muncie fork ball stud

[Dennis D.]

I know there are 2 different sizes. 1 3/8" and 1 1/2". I believe my 70 M-21 uses a 1 3/8". I had a 1 1/2" and it seemed to work fine.(Iknow not broke, don't fix). In an attempt to be correct, I installed a lakewood adjustable stud at the 1 3/8".

In pulling my trans I noticed that the fork was digging into the firewall. May be the reason for my shift grinding. Why are there different sizes? To me the longer length would put the fork pivot futher forword.(away from the firewall). That would make the longer one a better choice for me.

If it has to do will the pedal adjusting, I am now at the lower end of the rod. I don't think I can adjust it any further down

Everything being equal,(correct trans, bellhousing, fork, clutch, throwout, etc), I must be missing something here?

Rather fix it now while its all apart.

BTW, I bubba'd it for now by grinding the upper edge of the fork to clear.

[Joe L.]

Re: muncie fork ball stud

Dennis------

Corvette V-8 engines used a 1-1/2" long clutch fork stud from 1955 to 1965. Then, from 1966 through early 1975 they went to a 1-3/8" long stud. In mid-1975, it was back to the 1-1/2" stud and that remained through 1981.

The 1-3/8" stud was discontinued from SERVICE many years ago and replaced by the 1-1/2" for all those applications originally using the 1-3/8".

The above 2 circumstances might indicate that GM found that the 1-3/8" stud didn't work out the way they thought it would.

[Dennis D.]

Re: muncie fork ball stud

Joe----

Just finished getting it all back together. Went with the 1 3/8". Hope I don't regret it Thanks