Auto Gearbox noise

[Barry k]

Hi, My auto box on my 96 is making a fairly loud `whiring ` noise, really noisey in enclsosed car parks etc, the box seems to work ok,changes are smooth and pick up is good, oil level is correct and looks clean. Any ideas anyone ??

[illusionalvr]

try changing fluid thickness?

[hako]

I'd double-check exactly where the noise is coming from - sound travels! Does it happen with the car in D but stationary?....reverse?...does it speed up when the car speeds up?

[Barry k]

I'd double-check exactly where the noise is coming from - sound travels! Does it happen with the car in D but stationary?....reverse?...does it speed up when the car speeds up?

Yep,noise defo coming from gearbox,not there in n with engine running,but present when i select all other drives, when moving the noise increases with revs ??? Any ideas ???

Thanks in advance

[hako]

If the noise increases with revs, I'd suspect an exhaust leak...maybe from a header or the cat. Seeing as it's not present in D when stationary that rules out propeller shaft/centre bearing....also only thing moving in D whilst stationary is the torque converter and oil pump...rest of auto is stationary waiting to move.....possibly the flex plate is cracked/split???. Maybe engine mount allowing drive train/exhaust to rub against body.
Can you confirm that the noise increases with revs or speed i.e. when it changes gear does the noise slow down as revs drop even though car speed is the same?

[vt s]

had a few vs having a similar sound but was told by my old boss who used to work for holden that it was due to the shallowness of the auto pan all the oil slushing around. dont know if this is your problem though maybe someone else has heard of this

[Barry k]

Dont think its exhaust related, the noise does slow as the revs drop as the box changes up through the gears ??