More Vibration, Driveshaft?

[Alexander van Gerbig]

    Well I am noticing more vibration from my driveline.  I have a slight
vibration at 6k rpm and higher, not too noticeable, but there.  Now I am
getting a vibration on decell at 2.5k rpm to just below 2k rpm, like a tire
scrubbing in a parking lot kind of feeling.  Happens in all gears, but
doesn't happen when coasting out of gear.  I am going underneath the car
tomorrow to take a looksee at everything.  The exhaust seems to be held up
alright, but it is kind of rotting away.

    What is, if any, consensus on vibration like this?  Fellow I talked to
today said it could be the driveshaft itself or the center bearings.  He
said the carbon driveshafts have a tendency to give out, or something to
that effect, comments?  I don't even know what driveshaft I have yet.  My
90q20v is a pre-march '90 build, old isv, single piston brakes.

    I plan to check the mounts out, but aside from that checking other
things is foreign to me.  How should I check the center bearing, anything
special?  Figure I'll be checking for play in all of these wearable parts.

Thanks,

Alexander van Gerbig -- '90 90q20v -- '88 80t (R.I.P)

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