[6pack] Nissan Differential

[Dwayne Cooper]

I've been thinking about going with the Goodparts differential upgrade and
have been looking around for a diff to use.  I found one on ebay which seems
to fit the specs as described on the Goodparts site.  Here's the link:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=140363277667&vi
ewitem=&sspagename=STRK%3AMEWAX%3AIT

In looking at the picture, it has a piece of tubing coming out of the top that
I haven't seen on other diffs.  Does anyone know what this tube is for?

Thanks,

Dwayne
'74 TR6

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