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Old 09-27-2021, 05:27 PM   #1
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W22 Ď02 12 point U-Joint bolts

Hope some one can help, our coach isnít with us at the moment and I need to make sure I take the right sockets -

Had to be towed a week or so ago. Tow man fortunately pulled #3 drive shaft at the rear differential.
I reinstalled later last week using a 10mm socket, but it tended to slip once I tried putting some torque to the bolts. I use decent Craftsman sockets, so donít think an issue with the socket.
I thought these chassis were all metric?

Bolts are 12 point. Iím thinking 3/8Ē 12 point, but if anyone happens to know, sure would be helpful. I canít find anything in the Workhorse manuals for the size.
Calculating 3/8Ē to metric tends to be slightly larger that 9mm@9.525mm so am thinking these guys are ASME or SAE.
And 12 point sure makes for shallow socket grooves.


TIA!
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Old 09-27-2021, 05:34 PM   #2
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Quote:
Originally Posted by MrMark52 View Post
Hope some one can help, our coach isnít with us at the moment and I need to make sure I take the right sockets -

Had to be towed a week or so ago. Tow man fortunately pulled #3 drive shaft at the rear differential.
I reinstalled later last week using a 10mm socket, but it tended to slip once I tried putting some torque to the bolts. I use decent Craftsman sockets, so donít think an issue with the socket.
I thought these chassis were all metric?

Bolts are 12 point. Iím thinking 3/8Ē 12 point, but if anyone happens to know, sure would be helpful. I canít find anything in the Workhorse manuals for the size.
Calculating 3/8Ē to metric tends to be slightly larger that 9mm@9.525mm so am thinking these guys are ASME or SAE.
And 12 point sure makes for shallow socket grooves.


TIA!
Just take a 3/8 and a 7/16 socket with. Twelve point heads are quite common on the u-joint bolts. They have shallow grooves but twice as many. They are used because there usually isn't enough room for 6 point heads.
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Old 09-27-2021, 10:04 PM   #3
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Good job on Having driveshaft disconnected.. you could have destroyed the whole rv.. always have that done.. now they make a special socket that fits that.. just go to local auto parts store and buy a set.. they are cheap and look like reverse of torx.. I cant remember that name off hand.. but once and a while you come across them.. so pick up a set and re tighten.. you really need to do that.. there is something in back of my head.. there is something to do with the way that head grabs into the yoke.. a normal 12 point socket DOES NOT WORK.. and use blue thread locker.. clean first with chem12 or electric contact cleaner.. brush threads up.. add blue locker and put back on.. make sure after all together.. grease u joint.. and do all of them.. good luck and let us know what you did and maybe better members then me will help you
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Old 09-28-2021, 05:23 PM   #4
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Just came back from a day working on the coach -

Driveshaft clamp bolts at the differential are definitely 3/8”. Easily reachable with a 3/8” 12 point socket on a 3/8 ratchet drive on a 6 inch extension. No special wrenches needed - except for the one bolt that had been replaced with a Grade 5 thru bolt and locknut - not sure what happened there but everything is secure.
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Old 09-29-2021, 06:50 AM   #5
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It sure is great when folks post solutions/outcomes of the problems they have. Thanks
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