my r19 auto 117000 ks has commenced to play up on light throttle 1 and 2 gears os but 3 jerks a few times b4 smothing out also 4 needs 3500 revs to make ok change used tb 2500 now it goes in and out tween 2500 and 3500. it seems ok when driven hard .is it terminal? anybody done a successful manual conversion? quoted price for a recon trans around $3500 plus labour. suggestions welcome. what about solenoid replacement?