Speed Sensor. I have a 96 cougar. The speed sensor has gone out so the mechanic said. He put a new one in so he said. It lasted two months. I put two more in and they don't work either. The o/d light is flashing and the check engine light is on. The speedometer does not work. I would like to know what might be the problem. I have done all I know to do. Thanks,

No. replacing the TCC or the OSS, will not make the transmission work. You can unplug these transmissions and they will still work, less OD. Sounds like you may have stripped the torque converter oil pump gear. Common in these older Mercury/Fords.

is the check engine light on

if your standing in front of the car looking down at the transmission, the output speed sensor will be on the right (drivers) side of the front of the transmission. The sensor in the middle of the trans cooler lines is the input speed sensor. The output speed sensor looks identical to that one. It is easier to access/change it from under the car. You will need a 1' socket to remove and install the new one.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Hard to understand your English, but sounds like you have a 'speed sensor' issue. They are used by the transmission and speedometer to determine when to shift and display the speed.

A dealer/mechanic can diagnose what sensor needs replaced.

GL,
Todd

the speed sensor on the GM vehicle works for two things
the speedometer and the overdrive only

The trick is to snake your arm down the back, ajacent to the maifold pipe, and unplug the wiring harness. Should be a 10mm socket to unscrew the bolt that holds the sensor in place. Once the screw was out it was easy to pull the sensor out and rush to Auto Zone and get a new one. Reverse the process in putting the sensor in.

This may be your problem.


FORD: 1994-96 THUNDERBIRD LINCOLN-MERCURY: 1994-96 COUGAR ISSUE: Steering efforts at low speeds may intermittently increase to the heavier for highway setting on some vehicles. This is due to electrical "noise" from the Vehicle Speed Sensor (VSS) being picked up by the Electronic Variable Orifice (EVO) module. The EVO module then interprets this as an increase in vehicle speed and reduces the steering assistance to the heavier for highway level.
ACTION: Replace the EVO module with a new module that has improved filtering for electrical noise. Refer to the following Service Procedure for details.
SERVICE PROCEDURE Replace EVO module (F6SZ-3F712-BB). Locations are as follows:

• On 1994-95 vehicles, the EVO module is located under the package tray in the trunk.
• On 1996 vehicles, the EVO is located under the heater blower case on the passenger side.

Refer to Section 11-02 of the appropriate year Thunderbird/Cougar Service Manual for additional diagnosis and repair information.

PART NUMBER PART NAME F6SZ-3F712-BB Electronic Variable Orifice Module OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage
OPERATION DESCRIPTION TIME 960402A Replace Electronic Variable Orifice (EVO) Module - 1994-95 Thunderbird/Cougar 0.5 Hr. 960402B Replace Electronic Variable Orifice (EVO) Module - 1996 Thunderbird/Cougar 0.3 Hr.

call auto zone

You will have to get to it probably from under the car it will be located just to the right of the driver's side axle