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Technical Support / Re: Magnum chassis rear torque arm
« Last post by Eric Maclean Co-Admin on December 12, 2025, 02:07:46 PM »Brian
While your there you want to check the track bar mountings ( these are where the track bar attaches to the frame rail on the passenger side and to the top of the differential)
You will be looking for any cracks in the frame on the outside of the frame where the four bolts hold the track bar to the frame and again at the top of the differential where the track bar brackets are welded to the differential bango housing.
There have been a few coaches have these cracks appear ,it is usually caused by the torque rod spherical ball ends getting seized and creating a torsional twisting moment on the mountings fatiguing and eventually cracking or breaking the mounts out all together.
It is important to check those as you can understand how dangerous it would be to have the coach rear end shifting while at speed in a corner.
On my coach I found several of the dust boots had disintegrated and on the front end and there where two that where seized or near seized causing an growning noise when the coach moved up and down in its suspension travel .
This is why I ended up removing all the torque rods and cleaning/freeing them up installing new dust boots and grease fittings as shown in the COMMON PROBLEMS article I mentioned earlier.
Eric
While your there you want to check the track bar mountings ( these are where the track bar attaches to the frame rail on the passenger side and to the top of the differential)
You will be looking for any cracks in the frame on the outside of the frame where the four bolts hold the track bar to the frame and again at the top of the differential where the track bar brackets are welded to the differential bango housing.
There have been a few coaches have these cracks appear ,it is usually caused by the torque rod spherical ball ends getting seized and creating a torsional twisting moment on the mountings fatiguing and eventually cracking or breaking the mounts out all together.
It is important to check those as you can understand how dangerous it would be to have the coach rear end shifting while at speed in a corner.
On my coach I found several of the dust boots had disintegrated and on the front end and there where two that where seized or near seized causing an growning noise when the coach moved up and down in its suspension travel .
This is why I ended up removing all the torque rods and cleaning/freeing them up installing new dust boots and grease fittings as shown in the COMMON PROBLEMS article I mentioned earlier.
Eric