Dan Fletcher Super Stock Videos - Opinions

Ken Miele · 10-05-2014, 08:53 PM

I'm looking for some opinions on what you think the vibration in the video might be coming from. Dan has been fighting a vibration for the last few races, and can seem to find out what it might be.

The first video is from inside the car, go to 30 seconds to see and here the vibration.

The second video is the camera pointing at the u-joint. You will here a noise when he slows down but it is the brakes not the vibration. Its hard to hear the vibration in this video, but there is allot of movement in the pinion. Not sure that is the reason, but I thought it might be a place to look.

Any ideas, feel free to post.

Larry Hill · 10-05-2014, 09:06 PM

Might want to look at the tail shaft bushing. Just a thought.

HR9121 · 10-05-2014, 10:21 PM

Had a similar problem when I had my HR car and as Larry suggested it was the tailshaft bushing.

DrJRacing · 10-05-2014, 10:25 PM

My limited experience with vibrations involved a bad shock (front).
Was most noticeable after the run during shutdown. A fellow racer (Rick Ryan) noticed a bouncing motion of my front wheel ...told me to check my front shock ...I did ...he was right. Thanks Rick and Jerry Ryan!
PS Congrats to Dan Fletcher on his latest Wins! Keep us informed on the final solution
Doug Jonak

Mike Taylor 3601 · 10-06-2014, 10:02 AM

By the video I don't believe it is driveshaft, I think you would see it on video when it happened,may be able to see on slow motion? I would think you would see moving during vibration,don't believe it is in the pinion angle changes or would have other spots in the run,because looks like angle changes are about the same,didn't notice a change when it vibrated.
In a way almost sounds like gear noise
Does this only happen at this one point during shutdown?
Mike Taylor 3601

Robert Simpson · 10-06-2014, 10:10 AM

If you have not checked it already I would check the ring and pinion and bearings. It sounds like it is when you are slowing down so it would not be on the load side of the gear but on the coast side. Plus all the loads are in opp directions on the gears and bearings. Hope you find it. Let us know..

tpoh815 · 10-06-2014, 10:39 AM

I think its the loose nut.............behind the wheel!

dartman · 10-06-2014, 12:47 PM

@ 26,27 sec it looks like the u joint is lose in the yoke.drive shift move but yoke doesn't.But I could be wrong

cad · 10-06-2014, 01:07 PM

Quote:

Originally Posted by Larry Hill

Might want to look at the tail shaft bushing. Just a thought.

The bushing in my glide came out the rear while I was at Bandimere for ET Finals. The vibration was bad right on shutdown and deceleration. Nothing on acceleration. And it leaked, so it was noticeable when sitting.

racerhead · 10-06-2014, 03:16 PM

Besides being interested in the outcome, that's some cool video.

Bruce Deveau

10-05-2014, 08:53 PM	#1
Ken Miele Live Reporter Join Date: Dec 2000 Posts: 4,561 Likes: 350 Liked 13,093 Times in 1,229 Posts	Dan Fletcher Super Stock Videos - Opinions I'm looking for some opinions on what you think the vibration in the video might be coming from. Dan has been fighting a vibration for the last few races, and can seem to find out what it might be. The first video is from inside the car, go to 30 seconds to see and here the vibration. The second video is the camera pointing at the u-joint. You will here a noise when he slows down but it is the brakes not the vibration. Its hard to hear the vibration in this video, but there is allot of movement in the pinion. Not sure that is the reason, but I thought it might be a place to look. Any ideas, feel free to post.

10-05-2014, 09:06 PM	#2
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,278 Likes: 1,636 Liked 9,455 Times in 1,957 Posts	Re: Dan Fletcher Super Stock Videos - Opinions Might want to look at the tail shaft bushing. Just a thought. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

10-05-2014, 10:21 PM	#3
HR9121 Live Reporter Join Date: Jan 2011 Location: New Bern, NC Posts: 3,353 Likes: 112 Liked 2,869 Times in 641 Posts	Re: Dan Fletcher Super Stock Videos - Opinions Had a similar problem when I had my HR car and as Larry suggested it was the tailshaft bushing. __________________ James Williamson W200 J/SA

10-05-2014, 10:25 PM	#4
DrJRacing Member Join Date: Mar 2010 Location: Zimmerman, MN Posts: 237 Likes: 17 Liked 0 Times in 0 Posts	Re: Dan Fletcher Super Stock Videos - Opinions My limited experience with vibrations involved a bad shock (front). Was most noticeable after the run during shutdown. A fellow racer (Rick Ryan) noticed a bouncing motion of my front wheel ...told me to check my front shock ...I did ...he was right. Thanks Rick and Jerry Ryan! PS Congrats to Dan Fletcher on his latest Wins! Keep us informed on the final solution Doug Jonak

10-06-2014, 10:02 AM	#5
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,303 Likes: 198 Liked 116 Times in 48 Posts	Re: Dan Fletcher Super Stock Videos - Opinions By the video I don't believe it is driveshaft, I think you would see it on video when it happened,may be able to see on slow motion? I would think you would see moving during vibration,don't believe it is in the pinion angle changes or would have other spots in the run,because looks like angle changes are about the same,didn't notice a change when it vibrated. In a way almost sounds like gear noise Does this only happen at this one point during shutdown? Mike Taylor 3601

10-06-2014, 10:10 AM	#6
Robert Simpson Senior Member Join Date: Aug 2004 Location: Jacksonville, Florida Posts: 803 Likes: 6 Liked 20 Times in 12 Posts	Re: Dan Fletcher Super Stock Videos - Opinions If you have not checked it already I would check the ring and pinion and bearings. It sounds like it is when you are slowing down so it would not be on the load side of the gear but on the coast side. Plus all the loads are in opp directions on the gears and bearings. Hope you find it. Let us know..

10-06-2014, 10:39 AM	#7
tpoh815 Senior Member Join Date: Oct 2003 Location: West Seneca Posts: 527 Likes: 48 Liked 18 Times in 8 Posts	Re: Dan Fletcher Super Stock Videos - Opinions I think its the loose nut.............behind the wheel! __________________ EX 5-Doorstocker

10-06-2014, 12:47 PM	#8
dartman Member Join Date: Oct 2005 Location: N.S. CANADA Posts: 498 Likes: 155 Liked 68 Times in 41 Posts	Re: Dan Fletcher Super Stock Videos - Opinions @ 26,27 sec it looks like the u joint is lose in the yoke.drive shift move but yoke doesn't.But I could be wrong __________________ 1231 FS/D Drag Pak 1231 E/SA 71 Demon Kelly MacKay Last edited by dartman; 10-06-2014 at 01:50 PM.

10-06-2014, 03:16 PM	#10
racerhead Member Join Date: Aug 2007 Posts: 187 Likes: 0 Liked 0 Times in 0 Posts	Re: Dan Fletcher Super Stock Videos - Opinions Besides being interested in the outcome, that's some cool video. Bruce Deveau