Humming noise from an AOD transmission
 

Hey all! Thanks for all your help during the installation of my AOD transmission into my '67 convertible. Now that it's all bolted up, I decided to actually start the car back up! It started up fine, but after about 5 minutes there came a regular humming noise from the transmission. It increases in pitch as I press on the accelerator, and deepens in pitch when I put the tranny in gear. any idea what's wrong? I checked the clearance of the torque converter bolts against the backing plate, to make sure they weren't rubbing

Bubba,
Does it always take a few minutes to warm up before you hear the noise? I do not have the AOD but on my FMX it had the same problem and it turned out to be the torque converter.

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69 351W Sportsroof deluxe

Clark, It happens right from the get-go, as soon as the engine kicks over. It continues as long as the engine runs.

The only other item I can think of is maybe your starter is causing this. Have you looked at it and the teeth of the fly wheel? It's a long shot but what the hell.

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69 351W Sportsroof deluxe

Clark, the starter and the flywheel seem to be meshing OK. Another friend told me to try and drive it, to see if that would help things. I got it out on the road, but couldn't get much past 30 mph. The old Mustang shop manual says this could be a problem with the torque converter, which was your original idea. Any thoughts, with this new info?