87 GN Noisy Transmission

[hotrodstingray]

Noise problems with my transmission when in gear, noise goes away when the car starts to accelerate and noise returns again when the car is at idle in any gear. Similar to the noise of low power steering fluid.

I have inspected the flex plate for cracks and did not find any, Changed the transmissions mount. Replaced transmission filter and refilled transmission. Check all exhaust hangers and anything under the car which may be loose.

Sound seems to be coming from inside the transmission, the transmission shifts firmly and has no slippage. The transmission is totally stock with 57,000 original miles.

Anyone knows what may be the cause?

 

[justabuickv6]

I have no idea what's causing it but mine does the exact same thing.

 

[pracingrev1140]

might want to have a trans shop ,check your pressures in the tranny .could be pump going up just my 2c worth