CanuckS#69
Member
All of the above. The drive unit is the chunk of complexity inside the rear subframe once disconnected from the suspension. This includes the transmission (such as it is), electric motor, and inverter. The electric whine noise comes from the inverter, but I'm not certain whether the highway speed noise is coming from the motor or the inverter. The recent factory drive units apparently are a new revision, perhaps to combat this issue.
The design on the drive units is really quite interesting. The entire assembly can be dropped out of the car and replaced in about an hour, so replacement is cheaper than diagnosis with the take off part going back to the factory for analysis.
The design on the drive units is really quite interesting. The entire assembly can be dropped out of the car and replaced in about an hour, so replacement is cheaper than diagnosis with the take off part going back to the factory for analysis.