Worn Gearbox Input Shaft Bearings Cars affected: Mainly Evo 5/6, possibly other models Symptom: A whine from the transmission that rises steadily with road speed. It may be difficult to hear below 30mph-40mph. The noise will persist no matter what gear you are in (or neutral) or whether the clutch is depressed or not. It will usually appear after the car has covered between 18,000 to 26,000 miles but possibly earlier. Problem and cure: There have been numerous cases of gearbox bearings wearing prematurely. This is due to the preload on the Input Shaft being incorrectly set in the factory which leads to extra stress on the bearings and eventually failure due to wear. This only seems to be a problem on some Evo 6 gearboxes. The cure is to remove and strip the gearbox, flush the box clean, replace the bearings, set the preload correctly using the relevant spacer kit and refit. It is worthwhile replacing all the bearings in the gearbox (6) in case any swarf from the worn bearing has damaged or contaminated the other bearings. At the very least check them carefully and flush thoroughly. Approximate cost of repair: To remove gearbox, strip and replace all six gearbox bearings and refit gearbox - £850-£1150 inclusive of all charges. Back to question page