106-47-1 or 106-47-2 on rear?
Looking at installing Sumos on front & rear of our '17 Axis 24.1 (2016 E-450 chassis). Looks like SSF-106-40 for front and SSR-106-47 for the rear - those who have installed them, did you install 106-47-1 or 106-47-2 on the rear?
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