Dunno 'bout "uneven" wear, but all of the trannies that I've had shuddering problems with have at least had WORN (out) yoke arms. Those arms start out life as rounded surfaces (hill-like) over which the throw-out bearing gently rolls into position, but as they age, they wear down to flat (plateau-like) surfaces, which, when engaging the clutch, tend to violently rock up and down till the clutch is fully engaged. Since replacing all of my yokes, I have had no problems with a shuddering clutch. Prior to replacing those yokes, I replaced: engine mounts, transmission mounts, TO bearings, clutch slave cylinders, friction plates and have had flywheels resurfaced, all at the advice of supposedly helpful list-members. None of these helped a bit, but new yokes did the trick. BTW, John & Al, you're both right. Oil on the friction surfaces of the clutch will develop hot spots where the steel of the flywheel is crystallized and becomes very "grabby", but a bad main oil seal will almost never get oil on those friction surfaces unless it is really spewing out (not likely). Karl Wolz |
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