There was a service caravan fro isuzu cauayan ( isabela) to a nearby town in our province today. Brought the isuzu bighorn there. i told them about the problem ( doesnt engage in 4th gear and O/d ) and the blinking o/d sign. The mechanic moved the tps ( which i thought ) hindi na nagbblink ung 0/d sign. A few test drive, hindi talaga nagwowork ung 4th gear and O/D...They told me ung valve body daw ang may sira..hanap daw ng surplus- ung buong valve body with sensors...