Best way to get old diff fluid out?
Thread Starter
Instructor
Joined: Aug 2003
Posts: 111
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From: South-western Ontario
Best way to get old diff fluid out?
What's the best way to get the fluid out? When I tried this past summer I used a turkey baster with a rubber hose attached to the end to try and remove the old stuff out! 
Didn't get too much out as the oil was clogging the rubber hose! I read some of the posts before to use a hand pump. What brand or model of pump are you guys using? I've looked at the online catalogs and can't find anything that would fit this purpose? If I went to a place like NAPA what would I ask for?
Didn't get too much out as the oil was clogging the rubber hose! I read some of the posts before to use a hand pump. What brand or model of pump are you guys using? I've looked at the online catalogs and can't find anything that would fit this purpose? If I went to a place like NAPA what would I ask for?
Melting Slicks
Joined: Jan 2004
Posts: 2,527
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From: St. Petersburg, Fl///Columbus, Ohio
I use a suction pump.... It kinda looks like a grease gun with a rubber hose hose on it .... works great for drawing the old fluid out and pumping the new fluid in!!!
Thread Starter
Instructor
Joined: Aug 2003
Posts: 111
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From: South-western Ontario
Originally Posted by jcswm
I use a suction pump.... It kinda looks like a grease gun with a rubber hose hose on it .... works great for drawing the old fluid out and pumping the new fluid in!!!
Pro
Joined: Jan 2004
Posts: 653
Likes: 56
From: TX
Sta-Lube makes a pump under their name or under private labels and are commonly available in many auto parts stores - it's just a cheap plastic pump w/ a couple of clear plastic tubes included.
For filling or pumping new back in - the pump is a little big to fit in most brands of gear lube - it fits in their brands of course. If you choose another brand may have to dump it into another container or cut the top off or something if you choose to use the pump.
Sta-lube is now owned by CRCIndustries.com.
For filling or pumping new back in - the pump is a little big to fit in most brands of gear lube - it fits in their brands of course. If you choose another brand may have to dump it into another container or cut the top off or something if you choose to use the pump.
Sta-lube is now owned by CRCIndustries.com.
Instructor
Joined: Aug 2003
Posts: 147
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From: Augusta GA
Dope Removal
I used my shop vacuum cleaner,tygon tubing from Lowes and a gallon jar.Drilled two holes in jar lid for tubing {snug fit}.Cut tubing into one 3 foot piece and put one end into jar lid about 2 inches and the other end into the differential.Put one end of the remaining tubing into the jar lid and the other end into a shop vac hose and tape tubing to hose.Start vacuum and slide under car to hold tubing at bottom of differential.You won't believe how fast you will drain your differential and you can inspect the fluid if its in a jar.
Le Mans Master
Joined: Mar 2004
Posts: 7,502
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From: Little Rock AR
Originally Posted by bs82vette
I used my shop vacuum cleaner,tygon tubing from Lowes and a gallon jar.Drilled two holes in jar lid for tubing {snug fit}.Cut tubing into one 3 foot piece and put one end into jar lid about 2 inches and the other end into the differential.Put one end of the remaining tubing into the jar lid and the other end into a shop vac hose and tape tubing to hose.Start vacuum and slide under car to hold tubing at bottom of differential.You won't believe how fast you will drain your differential and you can inspect the fluid if its in a jar.
-Mark.
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Verdad Gallardo
Senior Member since 1492
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Originally Posted by jcswm
I use a suction pump.... It kinda looks like a grease gun with a rubber hose hose on it .... works great for drawing the old fluid out and pumping the new fluid in!!!
$9.00 from J.C.Whitney.
Jughade allways has the best Ides 
Safety Car
Joined: Oct 2004
Posts: 3,725
Likes: 5
From: Minnesota
Just tighten up one of the rear leaf spring bolts until you break the ear on the differential cover. While you're replacing it the fluid comes out real nice 
. You probably always wanted a fancy new heavy duty cover anyway. 
. You probably always wanted a fancy new heavy duty cover anyway.
Pro
Joined: Mar 2004
Posts: 584
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From: Okemos MI
Originally Posted by gtr1999
I drill and tap a drain plug in the housing. I know it doesn't help you now, but something to think about if you drop the rear end for any service work.
Gary
Gary
Drilled in lowest area taped pipe threads and put in drain plug. I even put a small super strong magnet next to the drain.
I used it again today! easy as changing the engine oil.
or you can buy a 68-79 drain plug kit from Corvette Central (page 161) with a drill bit pipe plug tap (very important) drain plug and template PN / 582267 for $59.80
Last edited by Lotus76; Nov 26, 2004 at 11:42 PM.
Pro
Joined: Jan 2004
Posts: 653
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From: TX
Originally Posted by Lotus76
Thats what I did
Drilled in lowest area taped threads and put in drain plug. I used it again today! easy as changing the engine oil.
I believe I have seen a kit with a templete in one of the Corvette Catalogs
Drilled in lowest area taped threads and put in drain plug. I used it again today! easy as changing the engine oil.
I believe I have seen a kit with a templete in one of the Corvette Catalogs
