| [GMCnet] New bees and others on the Final Drive lube [message #316460] |
Sat, 22 April 2017 15:15  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma:
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Senior Member |
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I very seldom hear that owns have changed the FD lube. I change mine every 30,000 miles. That comes out to every other trans fluid/ filter change. Oils cheep. After getting the trans in Barb's 73 GMC. I pulled the FD cover off at the end of the day so it could drip all night. And that it did. The gear lube came out like maple syrup on a 10 degree Winter day in Iowa. 14 hours later. Still slowly dripping. And way be on black. It had mineral base lube in it. Can't get it all out. So I stayed with it. It did the job for 44 years, and 200,000 miles. No reason to change at this point. Personally. I wouldn't change to synthetic unless you can clean ALL the old lube out for sure. So. When was your FD lube changed? If you change the lube. Check with those here about the special gasket with the vent passages. Then how to find/clean the tiny hole in the cover. You need no mechanical skills to do this task. 1/2" socket or wrench, drain container, spray gasket adhesive, scraper of some kind/ single edge razor blade, a solvent to clean gasket area, and 2 qts of gear lube. Bob Dunahugh
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