Adjusting Servo Pin for Firmer 1-2 Shift?

[6SENSE]

How difficult is it this to do? What is involved?
I am confident that we can do it with some instruction.
The tranny is my brother's and was just rebuilt out of town. 1-2 shift is not firm, 2-3 is. Concensus is that the servo pin needs to be lengthened.

I know Ive got a ATSG tech manual around here somewhere, not sure if it goes over servo adjustment or though.

 

[chris718]

this is the wrong place to look.after verifying proper line rise,work in the following sequence to achieve the desired results.start by increasing spring pressure in the 1/2 accumulator housing,then open up the 2nd clutch feed hole to .110 ,then install a 440 modulator cup plug in the 1/2 accumulator feed hole in the housing and drill out to .125 .if it is now too firm start opening the hole back up in the housing .01o at a time.if this dont work there is a problem.