In Reply to: Re: Gear / transmission growling noise posted by Ron on October 25, 2022 at 19:35:51:
I believe, the early 9N's ran straight cut gears and by mid '39 they were gone.
I could be wrong.
If the noise goes away or diminishes with your foot on the clutch, trans main input shaft bearing. If noisier with foot on clutch, clutch release bearing.