I know this is the F-150 forum, but I figured I try here as well as the Expedition forum.

2006 Expedition with 73000 miles. Just started hearing a whistle-type sound from the tranny area when the truck is in gear, forward or reverse. Seems to tune itself with engine RPMs versus highway speed. Can't hear the noise in park or neutral. Tranny shifts fine, no jerking, no slipping, nothing besides the "noise". If not for the noise, I wouldn't even think anything is wrong. Been doing it for about a week.

Any ideas? Other info I've read on-line seems to suggest torque converter. I was planning on getting rid of it soon anyway (nickle-dime stuff is killing me!), so I may just turn on the air and turn the radio on low when I trade it in. If you didn't know any better, someone might actually think it's normal.

If I were to fix it (assuming it is torque converter), any idea what it costs to replace at a shop? I believe tranny has to be R and R'd to complete job. Would this be a good time to replace a flywheel as well? I get the dreaded starter grind every now and then that a new starter didn't fix (though it did make the problem a lot less frequent). I figure if the flywheel is dinged, might as well do that at the same time.

I did have the fluid flushed about 3 months ago.

Thanks!

 

My 04 F150 had the same exact symptoms and it was the TQ. I dont know what it would be to fix it, mine was fixed under warranty.

 

no idea what the noise is, but if the tranny is out you might as well replace the flywheel if needed

 

check the rear end for fluid.they whistle/whine when empty. and noises travel all over under vehicles making it hard to determine place of origin

 

Well mine was the TC, whine in a drive gear, nothing in N or P. They replaced the TC and everything was fine.

https://www.ford-trucks.com/forums/7...elerating.html