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Author Topic: Rear axle noise....  (Read 1424 times)

Steve

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Rear axle noise....
« Reply #15 on: July 09, 2008, 05:27:30 AM »

See now Spanky there strapped himself to the axle and had his wife drive the car around.   She wanted to get rid of him anyway. . . .
 
Just kidding Brian.  I've done it too.
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Brian

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Rear axle noise....
« Reply #16 on: July 11, 2008, 09:35:24 PM »

Quote from: POLARACO
That's the noise I was looking for in your description.  Either mis matched gears or a bad pinion.  The change should change some as you torque and untorque the rear while driving.
 
The noise doesn't change much when under load and free wheeling...just a slight change in pitch.
 
 
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Brian

02 Chrysler Concorde Lxi
84 Dodge Crewcab, Cummins/5speed
68 Chrysler Station Wagon 440/auto
48 Desoto 2dr Sedan flat 6/3spd manual

Steve

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Rear axle noise....
« Reply #17 on: July 12, 2008, 04:53:33 AM »

Is it like  howel or something else?
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Bill Mounteer

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Rear axle noise....
« Reply #18 on: July 12, 2008, 07:48:51 AM »

Brian, when you installed the pinion and adjusted the inner shim pack to get the correct gear lap, did you use bear blue so that you cold see the overlap and exactly how the contact surface looked?



If the inner shim pack shifted after you installed the outer shim pack and torqued  down  the pinion nut,  your overlap could have shifted. This will give you a whine. Also since the ring gear was a used one, did you use it's companion pinion gear? If not they could make funny noises until they wear in, but you may have to re-open it to adjust the shim packs again.  I've done a few of these swaps over the years on my Scout 4x4 and found installing used ring and pinion gears are tricky to get them to run quietly because you have to find, by trial and error, where they overlapped before. If you are off a bit, the gear surfaces will make noise as they wear in the "new" overlap position.

I also used 75W140 gear lube along with the recommended limited slip gear additive. I think the spec oil is about 75W110 but found it was noisy in the summer so I used the thicker stuff year around.


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Brian

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Rear axle noise....
« Reply #19 on: July 13, 2008, 09:06:13 PM »

Holy moly Bill....I aint that brave yet!!
 
This is a complete pumkin/ 3rd member swap so the set-up is what it was...could be good could be bad....
 
 
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Brian

02 Chrysler Concorde Lxi
84 Dodge Crewcab, Cummins/5speed
68 Chrysler Station Wagon 440/auto
48 Desoto 2dr Sedan flat 6/3spd manual

Bill Mounteer

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Rear axle noise....
« Reply #20 on: July 13, 2008, 10:12:00 PM »

It just looks complicated, but really its not. All you need is some bearing blue, some different thickness shims, a torque wrench, beer and patience.  When you get low on patience, add more beer. 

The inner shim pack simply positions the pinion to get the best contact and the out shim pack sets the preload. I forget the actual preload figure, you just turn the pinion using the torque wrench and see what the reading is to just turn the gear. I always use a beam type since you just read the lbs as the pinion turns. Don't think a fancy click type would work in this application.

So if you decide to really check yours out, put the rear axle up on stands, pull the axles out a couple inches, drop the drive shaft and check the preload. I'll bet it's loose as a goose. If so you'll have to reset probably both shim packs because the inner shims get pretty beat up if the preload is too low. All it takes is patience and of course lots of beer!


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Brian

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Rear axle noise....
« Reply #21 on: July 14, 2008, 12:00:26 PM »

I'm sensing a theme here...More Beer....More Beer....More Beer....
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Brian

02 Chrysler Concorde Lxi
84 Dodge Crewcab, Cummins/5speed
68 Chrysler Station Wagon 440/auto
48 Desoto 2dr Sedan flat 6/3spd manual

Steve

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Rear axle noise....
« Reply #22 on: July 14, 2008, 01:43:42 PM »

Quote from: thrashingcows
Holy moly Bill....I aint that brave yet!!
 
This is a complete pumkin/ 3rd member swap so the set-up is what it was...could be good could be bad....
 
 
Yeah, but not that expensive to fix
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Bill Mounteer

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Rear axle noise....
« Reply #23 on: July 14, 2008, 04:02:04 PM »


Quote from: thrashingcows
I'm sensing a theme here...More Beer....More Beer....More Beer....
Beer is the natural companion to duct tape!

With enough duct tape and sufficient beer it's possible to turn a rusted out beater into an unbelievable master piece - at least until the beer wears off!

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