Pinion Nut Size

[Kansan]

I have a '73 Cuda with the 8/34 sure-grip 489 case. My pinion nut seal is leaking and need to know what size the pinion nut is. If there are more than one size, please let me know.

Thanks,

Kansan

 

[john-9]

1973 Cuda if center section is original to the car should be 1-1/4 socket ,, and you will have a fine (29 ) spline yoke ,, if the center section has been changed at any point the early 489 cases were 10 spline and will have a 1-1/8 nut ,, if the center section has been rebuilt at any time it may have a 1-5/16 pinion nut for a fine (29 ) spline yoke as the rebuild kits may use the 1-5/16 nut .

 

[Kansan]

Perfect. Just what I was looking for. Thank you, John-9!

Kansan