Its a bit scabby but after an email before i bought it, jack at royal steering wheels said he could recover it for £25, and recover it he did! So after owning three E30 M3's in the past i sort of miss them and I've always liked the gearknob, think its much better than the current ones BMW offer, so I set about a challenge of fitting one (and finding one, they are obsolete from bmw now), so i managed to find one after trawling ebay and came accross and bought this (six years ago now mind for the E46) The non-illuminated dry CF M Performance knob from the F22 is listed as 205 grams.Į30 M3 gearknob is what you want ,what I fitted to mine last yearĪ bit of E30 M3 lives on again! I made a short gear lever, I've always hated the oem M2 gearknob so i used my ol' E30 gearknob, It's been a family heirloom for centuries now and has been carefully passed down through generation to generation of M3! Real OEM lists the stock knob as 231 grams, and the illuminated M Performance knob as 297 grams. Using anything heavier than this would be the equivalent of driving with your hand resting on the shift knob." However, as we began adding more weight to the shift knob area, we did find that when the mass increased to 8 oz., the gap began to close. We have analyzed the additional mass of the Rogue Engineering shift knobs (approximately 6 oz.) and have found that they're additional mass was not enough to close the 0.004"-0.006" gap. (approximately 100 grams), the factory shift knob is relatively light, in comparison with the available aftermarket knobs. Premature wear of the gear or shifter rail may hamper transmission shifting performance, gear engagement, or worse.Ī recent popular fix for short shifter notchiness is the use of an excessively heavy, metallic shift knob. When you make a 0.001" change at the shift knob and maintain pressure (like resting your hand on the shift knob while driving), the required 0.004"-0.006" gap is closed, preventing the lubricant to ride between the gear and shifter rail.
This gap allows for the transmission lubricant to acts as a barrier so that the shifter rail and gear are not directly touching, causing premature wearing of the gear (not syncros), shifter rail, or both. "Within the transmission itself, BMW has a specification of 0.004"-0.006" gap between each gear and the shifter rail in the transmission (for reference, a human hair is approximately 0.0035"). If choosing a new knob thats aftermarket, make sure its not >200g
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