I have a 72 LeMans with a 400 sbc and TH350. The transmission seems to makes a whirring sound in park and neutral, and also through all gears. It does this regardless if the transmission is cold or warm. I not sure what type of torque convertor is installed since it's not the original drivetrain. I checked the fluid and it was at the proper level, with fluid hot and engine at idle. Thanks for anyones help on this, it's greatly appreciated.
Maybe dust cover is bent a bit and hitting the ring gear.
67curves wrote: Maybe dust cover is bent a bit and hitting the ring gear.
This will happen just about every time you run over a ford.