1989 Toyota 1/2 Ton, 22R 4 Speed driveline vibration
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From: Adrien.Beaudin on 7 Aug 2006 13:59 > Back to my original question - did YOU scribe or otherwise mark your > driveshaft so that you could reinstall it in the same orientation that you > removed it, not 180 degrees out at the rear? Did you reinstall it properly? > Cups centered in the rear yoke? No dirt, rocks, twigs or wooly mammoth in > the yoke which might have interfered with the cups seating properly in the > yoke? The joint itself is properly lubed with all needle bearings in place? > All lock washers present and accounted for? So I could rotate the installation of the shaft itself by 180 degrees to see if the vibration disappears... I didn't think of that - so no, I didn't mark the driveshaft in relation to the vehicle - I'll try that tonight I'm assuming that the joint is properly installed with all needle bearings in place ( the shop did this) I'll give the clips a visual to make sure all 8 of them are there > And... just to play Captain Obvious for a minute - did the vibration exist > BEFORE you changed your u-joints? Was there a specific problem that you > wanted to remedy or were you doing it "on spec?" No worries on playing captain obvious - a different set of eyes on an existing problem always helps.. There was a vibration before - it's gone but a different one is there now I could drive the truck at 80 before (with the bad ujoint) but I can't now - different, new vibration in the driveline -a > -- > Mike Harris > Austin, TX
From: SnoMan on 7 Aug 2006 17:04 On 7 Aug 2006 10:59:32 -0700, Adrien.Beaudin(a)gmail.com wrote: >So I could rotate the installation of the shaft itself by 180 degrees >to see if the vibration disappears... Unless there is a slip yoke in the driveshaft itself allowing you to take it apart and get it the two halfs out of sync, you cannot put it on wrong. ----------------- TheSnoMan.com
From: Adrien.Beaudin on 7 Aug 2006 17:15 There is no slip yoke on the driveshaft except for where it mates to the transmission. The Transmission end of the driveshaft is splined to mate with the transmission. that portion of the ds is about 6 inches long (roughly) and then the first u-joint, then the ds, then the second ujoint and the diff. so there is no 'incorrect' way to mount a driveshaft like this? Is it possible that the new ujoints 'unbalanced' the ds? and if so is the only solution to balance the driveshaft on the vehicle? I had some ds's fabbed for an old land rover project I had and they were balanced at fabrication and I never had an issue like this with them.. -a SnoMan wrote: > On 7 Aug 2006 10:59:32 -0700, Adrien.Beaudin(a)gmail.com wrote: > > >So I could rotate the installation of the shaft itself by 180 degrees > >to see if the vibration disappears... > > > Unless there is a slip yoke in the driveshaft itself allowing you to > take it apart and get it the two halfs out of sync, you cannot put it > on wrong. > ----------------- > TheSnoMan.com
From: SnoMan on 7 Aug 2006 21:59 On 7 Aug 2006 14:15:37 -0700, Adrien.Beaudin(a)gmail.com wrote: >There is no slip yoke on the driveshaft except for where it mates to >the transmission. > >The Transmission end of the driveshaft is splined to mate with the >transmission. > >that portion of the ds is about 6 inches long (roughly) and then the >first u-joint, then the ds, then the second ujoint and the diff. > >so there is no 'incorrect' way to mount a driveshaft like this? > >Is it possible that the new ujoints 'unbalanced' the ds? and if so is >the only solution to balance the driveshaft on the vehicle? > >I had some ds's fabbed for an old land rover project I had and they >were balanced at fabrication and I never had an issue like this with >them.. Check ol the Ujoint angle with a protector if you can because if they are not correct to cancle each other out (because Ujoints are not constant velocity) it can cause vibration ----------------- TheSnoMan.com
From: Jeff Strickland on 7 Aug 2006 22:59
"SnoMan" <admin(a)snoman.com> wrote in message news:mnued211iouu80iqi1jo7me0g1tbog2hb0(a)4ax.com... > On 7 Aug 2006 08:54:33 -0700, Adrien.Beaudin(a)gmail.com wrote: > >>No lift on this >> >>It's a 2wd, everything is stock - I have a 325lb wildernest camper on >>it at the moment and the springs are sagging a bit (I'm putting a pair >>of supersprings on it this evening) > > > Okay, my take on this is drive shaft joint angles. WHith age on load > the springs settle and twist a bit from input torque and change drive > driveline angle and Ujoints are constant velocity. You need to make > sure angle are the same on both ends of driveshaft for starters. (the > reason it does it is one gear at 40 and not another is because the > lower gear can apply more drive shaft torque which can wind springs up > more and change u joint angle more on rear axle connection. You might > also pull drive shaft and have it rebalanced if everytighing else > checks out. (Note, the rear joint should be tipped down with a bit > more angel that front when static because it will tend to rise when > torque is applied. But SnoMan, he had the same loading before he did the U-joint project. Id did not vibrate before, therefore the work he did must play a role in the new vibrations. |