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Old 08-03-2016, 08:34 AM   #1
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drivetran meets backend

Hello! This is my first post!

Well... The other day I had my bus towed.
For this, the tow truck guy had to drop my drive tran (I think that's what its called)

He left it for me to put back on myself.

I noticed that one of the curved brackets was missing to attach it to the back end.

There are two brackets (half circle) that each have to boldts to hold it to the back end.

What is this piece called and how hard is it going to be to find it?
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Old 08-03-2016, 08:42 AM   #2
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sounds like its a u-joint.

should be easy, napa or any auto parts store. take them what you have to match one up. not sure if they are universal or specific to the driveshaft. it just takes a couple of bolts to undo the drive line.
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Old 08-03-2016, 10:55 AM   #3
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Quote:
Originally Posted by wolfmansbrother View Post
Hello! This is my first post!

Well... The other day I had my bus towed.
For this, the tow truck guy had to drop my drive tran (I think that's what its called)

He left it for me to put back on myself.

I noticed that one of the curved brackets was missing to attach it to the back end.

There are two brackets (half circle) that each have to boldts to hold it to the back end.

What is this piece called and how hard is it going to be to find it?
Like this?


We have drive shaft specialists in our area that would carry these.
I just googled DIFFERENTIAL CAPS

Google Image searched U-Joint Saddle Cap and found this one at puredieselpower.com
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Old 08-03-2016, 11:06 AM   #4
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He probably "dropped the drive shaft", which is fairly common when towing these large vehicles. However, he should have put it back as it was when he unhooked from it. Not doing so was (in my opinion) unprofessional, and he lost (misplaced?) one of your caps. That should not be your problem; he should make good on his mistake (Not sure where you are, or who the company was, but it never hurts to call and ask).

I suppose I could overlook leaving the driveshaft if it is known that the vehicle may be towed again ... or never driven again (such as wrecked, or junked).
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Old 08-03-2016, 11:08 AM   #5
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Get proper torque for the bolts and make sure to use some LockTite on those threads.
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Old 08-03-2016, 11:22 AM   #6
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Tow driver probably said something like "disconnect the drive train." The drive train is the chain of things that make it go: the engine, transmission, driveshaft, etc.

A few tips to help you on the way:
  • there's a "spider" or "u-joint" at each end of the drive shaft. It has a cap at each of its four points. Inside that cap are a whole lot of needle bearings. If the cap comes off the bearings go everywhere and it's a bear (at best) to re-assemble. Don't let the caps fall off.
  • There may be a splined section in the middle of the shaft which allows the shaft to expand/contract in length. If the shaft becomes separated at the splined section due to curiosity, inattention, etc, it has to be reassembled in the right rotation. Usually (always?) that means the u-joints at the ends of the shaft are oriented the same way. Both of them aligned in the vertical plane, for example. If it's not done correctly it'll produce vibrations while driving.
  • U-joints and the splined area often have grease zerks for lubrication. This is a great time to add new grease. Do it after the caps are secured into the ears of the yoke on the transmission and differential, though, or the grease will force the caps off and you'll be in the "needle bearings everywhere" situation!
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