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#1
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New Flex Disk too hard?
I had my front flex disk replaced a few months ago. Since then there has been a vibration in the driveline under medium to high load. The tech who installed it checked the driveline for play, looked at the rear flex disk and support bearing. All checked out. Installation was apparently correct as well. They changed out the transmission mount with my permission without any better results. Had another tech check it out and he checked the whole driveline and now suspects the flex disk that was changed is of a harder/stiffer material. I accepted it but am now wondering. Does anyone have thoughts on the problem and the theory of the cause. Is the difference between the front and rear flex (as the rear one was not changed and is technically apparently still good) possibly causing an imbalance? Does anyone think changing the rear flex disk to the same as the front will stabilize the drive shaft given that apparently everything else seems to be ok? Thanks.
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#2
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did they seperate the driveshaft at the center support bearing? if they did they mat not have it indexed correctly. they are balanced in a specific location, if it is off it will vibrate, or they may have used an incorrect transmission mount, maybe too high or too low?
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1967 250 S 1967 280SE 1968 250S 1971 280 SE 1973 220 1974 280 S 1975 450 SEL 1976 220 D 1979 300SD 1983 300 SD 1985 230 TE euro 1986 280SL 1986 500 SEL euro 1986 190E 2.3 1990 300 SE 2003 C230 K 2004 C230 K 1987 560SEL 1987 300SDL now in canada 2005 C230 1998 C43 AMG Sold to DON 1993 190E 2.6 300TD Former daily driver Totaled current: R320 CDI Ram 2500 Cummins |
#3
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The cars driveline has to be rolled back and fotrth a few times to self align/settle before tightening the tans mount, center support, and shaft spline cinch nut. This can not be done on a lift that lets the suspension/differential hang..
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#4
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Double check the center support bearing. I had similar vibes on mine. I replaced both flex discs and the center support bearing AND mount. The rubber was worn in the mount and was not that noticeable. Everything is fine now.
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'85 300SD (formerly california emissions) '08 Chevy Tahoe '93 Ducati 900 SS '79 Kawasaki KZ 650 '86 Kawasaki KX 250 '88 Kawasaki KDX200 '71 Hodaka Ace 100 '72 Triumph T100R |
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