[Fot] TR4 High speed driveline vibration

[Jack Wheeler]

I had a high speed vibration years ago with my TR-4A IRS.  It was causing my engine to miss.  At the suggestion of an engineer friend, i took the driveshaft to a clutch and driveshaft company to have it balanced.  I'm not sure how closely the factory balanced them, or if someone using the driveshaft prior to me had done something to get it out of balance.  Anyway, after having it balanced, the vibration, and the high speed miss went away.  Problem solved.
Jack 
      From: "toodamnfunky at comcast.net" <toodamnfunky at comcast.net>
 To: fot <fot at autox.team.net> 
 Sent: Monday, June 15, 2015 11:55 AM
 Subject: [Fot] TR4 High speed driveline vibration
   
FoT,
I have a driveline vibration that doesn't start up until I get to about 95- 100 MPH. I figured I would start with the driveshaftbefore looking into the diff or OD/trans. I have an IRS car with Richard Good CV axles and hubs so it's very un likely its that butI will inspect them. I'm wondering if anybody has any advice on high speed vibration diagnosis or detection.What I'm wondering is even if it is the driveshaft how would I know with it sitting on my bench. Any help would, as always be greatly appreciated.Jim g
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