Kevin; Thanks for the suggestion, but you may have missed a previous post. I just recently put new tires on, and this problem existed prior. Since there was no change with the new tires, I'm guessing they were not the problem. I also replaced drive shaft u-joints and had it balanced. Still no change. Based on the information I've been receiving, I think it is one of two things. - Problem in the rear end, with bearings or drive axles. - Balancing needed of my motor/flywheel/pressure plate/clutch assembly.
I will be trying to diagnose it over the next week. Hopefully I can figure it out. Thanks; Dennis Elsberry, MO http://www.evalbum.com/1366 http://evalbum.com/3715 -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of KevinF via EV Sent: Wednesday, June 11, 2014 11:22 AM To: ev@lists.evdl.org Subject: Re: [EVDL] Vibration Howdy! "Pestka, Dennis J via EV" wrote: > I don't know if this means anything, but let me repeat one thing. > Under acceleration with torque on the motor and drivetrain the > vibration is not too >bad. Starts showing up ~ 55 mph. When you let > off the accelerator at that speed, the vibration gets very bad and > >gradually goes away as the vehicle slows down to ~ 40 mph. Long ago in another lifetime I was a dealership auto mechanic and the first thing that I would check for vibrations that were a function of weight transfers and tire loading were the tires themselves. Not so much wheel balancing as the structural integrity of the tires. Since this can be difficult to see unless you're lucky the easy test was always to swap the front wheels with the rear and observe if the symptoms changed in any way. I have found this procedure to reveal bad tires on several occasions and I've always assumed that the tire had some type of internal damage or belt separation. It's relatively easy to check and has saved me from chasing much more complicated problems. Good luck! -- Kevin Flaherty Lurker and EV-wannabe for many years now _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
