None can diagnose trans issues online. That's cool. Talked to tech and he said unplug harness so trans will default to both shift solenoids in "off" position.that will force trans into 3rd gear. Drive it and see if I can hit 40mph. If so, clutches are ok and it might be the accumulator o- ring leaking which can be fixed by dropping pan. Maybe. The 2 solenoids do a dance, 1 on, 1 off, or 1 on, 2 on, 1 off, 2 on and finally both on. 4 speeds with 2 solenoids