Driveshaft parts … u-joint?

[jsilva]

Does anyone have recommendations for replacing u-joints on the driveshaft (propeller shaft)? I was told Rockford might have some. I contacted them but haven’t heard back yet.

I’m getting a weird vibration when letting off the accelerator at 15mph and above, like going over rumble strips. I thought it was a rear diff mount bushing (one was toast) so I replaced the bushings and it’s still there. I noticed what looks like potential damage to the u-joint closest to the rear diff, so I figured next step is to try and replace that.

Anyone ever done that?

 

[SyntheticAtmosphere]

This was from a few minutes back...

https://www.mazdaspeeds.org/threads/propeller-shaft-rebuild.15525/

Still wish I had the part numbers.

 

[jsilva]

This was from a few minutes back...

https://www.mazdaspeeds.org/threads/propeller-shaft-rebuild.15525/

Still wish I had the part numbers.

Thanks for that link. I’ll see what I can turn up. I think I only need the rear most u-joint. Can you remember if that one was from the 70’s car or the other?

 

[SyntheticAtmosphere]

I cant give you any reliable info right now about replacement units, it was years ago. I also paid cash so I didnt get a receipt with item list. Sorry.
If you pull the rear joint out, measure the distance from end cap to end cap and the diameter of the end caps. Use these 2 measurements to cross reference a replacement. The rear joint is staked in so you need to find a way to grind/drill/break the small welds on the c-clips.