I have a 1990 loyale turbo wagon with auto trans. I sent it in to the local high school shop for trans service (filter and fluid) but when it was finished it now has a noise coming form the trans that sort of buzzes or ticks. this noise varies a little in character with engine rpm... supecting an air leak in the pick-up tube we took the pan back down and installed a new o ring on the filter or fluid pickup tube but that didn't fix the noise?? any body got any ideas. this loyal only has 77,000 on it and was running pretty well before the service

One thing that comes to mind is the time I dropped something down into the bellhousing and the flywheel teeth would make it buzz.

Hard to say really without actually hearing it. But I would say it's coming from the torque converter, and it's, cavitation. Happens sometimes when doing fluid changes. The TC loses some fluid, and doesn't re-fill completly, leaving a small air pocket in there. The vanes inside of the TC are spinning thru this air pocket, hence the buzzing. It should go away on it's own, may take some time to do so though. Can't say how long as it is up to the tranny itself. I've had it clear up in a day, and other times it takes like a week or so. Not a whole lot you can do, other than drive it. Need to have fluid circulating so it can expell the air.

Hard to say really without actually hearing it. But I would say it's coming from the torque converter, and it's, cavitation. Happens sometimes when doing fluid changes. The TC loses some fluid, and doesn't re-fill completly, leaving a small air pocket in there. The vanes inside of the TC are spinning thru this air pocket, hence the buzzing. It should go away on it's own, may take some time to do so though. Can't say how long as it is up to the tranny itself. I've had it clear up in a day, and other times it takes like a week or so. Not a whole lot you can do, other than drive it. Need to have fluid circulating so it can expell the air.

 

Tom thanks for the info the noise does resonate through the whole trans could be originating in the converter when draining the fluid for the second time we noticed that it was a little bubbly. I will try the drive it method and see if that noise goes away is there any danger to running the trans with the cavitation? won't eat up the converter will it?

In theory, cavitation isn't good... I haven't had any tranny problems related to it, and I've owned many auto trans over the years.

 

Might give a call to a local tranny shop, see what they say about it. Maybe they can tell you a way of getting the air out. I don't know of one myself, other than driving the vehicle.