Hey guys, I wanted to know if anyone has ever replaced the diff studs/spikes on their 7. I had to cut about a 1/4 inch off one because a nut refused to not cross thread 8 months ago and now the other one decided to strip out as soon as it starts to get tight

So I cut two holes in the hatch area to take a peek at how Mazda welded them in. Pretty sturdy stuff, it looks like it's gonna be a pain to cut them out. I remember seeing a write up about subframe stud replacement which seemed similar but i thought i'd ask so i could get some more advice on it or info.

If someone has a better idea then cutting them out I'm all ears to that too

 

Could you not clean them up with a thread cutting die instead?

 

i had thought about it but the passenger side one is hurtin pretty bad and the drivers side one isn't looking a ton better.

 

there was a pic heavy thread years back in the 2nd gen forum where someone replaced those stud spikes.

 

https://www.rx7club.com/2nd-gen-archive-72/how-replace-differential-mounting-studs-795565/

Here ya go!

 

they always **** up when the diff slides down/up when you dont remove the subframe all the way to change the diff, and leave the front mount still bolted..
slices the **** out of your fingers too, don't ask me how i know....

 

thanks, i'll look again
or i'll follow this link lol

yeah, i don't even bother trying to remove one or the other anymore, learned that lesson quick. i drop the whole thing every time now and i've got it down to a science sadly enough. i think it only took me 15 or 20 minutes last time

 

that's not the thread I was thinking of but should be good enough. the thread I remember the OP replaced the diff studs and the sub frame studs, his were rusted solid. far more pics and more of a write-up.

 

https://www.rx7club.com/2nd-gen-archive-72/how-replace-broken-subframe-bolt-518333/

 

sweet, thanks for the link.

 

well the subframe ones are definately a LOT easier then the diff studs. the diff studs are welded in multiple places.