What I've always been told, not by experience myself, this could be a couple 3 three things.
1.) Pilot bearing on the Trans Snout, where it sits inside the Crank. It can be broken but still work, you will get vibration at certain times, usually in neutral or vice versa. It has needle bearings that fail. Older Cars, before the needle bearing style they used a solid "bushing" style(vs. bearing), which is what I put in when I do clutch job overhauls. No bearings, it will last 3 clutch jobs and never fail. Its made of Oilite Bronze, oil impregnated bronze. Doorman makes one PN#690-033.1, what I have now. McCleod makes them too but they're literally 8X the price and the same thing.
2.) Crank Damper(Harmonic Balancer) itself. Look at the "ring" of rubber your damper. There is a rubber isolater(thin layer) that keeps these two together. If its buldging or looks cracked or seperated its no good. Mine is currency bulding and Im getting a vibration in neutral above 4k. Same when in gear above 4k also. Try to find a balancer thats new, then look at yours, you'll see the rubber is flush and straight on the new one compared to one second gear hero drove. --------I would suspect this is your problem, I hope, otherwise you gotta pull the trans and everything, flywheel to get to the other $7 part.
3.) I've heard a flywheel can do this by one person, but I don't see how, mite be possible but I've always concluded with the first two scenarios.
1.) Pilot bearing on the Trans Snout, where it sits inside the Crank. It can be broken but still work, you will get vibration at certain times, usually in neutral or vice versa. It has needle bearings that fail. Older Cars, before the needle bearing style they used a solid "bushing" style(vs. bearing), which is what I put in when I do clutch job overhauls. No bearings, it will last 3 clutch jobs and never fail. Its made of Oilite Bronze, oil impregnated bronze. Doorman makes one PN#690-033.1, what I have now. McCleod makes them too but they're literally 8X the price and the same thing.
2.) Crank Damper(Harmonic Balancer) itself. Look at the "ring" of rubber your damper. There is a rubber isolater(thin layer) that keeps these two together. If its buldging or looks cracked or seperated its no good. Mine is currency bulding and Im getting a vibration in neutral above 4k. Same when in gear above 4k also. Try to find a balancer thats new, then look at yours, you'll see the rubber is flush and straight on the new one compared to one second gear hero drove. --------I would suspect this is your problem, I hope, otherwise you gotta pull the trans and everything, flywheel to get to the other $7 part.
3.) I've heard a flywheel can do this by one person, but I don't see how, mite be possible but I've always concluded with the first two scenarios.
