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Unread 07-10-2010, 06:17 AM   #31
TeeJay00
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An update on the subject!

So here is what happened.

Another thing on my to do list was to investigate a drive line vibration. I knew the reason had something to do with the front drive shaft. So, I took it to the garage I deal with. We jacked up the car and it turns out that there is a little bit of play in the D30 pinion yoke. It moved up, down, left and right about 4mm !!!

So, he unhooked the front drive shaft off of it, removed the yoke, oil seal, crush sleeve, pinion bearing and checked inside for any damage or anything. Said everything looks fine and started to put the parts back together again.

Now he claims that the pinion nut needs a bit more tightning and this should solve the problem. He cleaned/polished the yoke and the crush sleeve a little bit, put in the new oil seal of course and then kept tightening the damn thing using the impact wrench up to a specific point he had in mind (as he claims) !!!

The vibration is gone and the ride is now a lot smoother than before. But can someone explain to me what did he do and is there anything wrong or scary in what he did???

I'm worried because of all this previous talk about the pinion nut and crush sleeve and how it shouldn't be tight too much

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Unread 07-10-2010, 06:23 AM   #32
biffgnar
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Quote:
Originally Posted by TeeJay00 View Post
So here is what happened.

Another thing on my to do list was to investigate a drive line vibration. I knew the reason had something to do with the front drive shaft. So, I took it to the garage I deal with. We jacked up the car and it turns out that there is a little bit of play in the D30 pinion yoke. It moved up, down, left and right about 4mm !!!

So, he unhooked the front drive shaft off of it, removed the yoke, oil seal, crush sleeve, pinion bearing and checked inside for any damage or anything. Said everything looks fine and started to put the parts back together again.

Now he claims that the pinion nut needs a bit more tightning and this should solve the problem. He cleaned/polished the yoke and the crush sleeve a little bit, put in the new oil seal of course and then kept tightening the damn thing using the impact wrench up to a specific point he had in mind (as he claims) !!!

The vibration is gone and the ride is now a lot smoother than before. But can someone explain to me what did he do and is there anything wrong or scary in what he did???

I'm worried because of all this previous talk about the pinion nut and crush sleeve and how it shouldn't be tight too much
A loose yoke nut can cause vibes. Hard to comment specifically on the fix given that your guy used an impact wrench. That was part of bnine's whole point. Cave man approach not really the best here.
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Unread 07-10-2010, 06:48 AM   #33
RubiconBlack
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What he had did was crushed the sleeve more to remove the slop. The bearings are worn and the crush sleeve keeps tension on the bearings. You should have replaced the bearings and the crush sleeve if there was play like that. The reasoning I had was if there was no play in the yoke. Sorry for my "Caveman" approach.
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Unread 07-10-2010, 09:09 AM   #34
TeeJay00
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So should I replace the bearings and the sleeve now or or what? Is this currently dangerous???
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Unread 07-11-2010, 04:20 AM   #35
RubiconBlack
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Its not dangerous! At this point just run it. It may get noisy again, it may not. Usually if you have the bearings out its best to replace them especially if they are loose like you explained. So for now just enjoy your smoother ride but don't be shocked if it happens again. If it does go bad again, I can post the correct procedure from chrysler for you.
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Unread 07-11-2010, 04:49 AM   #36
TeeJay00
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I see... Thanks
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Unread 07-11-2010, 08:05 AM   #37
dragginwagon406
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Quote:
Originally Posted by TeeJay00 View Post
First, this seal has been changed a couple of years ago
It's quite possible the only reason it was loose is because the nut was loose.

You are supposed to use a new nut (for the locking/holding). If the old nut was reused without any kind of thread locker, it is possible pinion nut simply backed off.

As long as the crush sleeve was not over-flattened, you should be OK. The impact approach would make me nervous, but I'm sure some technicians have a pretty good feel for how tight is right.
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Unread 07-11-2010, 11:49 AM   #38
TeeJay00
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Originally Posted by dragginwagon406 View Post
It's quite possible the only reason it was loose is because the nut was loose.

You are supposed to use a new nut (for the locking/holding). If the old nut was reused without any kind of thread locker, it is possible pinion nut simply backed off.

As long as the crush sleeve was not over-flattened, you should be OK. The impact approach would make me nervous, but I'm sure some technicians have a pretty good feel for how tight is right.
I don't want to sound so fobic or anything like that but I do have a road trip comming up in a couple of months. It will be about 2600 Km back and forth and will include a lot of wheeling at the destination!!

So??? Should I be concerned about this??? What's the worst thing that could happen with what he did?
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Unread 07-14-2010, 09:55 AM   #39
bnine
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In the extreme, he could over tighten and the pinion will seize. But if it hasnt in the first few hundred K, it wont.

Most likely it will return sooner then later as Rubiblack said. So long as it hasnt seized up, just run it for the time being.

If he didnt use a new nut, stake the old one, or use loctite, I suggest you paint mark the pinion nut and check on it once it in a while to ensure it isnt backing off.
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Unread 07-14-2010, 10:40 AM   #40
TeeJay00
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Quote:
Originally Posted by bnine View Post
In the extreme, he could over tighten and the pinion will seize. But if it hasnt in the first few hundred K, it wont.

Most likely it will return sooner then later as Rubiblack said. So long as it hasnt seized up, just run it for the time being.

If he didnt use a new nut, stake the old one, or use loctite, I suggest you paint mark the pinion nut and check on it once it in a while to ensure it isnt backing off.
Good idea
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