Since I purchased my TR6, it has had a very squeaky steering wheel! Today I finally pulled off steering wheel and was expecting to tear it down to the bushing. To my amazement I turned the wheel and no squeak. The brush assembly was damaged on end which contacts circle ring, thus I was getting a bad squeal from this. I then lapped the offending end flat and used diamond paste to polish button end. This stopped the squeal and the odd looks from my passengers!