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02-17-2009, 02:26 AM | #1 |
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need advise: driveshaft problems i think
ok so i took my driveshaft down to a driveline shop yesterday(the 16th) that builds custom & high performance driveshafts(they have been their a while and heard they do good work). took it down because mine had a wobble while driving. well after i got it back he said that every thing is good to go now but it was pretty bad before he started(he had to fix the splined nub on the end cuz it wasnt welded on strait), drove it for a while like that but not on the freeway. it now has a new carrier bearing and fairly new u-joints still. but here is my question and problem: when i drive it on the freeway it feels like it is vibrating pretty bad and i dont know why because i just had it fixed, is their anything else that i can check that can cause this?
any help at all would be very much appreciated Last edited by project 67 sub; 02-17-2009 at 02:28 AM. |
02-17-2009, 02:46 AM | #2 |
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Re: need advise: driveshaft problems i think
Go back to the drive line shop.
With a 2 piece drive shaft, the front & rear drive shafts could be "out of phase" if you separated them to take the drive shaft home. Have him/them get everything balanced and then index the front/rear shafts so you know how they go together, when you get it back home to the truck. I hope that made sense, if not, PM me or add to your thread.
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02-17-2009, 03:24 AM | #3 |
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Re: need advise: driveshaft problems i think
i had him take it apart and put it back together. the rear shaft is a new slip joint style i bought from cpp a while back.>>>http://www.classicperform.com/Store/...ruck/CPSSD.htm
Last edited by project 67 sub; 02-17-2009 at 03:24 AM. |
02-17-2009, 03:32 AM | #4 |
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Re: need advise: driveshaft problems i think
Oooops.
I freely admit that you have surpassed the scope of my knowledge. But I would really like to know how you solve the problem
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02-17-2009, 03:37 AM | #5 |
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Re: need advise: driveshaft problems i think
hahah no problem bro. I would really like to know how to solve the problem as well and if i find out i will let you know
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02-17-2009, 04:05 AM | #6 |
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Re: need advise: driveshaft problems i think
I would truly appreciate that.
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'69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck |
02-17-2009, 04:06 AM | #7 |
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Re: need advise: driveshaft problems i think
are you having the same problems to or someting simular
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02-17-2009, 04:08 AM | #8 |
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Re: need advise: driveshaft problems i think
No.
But when it comes to things like "our trucks" I just like to have as much knowledge as I can gather crammed into my little pea sized brain. Hope that made sense to you.
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'69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck |
02-17-2009, 04:15 AM | #9 |
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Re: need advise: driveshaft problems i think
oh yeah it made sense cuz im the same way. lol.
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02-17-2009, 08:38 AM | #10 |
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Re: need advise: driveshaft problems i think
Have you already ruled out a bad tire/wheel/shock? They're all things that coud cause a vibration at one speed but not another.
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02-17-2009, 09:05 AM | #11 | |
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Re: need advise: driveshaft problems i think
Quote:
x 2 ! , I have also had slightly bent/warped axles cause vibrations as well....
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02-17-2009, 01:36 PM | #12 |
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Re: need advise: driveshaft problems i think
all the shocks are still fairly new and the tires are not that old as well. the vibration that i have i dont feel it in the steering or anyting but i feel it through the floor boards all the way up into the seat
Last edited by project 67 sub; 02-17-2009 at 01:38 PM. |
02-17-2009, 09:13 AM | #13 |
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Re: need advise: driveshaft problems i think
I would say take it to the driveline shop and let him drive it.He's the pro(expert is a different animal).He should be able to tell you what is going on.
When I'm stumped I always go to the pros,usually the ones on this BB but drivelines are kind of like carbs.They seem like black magic to those of us who do not know.
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02-17-2009, 09:52 AM | #14 |
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Re: need advise: driveshaft problems i think
Something to think about,,,
If the yolk was not on the ds straight and you drove it that way for and extended period of time it could have caused damage to the pinon bearing. If the ds was bad enough just that wobble could cause pinon bearing damage aswell. I would take it back to the shop for them to drive and check out on the truck. Hopefully it will be something simple and they can take care of it while you wait. Just a thought, Frank
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02-17-2009, 10:27 AM | #15 |
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Re: need advise: driveshaft problems i think
If and when you rule out the driveline, and if you still have an issue, check your flywheel/flexplate. Have you had this problem for a while? Have you changed fly/flex? I fought this same problem for sometime doing just what you are doing, replace this, balance that, and some smart bguy on this board suggested the flywheel and it looked fine but changing it took care of my problem. Good Luck. Gary
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02-17-2009, 10:54 AM | #16 |
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Re: need advise: driveshaft problems i think
we ballanced a shaft for a guy 3x, turned out that his pinion yoke was very offcast (a lot of its mas was off to the side).
after working in a driveline shop i realize that theirs alot more to making a driveshaft work other than just making it fit. it never hurts to double check things like are all of the ujoint keepers in properly, is the rear joint centered in the pinion yoke, and signs of hitting anything with the driveshaft. take te truck back to the same shop you had it ballanced at. a reputable shop should check the ballance for free, if theirs no signs of damage. guys that see this stuff everyday know what to look for.
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02-17-2009, 12:36 PM | #17 |
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Re: need advise: driveshaft problems i think
a couple of overlooked things are trailing arm bushings and panhard bushings as well as pinion angles if truck is raised or lowered. rearend bearings too
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02-17-2009, 01:46 PM | #18 | |
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Re: need advise: driveshaft problems i think
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02-17-2009, 02:23 PM | #19 | |
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Re: need advise: driveshaft problems i think
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02-17-2009, 03:08 PM | #20 | |
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Re: need advise: driveshaft problems i think
Quote:
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02-17-2009, 01:18 PM | #21 |
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Re: need advise: driveshaft problems i think
I just dealt with this issue and the culprit in my situation was a worn pinion yoke. The u-joint had just a tiny bit of play side to side. Only noticed at speeds above 60mph.
Does the vibration occur in nuetral as well? |
02-17-2009, 01:49 PM | #22 |
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Re: need advise: driveshaft problems i think
only at about freeway speeds (its pretty bad)
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02-17-2009, 04:19 PM | #23 |
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Re: need advise: driveshaft problems i think
think i might have found the problem(almost positive) but not sure. would the front u-joint bye the trans yoke cause it if it has a little side to side play, and should the yoke have any play in it itself? any help at all is greatly appreciated, cuz im trying to make it more reliable and get it ready for a carshow coming up on the 14th
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02-17-2009, 04:24 PM | #24 |
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Re: need advise: driveshaft problems i think
u-joints should never have any play in them!!! well the crap that precision makes has about .030 endplay when new....
trans yoke will have a little play. make sure the keepers are in the ujoints properly.
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02-17-2009, 04:53 PM | #25 |
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Re: need advise: driveshaft problems i think
the keepers are in the u-joints correctly i guess that i will change that front one out cuz of the play it has and because i just realized that its about 3 years old now that i think about it, and hopefully this will fix my problem or at least make it a little better
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