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Joe K · 06-21-2019, 02:42 PM

Pilot bearing in the center of the flywheel comes to mind. Bearings wear and this one is easily forgotten - or the input shaft stub which fits it is worn down. (Easily bushed on a lathe.)

When in gears 1 and 2, there is a side thrust to the input shaft which masks the vibration. When in third gear the torque is all "throughput" and the transmission input shaft is more free to "wallow around" at high speed which may be what you're hearing?

Sounds like a take it apart excuse.

Joe K

06-21-2019, 02:42 PM	#4
Joe K Senior Member Join Date: Jul 2010 Location: Cow Hampshire Posts: 4,188	Re: Transmission Bearings? Pilot bearing in the center of the flywheel comes to mind. Bearings wear and this one is easily forgotten - or the input shaft stub which fits it is worn down. (Easily bushed on a lathe.) When in gears 1 and 2, there is a side thrust to the input shaft which masks the vibration. When in third gear the torque is all "throughput" and the transmission input shaft is more free to "wallow around" at high speed which may be what you're hearing? Sounds like a take it apart excuse. Joe K __________________ Shudda kept the horse.