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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

diff poping when turning left???

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Old Aug 23, 2005 | 02:32 PM
  #1  
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diff poping when turning left???

Today I was hualing a mini track hoe with my 86 F-350 dually, like I normaly do from time to time, and encountered a horrible poping noise when turning left. Turning right, under load or not is fine. Turning left under load is the only way it happens. I can coast left not under load and be fine. I dropped the trailer and it still does it.

under load = using the gas
not under load = coasting

Any ideas what this could be? Anybody else have this problem.

Thanks
 
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Old Aug 23, 2005 | 03:11 PM
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Is this 4x4? Can you isolate the noise a little more by having someone listen from the outside while you drive it?
 
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Old Aug 23, 2005 | 04:18 PM
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could be a bad bearing as the bearing and the retainer hold the axle in when turning

Matt
 
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Old Aug 23, 2005 | 04:44 PM
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2 wheel drive, and deffiantly in the rear. I'll jack it up in the morning and see if anything is obvious. Thanks for the help.
 
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Old Aug 23, 2005 | 05:42 PM
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Okay, didn't wait untill morning. I jacked it up and pulled the axles. Both outer bearings look great. I took the diff cover off and no obvious shavings or anything in the oil. I'm not too sure what I should be looking at in there to be honest. I'm tempted to take the diff out but then what?

Just a recap, it only "pops" when turning left and you have it under load. Any amount of throttle will make it pop and if I push in the clutch it won't do it. Does not do it when turning right.

Thanks
 
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Old Aug 23, 2005 | 06:32 PM
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UPDATE:

I took the differential out and all the bearings and gears look great but the steel and friction plates are TOAST! There's grove marks in them.
 
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Old Aug 24, 2005 | 10:48 AM
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It was the limited slip clutch pack.
 
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Old Aug 30, 2005 | 12:47 AM
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Thanks for following up and posting the updates - really helps out those who are reading this later that may have a similar problem.

Razor
 
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