Rearend leaking, anyone experience this lately?
Thread Starter
Pro
Joined: Sep 2000
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From: Rocklin CA
Rearend leaking, anyone experience this lately?
I noticed a couple of oil spots under my car on the garage floor last night. Appears to be coming from my rearend, although I can't tell where. Wherever it came from it traveled down to the bottom most bolt on the rear end and then to the ground. It also got on my rear cross member and some of the wiring harness. Washed it off, and will watch it, but I hate to have to bring it in to service if I really don't have to. It is tough to get this monster on the racks, and those guys always getting grease on something. I only have 9,000 miles on my car, and I am real, real easy on it, so i don't quite know why it is having a problem.
Major bummer.
Major bummer.
Le Mans Master
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Re: Rearend leaking, anyone experience this lately? (bwhitmore)
Do a search but I think this is a common problem with a rough (un-finished) surface on one of the differential parts.
Le Mans Master
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From: Maryville TN
St. Jude Donor '06-13,'16-'17, '19
Re: Rearend leaking, anyone experience this lately? (bwhitmore)
Yeah, this problem has been around since 1997! GM just ignores most C5 problems like this.
The C5 diff assembly is a German (Getrag) made piece and I guess GM figures that it's NOT their problem to find a better way to seal these units.
If yours is like most, the left side (drivers side) diff cover is leaking. Your dealer will have to install a new o-ring on the diiff to side cover connection. It took my dealer about 6 hours to fix the leak.
Tom
The C5 diff assembly is a German (Getrag) made piece and I guess GM figures that it's NOT their problem to find a better way to seal these units.
If yours is like most, the left side (drivers side) diff cover is leaking. Your dealer will have to install a new o-ring on the diiff to side cover connection. It took my dealer about 6 hours to fix the leak.
Tom
Le Mans Master
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From: Waldorf MD
Re: Rearend leaking, anyone experience this lately? (JQUEST)
Have you serviced (oil change) the car recently? If so, and they checked and filled differential, they often overfill it and extra blows out. If so, it will stop.
Thread Starter
Pro
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From: Rocklin CA
Re: Rearend leaking, anyone experience this lately? (Tom/99)
Sure enough, it is leaking from the driver's side of the diff. I have not had it serviced recently, and since I tend to do it myself anyway, I haven't topped off the rear diff fluid, so I don;t believe it is overflow.
For those that do add their own diff fluid, and it looks like I should now soon before getting it into the dealer, where do you fill it, and what type of fluid are you using?
For those that do add their own diff fluid, and it looks like I should now soon before getting it into the dealer, where do you fill it, and what type of fluid are you using?
Team Owner
Joined: Sep 1999
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From: Swansea IL
Re: Rearend leaking, anyone experience this lately? (bwhitmore)
Mine was dry before my last dealer service. I called the dealer after noticing the left side looked wet. The tech mentioned that during a GM Goodwrench Plus Oil change they check and top off all the fluids. Seems the diff was over filled. At least he was honest. he said to monitor it for a few weeks and it should stop, if not bring it back for major warranty work.
No drops on the floor so it can't be "LEAKING" too bad. I wiped it clean while it was up on a lift and will monitor.
Tom
USAF Retired
[Modified by AFVETTE, 4:52 PM 6/22/2002]
No drops on the floor so it can't be "LEAKING" too bad. I wiped it clean while it was up on a lift and will monitor.
Tom
USAF Retired
[Modified by AFVETTE, 4:52 PM 6/22/2002]
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Le Mans Master
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Re: Rearend leaking, anyone experience this lately? (AFVETTE)
Very common. Left/Driver side normally. Mine went out at 10k and looks like I need to do it again now at 32k miles. Big O-Ring. Guess I'll change my fluid again too.
Le Mans Master
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From: Ex-SF Bay Area; now happily Denver area
Re: Rearend leaking, anyone experience this lately? (MelloYellow)
Very common. Left/Driver side normally. Mine went out at 10k and looks like I need to do it again now at 32k miles. Big O-Ring. Guess I'll change my fluid again too.
