Solved, NOT solved rear vibration

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Mar 20, 2021 | 06:59 AM

#16

Dweber85rc

Fleet Mechanic

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Take you rear driveshaft out and put it in 4wd and go for a drive. No vibration = driveshaft . Still have vibration then it's something else that is the problem

Mar 20, 2021 | 12:41 PM

#17

2002Ex

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From: Tacoma, WA

Quote:

Originally Posted by pirate4x4_camo

65mph vibration is drive line or wheels. take your pick.

i hesitate to post this,but it works grea. I would call an advanced DIY tactic. plenty of oppertunity of carnage here, if you have hesitation do not proceed. take your shaft back to the driveline shop

https://www.youtube.com/watch?v=zuPSGJZpL3k

Haha, yeah I'd rather bite the bullet and take it in to a different driveline shop.

Mar 20, 2021 | 12:47 PM

#18

2002Ex

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From: Tacoma, WA

Quote:

Originally Posted by Dweber85rc

Take you rear driveshaft out and put it in 4wd and go for a drive. No vibration = driveshaft . Still have vibration then it's something else that is the problem

Yes, I did this to prove that the mechanic I took it to did not fix anything, when they said it was fixed. I have the paperwork where they supposedly had the driveline and tires balanced. Yet the vibration was gone after driving with only 4WD. I later realized the pinion angle was off and got that corrected and now we are here.

I toook the rear flange bolts out last night and the u-joint is super loose. I can easily move it around, but I can't be sure it has play. I was suspecting the vibration from the bad pinion angle had reamed the u-joint, but the inspection did not yield that. Other than it being very free to move I got nothing there. The cap clips look tight as if it is, and it is, brand new. Although, I cannot be sure it is not centered perfectly. What the hell else could it be.

Mar 23, 2021 | 09:16 PM

#19

2002Ex

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From: Tacoma, WA

Quote:

Originally Posted by 2002Ex

Haha, yeah I'd rather bite the bullet and take it in to a different driveline shop.

Maybe I am going mad. I took the rear yoke off from the pinion flange just to inspect the u-joint and the u-joint seemed to have no play, but was super loose enough to flop down under its own weight. I said what the hell and put it in neutral and turned the whole driveshaft 90 degrees and reattached it. Went out onto the highway today and it really seemed like less vibration. Is that even possible? If so, what would that mean for my vibration? That it is the u-joint or balance?

Mar 24, 2021 | 06:58 AM

#20

Dweber85rc

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Is your driveshaft installed in phase?

Mar 24, 2021 | 09:20 AM

#21

pirate4x4_camo

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From: Northern California

Quote:

Originally Posted by 2002Ex

possibly

however it would not be the first pinion flange I have seen that is out of "balance"

* i cant really prove balance of the flange but for this conversation it illustrates the point, some just have a bad harmonic

Mar 24, 2021 | 11:03 AM

#22

2002Ex

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From: Tacoma, WA

Quote:

Originally Posted by Dweber85rc

Is your driveshaft installed in phase?

Yes, the ears line up and the driveline shop even put yellow arrows on it.

Mar 29, 2021 | 08:27 PM

#23

2002Ex

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From: Tacoma, WA

What did this dial indicate!

Quote:

Originally Posted by pirate4x4_camo

@Dweber85rc @EXSwap @pirate4x4_camo

I bought a dial indicator just to see if I could find something.

This is on the slip yoke:

This seems like a really big deal as it is just about 11 at the worst point.

I also checked the pinion flange and the transfer case output flange and they are perfect.

Also checked the driveline in two places and both had aberrations.

Driveshaft at rear: