I took the MH in for alignment with our Chevy Spark in the garage and told the tech about our thumping noises and he told me that they have found that this is actually being caused by the rear leaf springs mounting shackles. He undid the bolts and let the rubber liners "relax" and then tightened them back up again.
Also got Safety Plus steering damper put on and a side sway bar added to the back. Hopefully steering issues are improved. When I get it back will ck the CHF fix myself.
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