2586, a response:- Pitman arm location on the tapered spline. On my SP20 SA the thread for the 7/8" Whit. nut at the end of the spline has had 2 light punch dots on it, on the crest of the thread. These align with a similar pair on the outer face of the splined socket of the pitman arm when the arm is correctly positioned on the spline. The marks are faint indeed so it might just be worthwhile scrutinising yours if not already done so. Alan E.
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