SM 420 shift pin size
 

Anyone know what size roll pin fits in the SM 420 shift socket, I tried to query it on here, but it didn't find anything.

Re: SM 420 shift pin size
 

Shift pin? You're talking about the pins that push into the transmission cover to keep the twist lock in place?

http://www.earlycj5.com/xf_cj5/index...ebuild.112773/

Re: SM 420 shift pin size
 

Yes those are the pins I want to replace them with roll pins, the top will need drilled, so I wanted to know if anyone knows what size the inner part is, as it is just larger than where it fits in the top.

Re: SM 420 shift pin size
 

Roll pins don't usually last. Did you look at the link? It's a very creative way to solve the problem.

Re: SM 420 shift pin size
 

Hardened steel roll pins will last a pretty good while, when I worked at Blumenthals trans. we used to do this to worn 420 and 465's, I just can't remember the dia. They are easily replaceable as well. I just ordered a 120pc kit on Amazon, it was 10 bucks. Should be in good shape.

This would be a great repair though for someone that has the tooling to turn some steel down to make some replacements.

Re: SM 420 shift pin size
 

Well, tooling is cool but you don't need it to make pins like those. Cut the shank off a 5/16" bolt, drill through the center, tap it for a 1/4" bolt. You can install the bolt from the outside of the cover.

I believe the pins are 1/4" in the trans cover and 5/16" on the inside. You'd have to drill the cover to 5/16" to use a roll pin.