Buzzing noise from transmission mount
I have a 1999 4.2 liter F-150 with automatic transmission/overdrive two-wheel drive, 8-foot box.
There is a very loud buzzing noise that originates in the rear mount for the transmission. The noise is there only at low engine rpm as when I am at a stop light or maneuvering to park or turning a corner.
I tried wedging a wooden shim between a cross member of the frame and the mount and that seemed to quiet the noise but didn't stop it entirely. Not feeling happy about the shim and any stress it might put on things, I took it out.
I was under the pickup a week ago and loosened the two nuts that I think attach the mount, and using a pry bar tried slightly shifting the mount back and forth, left and right, hoping that would allow the transmission to find its correct position and maybe stop the noise. After retightening the nuts, the noise was still there.
I could squeeze under again and get a photo and try posting it here in hopes someone has an idea of what's wrong and whether I can do a simple repair or even replace the mount.
Meanwhile, I'd be very grateful for any tips or suggestions on how to handle this.