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GM upper control arm cross shaft serrated washer
I'm rebuilding the front end on a 96 Impala. The upper control arm cross
shaft has a serration on the rear end of the shaft, that a serrated washer fits on, then the bushing, which also has serrations in it. Anyone know what the purpose of these serrations is? And, more importantly, it is more "serrated" on one side than another - that is, it will mesh tightly with the serrations of what it's next to- any idea which side goes next to the shaft, and which side next to the bushing? -- Lee K. Gleason N5ZMR Control-G Consultants |
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GM upper control arm cross shaft serrated washer
"Lee K. Gleason" wrote: > I'm rebuilding the front end on a 96 Impala. The upper control arm cross > shaft has a serration on the rear end of the shaft, that a serrated washer > fits on, then the bushing, which also has serrations in it. You sure the washer goes on first? Is this the retainer washer (as big as the bushing) that goes on just before the nut, or something smaller? > Anyone know what the purpose of these serrations is? The "serrations" (teeth on the ends of the bushing's inner sleeve?) are to keep the inner sleeve from turning on the shaft (and slowly cutting through it) with suspension movement once everything is tightened down. Since the bushing's outer sleeve is a press-fit in the control arm (and usually needs special tools ro remove/replace), the only thing moving should be the rubber flexing as the arm moves up and down. |
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