'06 2500 Front differential piled up. - Dodge Diesel - Diesel Truck Resource Forums



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'06 2500 Front differential piled up.

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Old 06-12-2018, 12:24 PM   #1  
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'06 2500 Front differential piled up.

So I was coming into town on the highway after dark a while back and started to hear a faint clicking that got louder, almost sounded like the serpentine belt was coming apart or something. Thought I better get under a street light and check stuff out but as I crept up to a stop light and 5mph or less the truck stopped kinda hard, like a break had stuck or something. When the light changed I couldn't move. you could smoke the back wheels in 2wd but the front wheels would not turn!

Ended up winching it onto a buddies tilt deck with the front wheels skidding the whole way. Drug the truck off with a tractor when I got home.

Thinking maybe something piled up in the transfer case I removed the front driveshaft, transfer case turns fine. But you cannot turn the pinion yoke to save your life,.

Pulled the front diff cover this morning expecting to find smashed gears and carnage. It was full of oil or atleast close to it, oil looked fine, no chunks and I can't see anything wrong. With the front wheels off the ground I can turn either wheel and of course the other rotates the opposite way.

What on earth is wrong with this thing?

Pinion bearing I guess?

Anybody have one of these apart?

I could really use some help with this one.
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Old 06-12-2018, 12:54 PM   #2  
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I know this sounds obvious, but did you check if the front pinion would spin with the front axle jacked up off the ground?

If the pinion does spin then likely what you heard was the front driveshaft double cardan joint. They make all kinds of noise when they go bad, but usually explode if you dont catch them in time. So either thats not what the problem was or you got lucky and caught it before things went haywire under there.
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Old 06-12-2018, 12:59 PM   #3  
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The front driveshaft is fine. Its the pinion that won't turn at all.
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Old 06-12-2018, 01:08 PM   #4  
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Well I cant imagine that your front pinion bearing seized up solid...but with no signs of metallic debris in the fluid. Even if the pinion bearing(s) were starved of fluid, it still would have showered some remains in the housing.
Do you have any pictures or video?
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Old 06-12-2018, 05:33 PM   #5  
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There really isn't anything to video of a pinion that won't turn I wouldn't say? It would just be a video of something not moving?

I can attach some pictures from inside the diff housing.
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Old 06-13-2018, 09:56 AM   #6  
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Are you able to turn the ring gear with a large screwdriver, if not check for broken toot on r/p gear, then u need to pull the pumpkin and tear it down, if bearings are frozen up{ be sure to break the pinion nut loose while it is in the housing, easier than on the bench} you need to check R/P gears for wear, Google A A M dodge diff. for a breakdown and parts, if u turn wheels while up off the ground, u are turning the internal's only in the pumpkin, hope it helps,,;;;
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