Sounds like you are doing the parallel shafts part correctly. Does not matter if the vehicle is level, just that the shafts are parallel to each other.

Are they parallel side-to-side as well? This is a bit tougher to measure, but it is as important.

Bill D.

At 09:27 AM 6/9/2014, Pestka, Dennis J wrote:
Bill;

When I originally set everything up, I thought I had this right. I have the small plastic gauge that Summit sells. I need to take a harder look at this again, but some have said that the vehicle needs to be level, and that's the challenge. Am I correct that it doesn't matter if the truck is level as long as both are showing the same angle. Also, can I use the motor as the reference point for the transmission output shaft ?

Thanks;
Dennis

-----Original Message-----
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Bill Dube via EV
Sent: Monday, June 09, 2014 10:17 AM
To: ev@lists.evdl.org
Subject: Re: [EVDL] Vibration

U-joints _require_ that the transmission be parallel to the rear-end pinion shaft. They can of course be offset, but the input and output shafts must be parallel to each other. You get vibration otherwise.
Is the input shaft parallel to the output shaft?

Bill D.

On 6/9/2014 5:49 AM, Pestka, Dennis J via EV wrote:
> Removed the drive shaft, had new u-joints installed, and had it balanced.
> No change.
>
> I’m guessing it’s either the angle on the motor/transmission in
> relation to the rear end, or I may have to pull the motor/flywheel/pressure plate/clutch assembly and have it balanced. > When I sit in neutral and rev to ~ 3000rpm, I’m getting some vibration, although it doesn’t seem to be as bad as when I drive. > Here again I feel it at ~ 50 mph and up, but it is really noticeable when I let off the accelerator at those speeds.
>
> Thanks;
> Dennis
> Elsberry, MO
> http://www.evalbum.com/1366
> http://evalbum.com/3715
>
>
>
>
>
> From: Daniel Busby [mailto:busby.dan...@gmail.com]
> Sent: Tuesday, May 27, 2014 1:52 PM
> To: Pestka, Dennis J; Electric Vehicle Discussion List
> Subject: Re: [EVDL] Vibration
>
> I'd try balancing your driveshaft. It's relatively inexpensive once you get it out. A local place in LA costs less than $70.
>
> My '64 Spitfire definitely has a wobbly shaft, but I haven't made the time to pull it out and get it balanced yet. I stick to surface streets in the meantime.
>
> On Tue, May 27, 2014 at 11:29 AM, Pestka, Dennis J via EV <ev@lists.evdl.org<mailto:ev@lists.evdl.org>> wrote:
> Didn't know if anyone had any clues to a problem I'm having.
>
> Since I have my new Lithium pack, I've getting my 65 Datsun out on the highway and up to ~ 60 mph. Never did much of that before. > When accelerating, I don't experience it, but when I let off the accelerator, I'm getting a pretty good vibration.
> Step back on the accelerator, and it goes away.
> Don't seem to notice it at 45mph and lower, but when going 55 - 60 mph.
> I just put new tires on it, and have had the front end aligned.
>
> Any suggestions ?
>
>
> Thanks;
> Dennis
> Elsberry, MO
> http://www.evalbum.com/1366
> http://evalbum.com/3715
>
>
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