who helps me repair automatic box A130 Toyota

Greetings to those who participate in this forum I ask for help I have to repair my automatic box of the Toyota Araya year 1991 The box after many years has begun to slide in the overwater
currently I do not have much capital and I have decided to repair it and not die in the attempt if you can give me some tips
something to which I should pay attention, in the graduation of the drum of the drum, although I remember it should be graduated? And the other is if I take the body of valves as I should remove it so that I do not confuse the balls that I carry inside I would appreciate the tips

God bless it

Greetings
thanks I commented that the automatic speed box the car's disassembly is one A131l I have disarmed it and managed to get the fault a loose screw that fixed the 2nd clutch of the transmission had also melted a Baquelita space washer for good luck had not shot the car since I present the clear fault slid for the reason that the clutch No. 2 did not act and I slide well I have placed good. disk etc.
Now I have a question since I have the car for about ten years on one occasion to repair the box in a workshop and when the retro acted it gives a hard blow to the change was for ten years like this this time I have decided to repair this fault I have reviewed the whole body of valves each of its pistons and the length of their spring and they are now correct in the accumulators pistons I have an abnormality in the box manual they give me some spring values. With the current ones I know that the problem of the coup when the retro of the box acts is in the measurement values ​​of the spring but I show you what the manual indicates and I send a photo of what I have in the current box

in the case B2 the manual gives me a general value 70.82 mm but in reality the piston has two spring it is possible that it can clarify this doubt that I have

in case C2 the spring that they recommend for 66.68 and the current one has 71 mm

and in almost C1 the small spring if it has the measure 48 mm but the other is 83 mm when recommended the manual 77.81 mm ???