whistling tranny

[vic1992LX]

hello everyone
im having this issue with several 11 explorer transmissions which became more mysterious to me EVEN with my ford factory diagnostic tool (VCMII).
when setting the ignition key in the ON position without starting the engine I can hear a LOW whistling coming from the transmission (im 100% sure) and it keeps coming in all gear floor shift positions (PRNDM), after 10-15 minutes the battery voltage start draining down than 11v untill it die after 30 minutes, all the above is without starting the engine p.s i cant hear it when the engine is running. all fuses relays connectors sensors etc are ok....:
no DTC or fault when scanning everything and data logging, im sick looking for the problem!!
the whistling goes away by:-
1- setting the ignition to OFF or ACC.
2- disconnecting the transmission main connector (i hear a clicking sound while i do that).
3- disconnecting the PCM connector that going the transmmission.
the car was flooded in the USA and the transmission core (valve and solenoid bodies were replaced).
the transmission works just fine with no problems at all, up/down shifts o/d etc..everything normal.

hope someone tells me that's normal, just replace the battery it is bad!

 

[JK080]

Those transmissions have solenoids that are pulsed very fast to vary pressures in the transmission. I haven't noticed the noise you are referring too with that transmission but if you are not experiencing any issues or codes I would think that it would be a normal noise. I know other transmissions will buzz or whine from the solenoids and is a normal condition.

I would just replace the battery and monitor the transmission until or if any problems might pop up.

 

[vic1992LX]

Thanks for the fast reply. I have charged the battery and started the engine for 10 minutes then off, i found a stuck on relay (trailer stuff) so i removed it and hope everything goes fine.
I will keep you posted.