Draining differential oil
Thread Starter
Racer
Joined: Feb 2013
Posts: 364
Likes: 39
From: Sebastian FL
Draining differential oil
Several threads talked about messy procedures to drain the differential oil. I used about three foot length of 1/4 inch ID hose and made a simple siphon. Closed one end of the hose and filled it with oil. Placed the other end in bottom of the differential and put the closed end over a container lower than the differential. Opened this end and the oil slowly drained out.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Yep. That's how a siphon works. With warmed diffy oil (drive it before you drain it), that wouldn't take too long....but a larger line would be better (as big as will fit thru that fill-plug hole). With cold oil and a 1/4" line, I'm not sure all of the oil would make it out. [Lots of surface tension with thick, cold gear lube.]
Thread Starter
Racer
Joined: Feb 2013
Posts: 364
Likes: 39
From: Sebastian FL
Drain
Yep. That's how a siphon works. With warmed diffy oil (drive it before you drain it), that wouldn't take too long....but a larger line would be better (as big as will fit thru that fill-plug hole). With cold oil and a 1/4" line, I'm not sure all of the oil would make it out. [Lots of surface tension with thick, cold gear lube.]
Le Mans Master
Joined: Jun 2006
Posts: 6,400
Likes: 1,226
From: Tampa Florida
I add the new additive after the first new quart of fluid is put in.
Burning Brakes
Joined: Sep 2005
Posts: 1,050
Likes: 205
From: Lewes Delaware
I warm the bottle in the sun or a hot pan of water and hold it above the level of the differential. Gravity does most of the work with a few squeezes of huge bottle needed.
Fran
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Instructor
Joined: Jul 2014
Posts: 163
Likes: 2
I just went to pep boys and spent 10.00 on a suction pump. they are back there by the grease guns. had very little mess removing and installing the the fluids with the same pump. I cleaned it out real good in between removal and refill. it was simple and worth the ten bucks
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
They would be if they dropped the unit and pulled the cover. Every single one I have opened up was full of shavings and debris to varying degrees. I cleaned my 72 out thoroughly with mineral spirits, blew it out and and refilled with Amsoil 80W-90. Ran it many years and dropped it to install a date correct unit. Oil looked new with no fillings. Sold me on synthetic gear lube.