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C3 trailing arm interchange years

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Old Jul 29, 2024 | 06:22 PM
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Default C3 trailing arm interchange years

I’ve got a line on rebuilt, unused 1980 fully loaded trailing arms for sale locally. Will these be a direct fit on my 1972? Are the spindle bearing support link mounting ears larger/wider on the 1980 than on my 1972, and if so, will there be a fitment issue?
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Old Jul 29, 2024 | 06:58 PM
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80-82 use a yoke on the axle not a flange like the 63-79's did. You can use them if you replace the yoke with a flange. The arms, axles & bearings are the same.

About 76 the backing plates were changed to gold anodized from silver.

The support leg heads are larger on mid 70's supports but it doesn't matter. The supports were slightly different .
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Old Jul 29, 2024 | 07:05 PM
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Is it as simple as swapping my 1972 flanges onto the 1980 trailing arms in place of the yokes? Are both a simple slip fit splined connection?
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Old Jul 29, 2024 | 07:08 PM
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So you’re also saying my 1972 strut rod should mount right up to the 1980 bearing support flange without issues, yes?
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Old Jul 29, 2024 | 07:34 PM
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Yes Steve, it'll bolt right together. The brake backing plate will be the wrong color. That's all.
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Old Jul 29, 2024 | 07:37 PM
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Thank you all! 🎉 😀
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