r16678

I have a 1979 L48 with manual trans. My Clutch Fork Ball Stud is 1 3/8 inch tall. All I can find is 1 1/2 tall ball studs. Does anyone know if they are interchangeable. Any help would be appreciated.
I did find this info
55-65 #3729000 1 1/2
66-75 #3887159 1st design 1 3/8
75-81 #3729000 2nd design 1 1/2

DUB

I know this thread somewhat applies to your question.

I replied to it in POST#18...and read it so you can check out what you have going on.

https://www.corvetteforum.com/forums...djustment.html

DUB

r16678

Thank you DUB, always appreciate your help

buns

Some info I found on the interweb.

The 3729000 ball stud ( at 1.5" overall length ) was used on all Corvettes from '55 to '81.

Except at the beginning of the '66 production they switched to the 3887159 ball stud, ( at 1.375" overall length ). It turned out this shorter ball stud could cause the clutch fork to hit the bellhousing. Later in '66 they changed back to the longer stud.

So, somehow, it appears that the shorter stud ended up in your bellhousing.

r16678

OK thanks I am pretty sure mine is original I have had the car since 1988. I order part number 3729000. The reason I am changing the original is I noticed that ball had groves cut into it from the fork, almost looked like metal friction heated up and caused metal to melt onto the section where the ball meets with the fork. I attached pictures.

r16678

I am a bit confused on the link below it says the part that I bought for my car is 1 3/8 in tall which matches my part. https://www.corvetteforum.com/forums...djustment.html

r16678

I found a link to the same part that was originally installed in my L48 1979 part 3887159
http://www.4speedconversions.com/3887159.html

However I am going with everyone's recommendation to use part 3729000 which is 1 1/2 inch tall.

DUB

I STILL would do a test before you complete the job. This is so when you finish connecting your clutch linkage you do not find that all of a sudden you no longer can attach the push-rod coming through the firewall due to linkage angles ahve changed.

When you check to see if your clutch fork is centered when it hits the pressure plate ( like I previously mentioned)...that you might need to go back to what was in it.

DUB

r16678

Thanks Dub, I did the check the distance to the new ball stud from the end of the ball housing is 4 3/4 with old ball stud it was almost 5 inches. I purchased a new oem replacement flywheel from summit (brand pioneer). I measured the distance and it is just above .96, so it all checks out. Thanks for the guidance and education.

DUB

Glad to read that you have been checking things out. I am sure that this will come out as you need it to.

DUB