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M380 (Unique Issues) If you have a unique issue with your M380 model coach and it can't be answered in one of the other forums here, then this is where you can list it.....list your M380 Parts here too.

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  #21  
Old 12-26-2018
mahansm mahansm is offline
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For the rear wheels you will also need a square socket for the inner studs. Proper dimensions are 1 1/2 inch hex and 13/16 inch square. Use the term "Budd" to search and listings will pop right up.
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Stephen & Kathy Mahan
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1999 LXi 43 dual slide
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  #22  
Old 12-27-2018
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RVinCT RVinCT is offline
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Quote:
Originally Posted by mahansm View Post
For the rear wheels you will also need a square socket for the inner studs. Proper dimensions are 1 1/2 inch hex and 13/16 inch square. Use the term "Budd" to search and listings will pop right up.
Are you sure about this? I have an M380. I'm told it does not have L and R threaded studs (as most Budds seem to have). Here's a photo of my stud and nut.

There's no square end on the stud.

The torque multiplier fits well on the rear wheels with a 33mm socket. I'm in the process of checking the torque needed on the 1:64 TM input shaft to get 450-500 footpounds on the output shaft.
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  #23  
Old 12-27-2018
Reid Kuhlman Reid Kuhlman is offline
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Hi Todd you have piloted hub wheels on the 380 and 450 all right hand threads and 33 mm nuts the picture shows a bud or stud centered setup those have inner and outer nuts left hand threads on drivers side and right hand threads on passenger side older mopar cars same way with left and right threads Reid
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2007 M450 LSI Body #W000640
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  #24  
Old 12-27-2018
Reid Kuhlman Reid Kuhlman is offline
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sorry just looked closer those are piloted hub
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  #25  
Old 12-27-2018
mahansm mahansm is offline
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OK, it's different from my LXi wheels.



A little arithmetic says that 64:1 torque multiplier should have (450/64)= 7.06 lb-ft of torque at the input plus a little for frictional losses.


I have a 12:1 multiplier, so it takes 37.5 lb-ft. Of course, I just use a giant torque wrench directly (no multiplier) and set for the desired value.
Just for completeness sake, I've also got an air impact (3/4") and a torque stick.
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Bubba & Mattie (malti-poos)

Lynn Haven, Florida
1999 LXi 43 dual slide
Honda CR-V toad

850 814 9022
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  #26  
Old 12-27-2018
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Quote:
Originally Posted by mahansm View Post
A little arithmetic says that 64:1 torque multiplier should have (450/64)= 7.06 lb-ft of torque at the input plus a little for frictional losses.
One of my favorite quotes:
"In theory there is no difference between theory and practice. In practice there is." Yogi Berra

It took 25 ft pounds to loosen a wheel nut and 23 to retorque it back to the same point. The same result was found on 2 nuts. It's possible they were both seriously over torqued. Thus the desirability of testing and measuring. I broke my breaker bar doing the test today. I guess it didn't like 450+ ft-pounds. Good thing it's Craftsman. They always ask how long the pipe was when I return a broken tool for a new one. It was 10' this time.
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2007 Double Slide M380 "Bertie"
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  #27  
Old 12-31-2018
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A quick update. On the 64:1 torque multiplier I did some torque testing. As you rotate the input shaft, the teeth on the internal gears engage and disengage causing the torque to go up and down as the base of one gear tooth presses against the tip of another and vice a versa.

I tested at 497 ft-lbs (and a few others). As the input shaft rotated, it took 14 ft-lbs to turn about 10 degrees (producing 497 ft-lbs at the output), then it increased to 18.5 for a degree or two, then dropped back to 14 ft-lbs.

The maxumum number varied more than the lower number. One way to use it would be to set the max number on the torque wrench, rotate until that torque was reached (at a high point) and then verify that the lower torque was correct between the peaks.

Obviously, it's not the best way to set wheel nut torque, but it should be good enough to get a wheel off, then repaired, then reinstalled, if necessary.

I'll probably never even need it, but I'm uncomfortable when I don't have the tools necessary to get myself out of a problem.
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  #28  
Old 12-31-2018
tintent tintent is offline
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Twist em down till they smoke and back up a flat that will get you home
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