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Jeep speedometer gears at rockridge4wdDana 30 Truss for your TJ, LJ, ZJ, and XJClayton Off Road JK Long Arm Upgrade Kits!

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Unread 05-30-2013, 04:14 PM   #1
Cocopebels
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dana 30 problems

I'm having problems with my d30. Spins just fine until its locked in. All the small gears turn but the ring and pinion don't turn but 10-15 degrees then it locks up and won't turn any more until the teeth slip on the ring and pinion. What could be causing it to bind like this?

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Unread 05-30-2013, 04:23 PM   #2
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Can you jack up the axle and spin the front driveshaft?
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Unread 05-30-2013, 04:43 PM   #3
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I don't have access to a jack right now but I'm guessing it won't.
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Unread 05-30-2013, 04:50 PM   #4
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It only does it when the two front tires are locked together. IIvtaken the actuator off and used my fingers to lock and unlock it. So I know for sure its only when both axels are locked together.
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Unread 05-30-2013, 05:40 PM   #5
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Does the pinion yoke have any slop in it? You may need to crack the diff open and take a look inside.
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Unread 05-30-2013, 05:58 PM   #6
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Don't know what the pinion yoke is but I can grab it were the drive shaft attaches and it don't have any slop there...
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Unread 05-30-2013, 06:11 PM   #7
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So with the differential cover off like it was in the picture in the other thread, can you spin the driveshaft one full revolution?
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Unread 05-30-2013, 06:16 PM   #8
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Nope. Lock or unlocked can't turn it by hand. I can tap it around with a hammer.
img_20130530_192518.jpg  
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Unread 05-30-2013, 06:46 PM   #9
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Could the pinion bearing be messed up and causing this? Carrier bearings?
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Unread 05-30-2013, 07:28 PM   #10
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Quote:
Originally Posted by Cocopebels View Post
Could the pinion bearing be messed up and causing this? Carrier bearings?
Very possible. It looks rusty in there. How was the fluid?
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Unread 05-30-2013, 07:35 PM   #11
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Looks like more rusty water than oil on the gears and the cross pin. I would hazard to guess the bearings are all shot.


Is there shiny particles in the fluid? Kind of look like glitter?
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Unread 05-30-2013, 08:24 PM   #12
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Muddy water pored out when I opened the case. So I'm going to wish it was my transfer case wile I slowly rnr my front diff...
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Unread 05-30-2013, 09:27 PM   #13
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Don't bother washing it out if the water was muddy. Bearings are probably toast.
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Unread 05-31-2013, 05:18 AM   #14
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Based on that you should change all the fluids on your drivetrain...and like Nick said, your bearings are toast.
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