126 transmission rebuild, should I?

I have 89 300SE. Flaring occurs 2/3 3/4 gears. I have adjusted modulator pressure 6 turns and eliminated all of it except when cold and shifting for 1st couple of times. I do get pretty hard shifts now when warm.

I have rebuild several engines, and am mechanicly inclined, however have never rebuilt an auto transmission.

Should I rebuild myself, and if so are a lot of special tools required, and does a new modulator valve come in the kits?


Your response is appreciated.