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Old March 24th, 2006, 08:48 AM   #1
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Default Rear End whine

So my Dad's E-250 has some rear end whine, only on load (not coast, when coasting the whine goes away). It's not a high pitched wihine, more "medium" pitched. He took it to a mechanic up by him, and he said it might be a bearing, and that there appears to be barely any wear on the gears. The pattern looked good, and the magnet had barely anything on it.

So, would just changing the bearings take care of this, or would we need to install a new gear-set to properly fix this whine? No bearings appear to be overly worn or bad. There is only about 1000 miles on the whine noise.
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Old March 24th, 2006, 09:21 AM   #2
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Even thou the bearings look good... the inner race may be gaulling (sp?) away. causiong the whine. Also check the outer wheel bearings. did the fluid have a metalic swirl to it? Chances are the gear set is fine, if there is no visable wear on the ring gear or pinion. Master install kit and you are good to go.
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Old March 24th, 2006, 11:41 AM   #3
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That is what I figured, thanks Bill. But, I thought if it was a bearing it would whine in load and coast, it wouldn't matter, but I may be wrong.
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Old March 24th, 2006, 01:09 PM   #4
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how many miles on it?
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Old March 24th, 2006, 01:38 PM   #5
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It's probably the pinion bearing.
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Old March 24th, 2006, 01:59 PM   #6
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Quote:
Originally Posted by shawn
That is what I figured, thanks Bill. But, I thought if it was a bearing it would whine in load and coast, it wouldn't matter, but I may be wrong.
More so in load because of the thrust. As it gets worse it would do it more in coast. Because now you will be rocking the ring gear all over the pinion gear as it slows. See if the ring gear has any "stretching of the metal" look to it. it will look like a top veiw of waves in a lake from a distance. Best way I know how to describe it as of now.
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Old March 24th, 2006, 03:35 PM   #7
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Quote:
Originally Posted by KILLER"B&quot View Post
More so in load because of the thrust. As it gets worse it would do it more in coast. Because now you will be rocking the ring gear all over the pinion gear as it slows. See if the ring gear has any "stretching of the metal" look to it. it will look like a top veiw of waves in a lake from a distance. Best way I know how to describe it as of now.
Good description! I'll check that.

Bones, it's a 2002 E-250 conversion van, with 60K on the ticker.
Looks like next saturday they will be in town, so I'll be tearing the rear end apart and installing new bearings and seals.
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Old March 25th, 2006, 12:17 AM   #8
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Very good chance it's a pinion bearing. Wheel bearings tend to be very low pitched and independant of load/coast.

I guess there is a slight chance it's carrier bearings... but honestly it really doesn't matter... probably will replace them all anyway :)
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Old March 25th, 2006, 06:59 AM   #9
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Quote:
Originally Posted by GreaseMonkey
It's probably the pinion bearing.
Hence why I said get the master kit. You have to pull everything out to do. So might as well change those bearings while you are in there.
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Old March 25th, 2006, 09:25 AM   #10
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Thanks ya'll. Anybody have an idea what axle is in an E-350?
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Old March 25th, 2006, 09:29 AM   #11
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Quote:
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Thanks ya'll. Anybody have an idea what axle is in an E-350?
depends on the package i think

Got a VIN or axle code fromt the drivers door jam?
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Old March 25th, 2006, 12:13 PM   #12
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Hence why I said get the master kit. You have to pull everything out to do. So might as well change those bearings while you are in there.
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Old March 26th, 2006, 07:00 PM   #13
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Quote:
Originally Posted by Bones
depends on the package i think

Got a VIN or axle code fromt the drivers door jam?

The axle code in the drivers door jam says B4. So, Bones, what does that mean?
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Old March 26th, 2006, 08:09 PM   #14
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Quote:
Originally Posted by shawn
The axle code in the drivers door jam says B4. So, Bones, what does that mean?
thats a dana 60 or 61 with limited slip, with 3.54 or 3.73 gears.
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Old March 27th, 2006, 06:17 AM   #15
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how bout when you have whine up front that is worst in between load and coast?
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Old April 2nd, 2006, 11:44 AM   #16
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Here is an update.

Got a Percision Master kit from Reider. Took the D60 apart. Since when are Semi-Floating D60's C-clip? That was a shoker to me! The Discs were siezed on the shafts (we needed to take them off to have them turned). It looked like the inner pinion bearing was going bad, after looking at the outer race. The gears looked ok, you could see the pattern they have taken after 60K miles. But the pinion had me a little concerened, the top of the teeth actually looked like they are getting round. And there are 2 large shims that are on the outside of the carrier bearing! What the crap? I left them, and stuck them back in, it made for a nice snug fit like it should be. There is barely any backlash, wasnt' even before I took it apart, but everything else checked out ok.

The test drive was great, no noise. But, after looking at the pinion gear, and thinking about the lack of backlash, I don't think this was set up right from the factory, and I fear a new ring and pinion will be needed in the next 30-50K.
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Old April 2nd, 2006, 01:55 PM   #17
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The pattern should not actually be into the top of the teeth now that it has good bearing in it... as long as they were setup right.

A lot of time factory setups are CLOSE, but not perfect.
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