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Looking for power steering box for RD with what i call drop arm, pittman arm I think is correct term. I tried using box off a r685 but rd must have wider front axle because pittman was straight on the R685 as opposed to bend in the rd. When I took it off rd it was froze too the box and we ruined it. Maybe i should go new if available? Any advice appreciated. Thanks Brian

One other thought. The way the pittman arm attached to shaft coming off ps shaft differed between the two boxes. Maybe they make a rd pittman arm that would match up with box off the r? hope this makes some sense. i am not a mechanic by any means just trying to keep this old dog on the road.

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https://www.bigmacktrucks.com/topic/32728-power-steering-box-for-77-rd686/
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