rear end fluid change
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
There is no drain plug.
Only way to get oil out is by cracking the diff head loose.
Much work , have to remove bolts from C beam to loosen head
There is a mod some people do by drilling through one of the bottom bolt holes in the bat wing ( which are blind tapped ) so as to allow the oil to be drained there. Bolt then becomes the drain plug soto speak
Only way to get oil out is by cracking the diff head loose.
Much work , have to remove bolts from C beam to loosen head
There is a mod some people do by drilling through one of the bottom bolt holes in the bat wing ( which are blind tapped ) so as to allow the oil to be drained there. Bolt then becomes the drain plug soto speak
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
I've never tried this but maybe stick a small soft tube in the fill hole and suck most of it out....then add new (posi approved) oil 'till it runs out of the drain hole.
Do not rotate the tires or driveshaft with the siphon tube in the differential.
Do not rotate the tires or driveshaft with the siphon tube in the differential.
Instructor
Joined: Oct 2004
Posts: 208
Likes: 1
From: Santa Rosa CA
Melting Slicks
Joined: Jun 2002
Posts: 2,705
Likes: 30
From: Chesapeake Beach Maryland
2015 C5 of Year Finalist
I used a rotary peristaltic hand pump in the vent to remove my diff fluid. It worked great. According to what I measured coming out, I pratically removed all the fluid that should have been in there.
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
Vent looks similar to this:
http://www.mamotorworks.com/opener.htm?614307+614307
I'm trying to find a photo of location....
http://www.mamotorworks.com/opener.htm?614307+614307
I'm trying to find a photo of location....
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
My helms does not have a blow up of the differential only the differential's carrier....the vent is not on the carrier according to the pics/parts list page.....must be on the differential....feel around the top and or between the webbing.
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Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
Safety Car
Joined: Jul 2004
Posts: 3,845
Likes: 30
...i've an 88 and did this a few weeks ago.......there is (on my 88) a fill hole on the passenser side of the gearbox...go to advance auto parts and buy the small red hand pump they have (approx $13.00)..remove the plug in the gearbox and insert the hose and use the pump untill the gearbox is as empty as you can get it.....then, take your limited slip additive and your gear oil and reverse the proceedure (and the hoses) until the oil starts to drip out of the hole...replace the plug and your'e done.....
Team Owner
Joined: Jun 2001
Posts: 26,196
Likes: 0
From: Orlando FL
St. Jude Donor '08-'09
Should something like this be done every so often? I am pushing 130K miles on mine.
I just found out last year I was supposed to change the fluid in my ZF6 every so often... i had never done it up until about 125K miles later
I just found out last year I was supposed to change the fluid in my ZF6 every so often... i had never done it up until about 125K miles later
Safety Car
Joined: Jul 2004
Posts: 3,845
Likes: 30
.....i would change it out every 20k miles or so......what does the owners manual say?.....
