What is the sensor on the top of my ‘78 FJ40 Transmission? (17 Viewers)

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I removed my FJ40’s transmission “hump” to clean things up. Can someone please help me ID the sensor i have circled? Think i might replace it before I button everything up.

Thanks much!
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Are you sure the yellow wire is your reverse switch? On my 79 4spd, the reverse switch wire from the harness is light blue with a red stripe, and as I recall, the switch is located where you have circled.
 
Last edited:
Are you sure the yellow wire is your reverse switch? On my 79 4spd, the reverse switch wire from the harness is light blue with a red stripe, and as I recall, the switch is located where you have circled.
The switch on top connects to a blue wire w/ a yellow tracer. The aft switch has two red wires with blue tracers inside protective yellow sleeve.

Ill dig up my wiring diagram 🤔

Thanks for your input.
Sam
 

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