Just bought a 1994 (2nd Gen) Hilux Surf SSR-X with the 1KZ-TE engine with 135,000 kms. Vehicle is RHD from Japan with automatic transmission.
It look's to have a locking front differential, but nothing looks different/unusual about the rear diff. No air lines or electrical lines running to...
Silenced the lock/unlock beep
Thanks for the link to yotatech forum. Found the piezo buzzer under the driver's side fender, right of the brake master cylinder (2004 SR5) as indicated.
Merely unplugged the beeper and taped up the connector.