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Discussion Starter #1
Hi all, I need help diagnosing a vibration that I can feel (and see) in the shifter of my 91 Spider. It is there most of the time though it sometimes seems to smooth out, come and go. It is there whether in gear or in neutral and seems to increase with speed. It isn't real bad but I would like to fix it if possible.

I recently had the rear end replaced (had a clunk) and the vibration seems about the same with the old and new units. I have new motor mounts, the engine runs pretty smoothly and I have replaced the sway bars, tie-rods, springs, shocks and nearly all the body bushings so it rides very smoothly.

Any help would be appreciated. Thanks, Pat
 

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Hi all, I need help diagnosing a vibration that I can feel (and see) in the shifter of my 91 Spider. It is there most of the time though it sometimes seems to smooth out, come and go. It is there whether in gear or in neutral and seems to increase with speed. It isn't real bad but I would like to fix it if possible.

I recently had the rear end replaced (had a clunk) and the vibration seems about the same with the old and new units. I have new motor mounts, the engine runs pretty smoothly and I have replaced the sway bars, tie-rods, springs, shocks and nearly all the body bushings so it rides very smoothly.

Any help would be appreciated. Thanks, Pat
motor/transmission bushings? I`m assuming that if it vibrates on neutral, drive shaft with his doughnuts is ok.
 

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Check your engine cooling fan. If you have thrown a blade, the off balance of the fan will cause your entire engine and drive train to vibrate. If that is the case it won't take long to wear out your water pump bearings as well.
 

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Discussion Starter #4
Thanks guys - I'll check the bushings and cooling fan. One thing my father suggested is having the driveshaft checked for balance - visually the front and rear halves appear to be lined up "in phase" but I'm wondering, what are the chances of a drive shaft getting out of balance unless it has been reassembled wrong and can a worn out shaft bearing cause this (it seems quiet but how do I check if the rubber support is OK)?
 

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I replaced the guibo, the center bearing, both uj's and regreased the spline. It is possible to build the two shafts 180 degrees out so mark up before stripping.
If you are a competant mechanic its a few hours work. If you dont have the tools/workshop it will be a pig of a job. www.classicalfa.com have the spares they are not expensive.
 
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