
Hi Guys. The removal of an original knob on a lift up reverse 6 speed is relatively easy. Use an adjustable spanner and place it underneath the actual gear knob leaving a gap around the 'lift up' part. Use a hammer/mallet to GENTLY force the knob of the metal spline. Have someone with you to catch the spring which ensures that the lift up section returns to its normal place. After a short while the knob will come off. For replacement, just the reverse but ensure to cover the new/replacement knob with several layers of cloth before you gently tap it back on. Do not let it go down too far on the spline otherwise the lift up will not work correctly.
For replacement knobs, I bought three on ebay including the Momo one and none of them give sufficient clearance to enable the lift up reverse to return to the original position. A Momo one was okish but you had to pull the reverse down manually to get it back to its original position. On the MOT, the guy said that he would fail the car if I did not replace it. I bought a new knob from the local stealers for £77.00. Should have gone to Alfa Aid in Surrey who seem to be able to supply parts at much more reasonable prices. I did buy a new centre console arm rest from them for £33.00 which is very reasonable and the gear knob and centre arm rest combined now make the interior look fabulous. Almost looks brand new. Definately worth spending the century or so that it cost. Hope this helps.