Hello, I dont know if this will help you,but I can tell you what is on the
inside of your transmission.Bently pictures will help greatly here. The pin
I think you are talking about seats at the base of one side of the second
gear band.The band itself is a circular piece of metal w/friction material
on it.It  does not form a full circle, but has a gap of about 4 inches at
the base of where it is installed.The pin actuates the clamping of this
band when activated,When activated, the circular band now is a nearly
complete circle.Very difficult to exlain.Anyway, to fix this , the pin will
have to be repositioned by hand.To do this , the valve body must be removed
(very easy),and the second gear adjustment screw will have to be backed way
off.This second gear screw contacts a pin , probably just like the one that
is out place.It is the pin on the opposite side of the base of the second
gear band. When working correctly, the piston pushes on one pin , and the
second gear adjusting screw pin(whew)holds fast.This squeezes the band
tight.The squeeze can be adjusted with the second gear adjusting screw.I
think yu must remove this adj screw all the way out,remove the valve
body,install the piston pinand piston,install the adj screw pin and screw,
and then the valve body. 2 hours work.Once again this is easy easy easy.If
you need help, I will tellyou the details of valve body removelGood luck,
Roger Sisler