on my 88gxl ,the front u joint is getting bad. are the front and rear u joints the same diam. cause i have an xtra one with a good rear one . maybe a shop can press them in , since there doesn't seem to be any clips holding them in.

 

I never actually had to mess with any driveshaft on either of my FCs, but I do know that the stock driveshaft doesn't have replaceable U-joints. You can buy the Mazdatrix one that has them or you can take it to a driveshaft shop and see what they can do.

 

There are U-Joints available from Rockford that can be used. It is best to have a driveshaft shop do it so they can re-balance the assembly.

Here is the thread for the details:
https://www.rx7club.com/forum/showth...AND+replace%2A

 

Buy a new one, or if money is tight get a used one. Driveshaft shops can put new joints in by running a bead around the caps, but then it needs to be balanced. Some have said that they do not notice any vibration unbalanced. I'd personally buy a new one and be done with it.

 

thanks for the replies

 

thanks for that link , banzaitoyota

 

get a fiber one as long as you're doing it

 

You could just get one from a junkyard car, much cheaper.
Why get a fiber one? Have you ever lifted a Driveshaft? They are light as hell even in metal, and they are so thin that the rotational mass is almost nothing. Not worth the money IMO.