Changing fluid in 9" rear
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Junior User
Joined: Oct 2006
Posts: 55
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Changing fluid in 9" rear
I have a '76 f150 9" rear with 3.89 gears and was wanting to service the fluids in it.
I have never jacked with a rear diff. before and was wondering what the easiest way would be to drain the fluid.
(Since there is no drain plug)
Do I actually have to pull the third member to drain the fluids.
Thanks, Al
I have never jacked with a rear diff. before and was wondering what the easiest way would be to drain the fluid.
(Since there is no drain plug)
Do I actually have to pull the third member to drain the fluids.
Thanks, Al
Fleet Mechanic
Joined: Oct 2003
Posts: 1,371
Likes: 10
From: Green Springs, OH
According to my manual and past experiences it is suck the old fluid out through fill hole with a manual suction pump device or pulling axles out part way then removing the whole third member.
Elder User
Joined: Dec 2002
Posts: 550
Likes: 1
From: Effingham,IL USA
i use my mityvac vaccuum pump to suck out the gear oil on mine. the fill plug hole lets u get in the housing with a small hose and remove the oil. parts stores sell em.they work good for empting brake master cylinders and ps pumps too. the ring gear is in the way if u try to stick anything in the 3rd member, but just jab the hose around till it goes down to the bottom of the housing. i thought about installing a drain plug on mine, but im too lazy anymore,lol.
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Junior User
Joined: Oct 2006
Posts: 55
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Thanks for the input; I was considering the pump idea and thought it would be alot easier
than pulling the third member, but someone had told that a hose would get caught and that I would not be able to get it out if I tried.
This sounded kind of strange to me so I thought I would just ask and confirm.
Thanks for the reasurance; Al
than pulling the third member, but someone had told that a hose would get caught and that I would not be able to get it out if I tried.
This sounded kind of strange to me so I thought I would just ask and confirm.
Thanks for the reasurance; Al
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