In January we test drove a 2021 Quantum JM31 built on the 2020 Ford E450 with the 7.3 V8. We thought it was noisy and had already done research on how to improve the insulation. That was going to be one of our first projects until we drove our new 2022 JM31 built on the 2021 chassis. Evidently Ford has improved the insulation because the 2022 was significantly less noisy than the 2021. Trying to figure out how to get the radio out today we pulled the dog house. We took a few photos showing the insulation and the engine. Notice that the XM Radio module was just hanging down. It is now mounted up high with cable ties. Looking at the part number on the plug wires we believe they are the updated version.
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