RE: cleaning out the diff grease on cen gst???
Forevernitro, A recommended upgrade to the GST is putting a nemesis diiferential as described [link=http://www.rcuniverse.com/forum/m_5643394/mpage_1/key_/tm.htm]Here.[/link] Read the whole thread becuase I placed a couple links in post #27 to upgrade even the Nemesis diffs to Heavy Duty Outdrive cupd and CVD's!! Its all there....
Hope this helps!! Have fun!!