thread from the dead...
Happened to me too. Thank you all for the heads up. I changed my oil and while on the lift I inspected the rear diff. Sure enough, a gear oil sheen was all over the housing above the diff. Took it in to the dealer for warranty work for a new tail light and mentioned the pinion seal leaking. They put one on order.
These aren’t antique/classic cars. The more I learn about the GKN Twinster dual clutch diff, the more I don’t want mine to fail. Our underbody was coated with gear oil. I’m sure the other fails are similar. Doesn’t seem trivial to me and I’m happy people are helpful enough to share their stories so I know where I stand. Not trying to start a peeing match, just not sure about the comparison. C.
^^^^^^^^^^^ Yep.Because parts aren't cheap and these newer cars are typically a DD for people. Add in a slow leak can lead to full failure later on in the car's life... right after the warranty for some.
I also have multiple fun cars, but if they go down for any reason... I can still get to work, get the kids to daycare, etc.
If mine would have just stayed "damp" it wouldn't have been a problem. Unfortunately, damp turned into a dripping leak and I didn't feel like crawling under the car and topping up the rear diff. as part of my regular maintenance, as well as having in the back of my mind complete seal failure every time I drove the car.
Thank you sir, already planned on it as from what I gather, a complete replacement seems to be the answer in many situations. Our diffs must get all been built on a Friday...Remmy, if they are just going to replace the seal, keep an eye on it. They replaced mine and it took about a month for it to start leaking again. Then they replaced the entire rear diff.
I have had a Buick dealer do warranty and recall work on a Chevy.Are you saying that the Chevy Dealer is ordering the part and doing the repair under warranty?
I once spoke with my local Chevy dealer who told me that they could NOT do warranty work on the Buick. They could service, but not warranty work.
Who is right?
Just keep in mind, seeping fluid that only wets the casting is considered OK. Unless there's a consistent 'drip' they may not take any action.Just did an oil change and checked mine, not easy to see in this picture but there is some cast off on the housing. So I will have to plan a visit to the dealer to have them look at it.
Yeah, what JGS said. Ours was pretty noticeable above the diff. If you don’t have a way to get the car up, even drive up on a curb or across a low spot so you can get under the car and see the painted underbody above the diff. If it’s leaking enough to wet the slinger, you will see it above the diff. Good luck.Just did an oil change and checked mine, not easy to see in this picture but there is some cast off on the housing. So I will have to plan a visit to the dealer to have them look at it.
Here to say that the GS is susceptible to the same issue. I just returned home from a road trip(900 miles) and noticed my car left a puddle of fluid on the ground and smells hot. Also it's making a loud humming noise when moving. It will be going in next week for repairs, although it may hurt as it has 88,000 miles and is only covered by an extended warranty. Will post updates once they have diagnosed the problem.