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After much studying, I have decided that the transaxle bracket being in single shear was the problem.
I had been looking at it from the perspective of engine torque/drivetrain feedback torque......... taking a different angle now.
Engine/transaxle movement on the bumps at speed (or at low speed for that matter) certainly results in some verticle movement that is separate from the chassis movement. The mount being in single shear would be unable to do much for this, and I have had to retighten those two bolts that sandwich the poly block a time or two, which proves there was movement.
So I am going to add a second support to put it into double shear. Made the pieces last night.
The pieces will be welded in tonight and then drilled.
Meanwhile, since the trans is out anyways, I pulled the shift nosecone off to see how much sand had accumulated inside.
Got 2 teaspoons out. Mainshaft was a little stiff and crunchy turning it by hand, spraying PBblaster on the main bearing while spinning the input shaft flushed all the bad stuff away and out the drain plug. Well, maybe not all, but better than it was.
I'm modifying the nosecone a lunch today. Blocking off the factory vent (which was blocked previously, but had come unblocked sometime) and installing a neat little mechanical vent from a combine separator gearbox. I love sourcing stuff from the parts counter here at work.
If you don't know combines, the separator gearbox runs in one of the worst environments imaginable. Dust is constant and plentiful, think of the cloud of dust that spits out the back of a working combine, the separator gearbox is INSIDE this cloud 100% of the time the machine is working.
We have no failure of this unit from internal wear, so I trust this vent filter will work well for me in the sand. It has a felt seal that is spring loaded under that cap. The cap is loose fitting and the spring has light tension.
You can see the blocked factory vent at the top, its the shiney screw head to the left of the mounting boss.
More to come.
I had been looking at it from the perspective of engine torque/drivetrain feedback torque......... taking a different angle now.
Engine/transaxle movement on the bumps at speed (or at low speed for that matter) certainly results in some verticle movement that is separate from the chassis movement. The mount being in single shear would be unable to do much for this, and I have had to retighten those two bolts that sandwich the poly block a time or two, which proves there was movement.
So I am going to add a second support to put it into double shear. Made the pieces last night.
The pieces will be welded in tonight and then drilled.
Meanwhile, since the trans is out anyways, I pulled the shift nosecone off to see how much sand had accumulated inside.
Got 2 teaspoons out. Mainshaft was a little stiff and crunchy turning it by hand, spraying PBblaster on the main bearing while spinning the input shaft flushed all the bad stuff away and out the drain plug. Well, maybe not all, but better than it was.
I'm modifying the nosecone a lunch today. Blocking off the factory vent (which was blocked previously, but had come unblocked sometime) and installing a neat little mechanical vent from a combine separator gearbox. I love sourcing stuff from the parts counter here at work.
If you don't know combines, the separator gearbox runs in one of the worst environments imaginable. Dust is constant and plentiful, think of the cloud of dust that spits out the back of a working combine, the separator gearbox is INSIDE this cloud 100% of the time the machine is working.
We have no failure of this unit from internal wear, so I trust this vent filter will work well for me in the sand. It has a felt seal that is spring loaded under that cap. The cap is loose fitting and the spring has light tension.
You can see the blocked factory vent at the top, its the shiney screw head to the left of the mounting boss.
More to come.
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