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front diff problems

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Old Dec 13, 2014 | 01:07 PM
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front diff problems

04 f250 4x4. I thought my front pinion bearings were gone so went to replace the but there was nothing wrong with them so pinion had some play in it so tighten it down changed all seals and put back together tried it out still slipping. What do I do?
 
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Old Dec 13, 2014 | 02:38 PM
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Originally Posted by dgulledge
04 f250 4x4. I thought my front pinion bearings were gone so went to replace the but there was nothing wrong with them so pinion had some play in it so tighten it down changed all seals and put back together tried it out still slipping. What do I do?
What exactly do you mean by slipping?
 
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Old Dec 13, 2014 | 02:47 PM
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It's like the pinion is not contacting the ring gear fully
 
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Old Dec 13, 2014 | 04:10 PM
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Originally Posted by dgulledge
It's like the pinion is not contacting the ring gear fully
Is there any damage to the ring gear?
 
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Old Dec 13, 2014 | 05:47 PM
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No damage to the ring or pinion gears
 
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Old Dec 13, 2014 | 07:22 PM
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Ok can you post a pic of the pattern,
How much preload is on the pinion bearing
How much backlash is there.
 
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Old Dec 13, 2014 | 07:44 PM
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Do you hear or feel anything when it's "slipping"? How are you testing the front drive train (is the rear drive shaft removed)? If you haven't already have you checked if your hubs are locked and in good clean and greased condition internally? I would think it would be easier to bend a crow bar in a sand box than tearing up an axle that's in our trucks (never mind the front one that only turns when 4x4 is engaged) but I guess anything is possible.
 
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Old Dec 13, 2014 | 08:21 PM
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So not sure about preload or backlash but I did try 4x4 with out hubs locked so no load on front differential. Still made a clunking sound jumping a little when in gear. I thank I went in the wrong direction by rebuilding the front axle. I thank I should have went in the transfer case instead.
 
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Old Dec 13, 2014 | 08:29 PM
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Originally Posted by dgulledge
So not sure about preload or backlash but I did try 4x4 with out hubs locked so no load on front differential. Still made a clunking sound jumping a little when in gear. I thank I went in the wrong direction by rebuilding the front axle. I thank I should have went in the transfer case instead.
Clunking and jumping sounds like universal joints to me.
 
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Old Dec 13, 2014 | 08:31 PM
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All u joints are new. It only a t up when in 4x4
 
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Old Dec 13, 2014 | 08:37 PM
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Originally Posted by dgulledge
All u joints are new. It only a t up when in 4x4
With the 4X4 engaged and the front drive shaft removed is there slop in the front output shaft from the transfer case?
 
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Old Dec 13, 2014 | 08:42 PM
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I'll check on the slack tomorrow. Do I need the transfer in 4x4 when I check for slack?
 
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Old Dec 13, 2014 | 08:49 PM
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Originally Posted by dgulledge
I'll check on the slack tomorrow. Do I need the transfer in 4x4 when I check for slack?
Yes that way it locks the output shaft.
 
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Old Dec 13, 2014 | 08:54 PM
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I'll check it tomorrow
 
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Old Dec 13, 2014 | 09:30 PM
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Dumb question, but are all of your tires the same brand and size? Just trying to rule out all of the simple cheap stuff before jumping right into the daddy big buck parts.
 
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