Momo uses three small pointed set screws to affix the knob to the shaft. I use a Momo shift knob to replace the BMW OE knob, even on new a BMW, because the knob breaks and slips off eventually. There are aftermarket knobs that solve the problem. Again, the only correct repair is to replace the knob with new original equipment BMW knob. This type of repair ruins the original intended design of the knob fitment.
Non-professional repairs, which the subject of this thread is about, some dumbass uses an adhesive to affix the old broken knob to the shift lever shaft. The only non-damaging repair is to replace the shift knob with a new OE BMW shift knob.
#SNAP ON SHIFT KNOB MANUAL#
It is a classic issue with BMW manual transmissions, because the plastic block eventually starts to break away from the top of inside of the knob's cylinder. Over time and use, the plastic degrades and eventually the knob becomes loose and can pop off the shaft when shifting from 1st to 2nd, or 3rd to 4th. Snap On: Color: Black: Diameter: 45.5 mm: Grade Type: Standard: Illuminated: No: Illumination Color. The fit between the slot in the shaft and the block in the knob cylinder is known as an interference fit, where the block slightly deforms as it is snapped into the slot. This automatic transmission shift lever knob is designed to match the fit and function of the original control knob on specified vehicles, and is engineered for durability and reliable performance. There is a slot milled into the top of the shaft that fits an internal block molded into the top of the interior of the shift knob cylinder. So all BMW manual transmission shift knobs snap onto the gearshift shaft. I know I'm a bit late with this response, but I thought I can help. If I wanted to reattach it, what would be the best way to go about it without ending up with a glued-on knob? The original knob matches the tan leather interior perfectly. I ended up getting a replacement knob, and when I went to take off the original, the plastic retaining ring all just about disintegrated. The shifter on my Z4 started becoming a little loose.
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