You should consider replacing/upgrade your K-1 spring.
http://www.peachparts.com/shopforum/showthread.php?t=137381

http://www.peachparts.com/shopforum/showthread.php?t=140495

And maybe even the B2 piston:
http://www.peachparts.com/shopforum/showthread.php?p=1048115

http://www.peachparts.com/shopforum/showthread.php?t=131124

I used Mobile 1 synthetic when I changed mine.
You may also want to add some varnish remover like TRANS-X before you dump out the old stuff.

Danny

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1984 300SD Turbo Diesel 150,000 miles

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