Whinny noise in overdrive when tq converter locked up (1 Viewer)

[stevoyorke]

I get a whinny noise when in overdrive and torque converter locked up driving from 47 to 57 mph, I was thinking the Bakelite washer maybe on its way out in the torque converter?. Would that sound about right as in other gears at that speed is fine... In overdrive accelerating without lockup is fine, only while the torque converter locks up it does this from what I can hear and feel in that speed range, am open to possibilities what it can be?? Thanks in advance for any pointers.

 

[Tools R Us]

What kinda car do you have?

 

[stevoyorke]

It's a 1996 Land Cruiser 80, 4.5 petrol with the A442f tranny.