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Reply to "oem u joint size"

FWIW, the u-joints specified for Spicer halfshafts cross-reference to Ford F-500 heavy duty trucks. These are one size larger than what contemporary sporty cars use. The OEM u-joints are a second size larger, but they seemed to be hardened thus more brittle back in the '70s.

Also, you'll get a noticeable vibration (mostly during acceleration) if even ONE of the sixteen bolts used to hold the halfshafts together are not fully torqued. Such vibration may have nothing to do with the u-joints. Its cured by torquing ALL the halfshaft bolts.

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