Where is the transmission modulator on a 1990 olds 98?

The transmission modulator on a 1990 Oldsmobile 98 is typically located on the transmission itself, specifically on the driver's side of the transmission case. It is connected to the vacuum line from the intake manifold. To access it, you may need to remove some components for better visibility, as it can be somewhat tucked away. Always refer to a service manual for detailed guidance specific to your vehicle.