The Ford Bronco II doesn't have a transmission modulator valve in the same way a later, electronically controlled automatic transmission would. Bronco IIs (generally using the C4, C5, or A4LD transmissions) used a
governor and a
pressure regulator within the transmission itself to control shift points. These components are *internal* to the transmission, not an external valve like you'd find on some later models.
There's no single "transmission modulator valve" to find externally on the Bronco II. If you're having shift problems, the issue is likely inside the transmission itself, requiring internal repair or a rebuild.
