C4/FMX Driveshaft

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knn

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1971 Mach 1 (302)
Does anyone know if the driveshaft is the same for a C4 and and FMX behind a 351c (H-code)?

Thanks

 

Vicus

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I don't think so. Length of the drive shaft might be the same but you need a different version of the slip yoke.

Output shaft C4 needs slip yoke with 28 splines.

Output shaft FMX needs slip yoke with 31 splines.

Cheers Frank

 

knn

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Aug 27, 2017
Messages
113
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Location
San Francisco, CA
My Car
1971 Mach 1 (302)
I don't think so. Length of the drive shaft might be the same but you need a different version of the slip yoke.

Output shaft C4 needs slip yoke with 28 splines.

Output shaft FMX needs slip yoke with 31 splines.

Cheers Frank
Thanks!

I think I have both yokes.

Can anyone measure their FMX driveshaft length?

Thank you

 
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