Cotter Key I had to replace my rear sensor but the biggest difference in what your unit is doing compared to mine is the four rear jacks were erratic on my but the front two big jacks always worked fine. My unit is a six-way hydraulic type. My rear sensor was quite a ways past the rear axle. It was actually on the second to last cross member. I did not need to detach all the corroplast that I did as I was led to believe it was located just behind the rear axle.
Talk to Lippert as they are usually willing to work with you on cost and shipping. You can find the sensor a bit cheaper on Amazon but I decided to work with Lippert as they really do try to help us owners out and they are great to work with.
Tom Marty
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