Driveshaft Q - ZR-1 Net Registry Forums

QB93Z · 04-04-2010

Quote:

Originally Posted by Paul Workman

Thank God (and Bill B!) for beam plates, huh?

As long as one is keerful, do you think it would it be possible to spin it while on the jacks, or

?

P.

No F...ing way!!! Besides being really dangerous, the operating conditions of running the car on jacks would be so strange that you won't be able to tell if it is vibrating.

Also I would like to see you at BG.

Jim

Paul Workman · 04-05-2010

Quote:

Originally Posted by QB93Z

No F...ing way!!!

Jim...You shouldn't mince words...Just come right out and say what you mean!

Actually, I'd heard of ppl spinning on jacks for other reasons; just not for this one in particular. It sounds a little "precarious" to me as well, and no way would I ever be under any car (on jacks) while it was running. And, too I hadn't considered the angles of the drive shaft while up on jacks. That would add another element "fer sher".

Quote:

Originally Posted by QB93Z

Also I would like to see you at BG.

Jim

Dittos!

Will be good to see you again and to put faces on so many fellow Z-nuts! Hoping to have the Z back together and tuned up by then. That is the plan, at least. One way or 'nuther tho...

P.

tomtom72 · 04-05-2010

This is a fwiw..... I did it on a lift with my 72 and at idle speed. The rear suspension starts to cause the rear wheels to do this up and down motion, slowly at 900 rpms. I shut down quickly as it looked to be a bad idea. I plead youth and ignorance for that not so bright move!

Now maybe the C3's rear suspension configuration needs the car's weight to stop that kind of movement in the rear suspension, and the C4 has more "links" to it so maybe it will not oscillate like the C3????? I really do think that it's the IRS that causes the oscillation.....I think? You used to do it with live rear cars.

On the drive shaft thing, all my friends that are Auto-Tech grads always told me to mark the rear yoke...to save the time in flipping the shaft 180*.

Tom

billybaloneey · 04-05-2010

I seem to recall a post by rhipsher aka Rick...it wasn't to long ago. He might be able to describe the symptoms that led up to him having to do a reversal.

04-05-2010	#3
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,609	Re: Driveshaft Q This is a fwiw..... I did it on a lift with my 72 and at idle speed. The rear suspension starts to cause the rear wheels to do this up and down motion, slowly at 900 rpms. I shut down quickly as it looked to be a bad idea. I plead youth and ignorance for that not so bright move! Now maybe the C3's rear suspension configuration needs the car's weight to stop that kind of movement in the rear suspension, and the C4 has more "links" to it so maybe it will not oscillate like the C3????? I really do think that it's the IRS that causes the oscillation.....I think? You used to do it with live rear cars. On the drive shaft thing, all my friends that are Auto-Tech grads always told me to mark the rear yoke...to save the time in flipping the shaft 180*. Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

04-05-2010	#4
billybaloneey Join Date: May 2008 Location: Mauriceville, Texas Posts: 179	Re: Driveshaft Q I seem to recall a post by rhipsher aka Rick...it wasn't to long ago. He might be able to describe the symptoms that led up to him having to do a reversal.