Tim,

I did this modification after the replacement SADS I put in failed. The first set I replaced only lasted 10-15k and I did make sure to align everything. I was not getting any vibration. The aftermarket SADS that are made from alloy and have rubber inserts are most likely just low quality and not made to last. The BMW SADS are almost all rubber with metal sleeves formed into them. As the instruction states you have to cut some steel brakeline to use as sleeves over the Toyota bolts to take up the internal diameter space on the BMW SADS. The BMW SADS are also a little thicker, so I had to muscle the shaft into place. I like the BMW SADS better so far. I was under the van replacing the transmission and checked in on them. They seem to be holding up fine. Also they are easy to get and much less expensive than the Toyota SADS couplers.

Best regards,

Blake