www.v70xc.com/forums/sh...13573</A>) which details adding a new larger brass tube w/ a filter to prevent the vent from becoming clogged. The bulletin applies to my year, but my angle gear has only a very small vent at the space indicated on the pictures, and is not large enough to install the brass tube (which I have purchased, along w/ the filter). Should I, or can I, just drill this out to install the larger tube? Any tips on preventing metal filings from contaminating the angle gear?<p>Also, can the angle gear be flushed? Gear oil is pretty thick stuff as I understand it, is there a reliable way to clean it out? I noticed there is some dirt in mine already.<p>Thanks!