At the diff you have a venting valve, misfunction causes overpressure and this can be the reason for leaking seals.nscrbug said:Ernest...I thought the "vent tube issue" was related to the contaminated auto tranny? Or is there another vent tube problem related to the rear diff that I'm not aware of?
That's a typical GM fix for a RWD differential with problems. They don't trust dealer techs to fix gears (and I don't blame them!) so they just swap out the whole pumpkin.espresso_jim said:
This is the same differential as the Cadillac CTS/CTS-V. On the CTS-V the diff has been a nightmare, split cases. leaks, you name it. Should be OK on the SKY as its not dealing with 4000lbs and 400 horses. Vent tube leak is common. There has been some overfilling at the factory and when the diff gets hot, it may come out.GMinTheDriveway said:
lasstss; Sad to say that your comment "Should be OK on the Sky" is proving not to be true. Perhaps I should say it is not true as far as the Solstice goes. Many Solstice owners know the service drill all to well. The problem starts out as a "bad smell" or wet spot on the ground under the car. It then goes to a vent tube or pinion seal replacement and most times both. The wet spot on the ground reappears in many cases and sometines the pinnion seal is changed again. In some cases the "whine" begins and it becomes louder and louder until the carrier is replaced. In some cases the carrier is replaced again and one Solstice owner is on his third rear carrier.:banghead: There is a problem here that not all owners have been troubled with, but it seems to be pretty widespread. I think it will show itself here as new Sky owners put more miles on their new car.lasstss said:
:agree:Chip said:
C20LET_50 said::agree:
The problem isn't solved up to now and I think there will be no difference between Sol and the Sky at same miles. There is a spread in qualitity of the diffs, if the problem is to big they change and hope to get a better one. If not change again and again and .....
In Germany we call that procedure "Making quality by assorting" It's an expensive way of Quality management.
I fear we'll get a bigger problem with the GXP/RL/GT because of the higher torque and the same diff used. :banghead:
We need to be very careful about calling the carrier flawed. For all we know the application may be flawed. If the design geometry or the units alignment within the chassis is off it could cause the same problem. It is just not known (by us) yet. If GM knows they aren't saying.(yet) I don't think there is any real mileage threashold for this issue. Many with less than 5K have experienced the leaking issue. One thing to be concerned about is the lube loss out of the carrier. I suspect that the unit is getting so hot that it has created thermal expansion that forces the lube out of the unit regardles of whether it was filled to the proper level or not. This replacement of seals and relief vents is only treating the symtom and not the "root cause". Sad to say it may be the best that GM can do at this time.TOY4TWO said:
