I have a GT car that has a Hewland DGB transmission. I am new to Hewlands and dog boxes - my prior experience is with older Porsche transmissions. My DGB seems noisy to me when the car is idling in neutral. It sounds like rattling metal, and got my attention quickly the first time I started the car. The noise goes away when I disengage the clutch (neutral or in gear), and I do not hear the noise when I am driving the car at any speed. I do not hear grinding, banging, or other noises.
I asked a mechanic who worked on this car previously, and he said he thought it was normal based on what I was describing. I'm wanting to get additional opinions. Thoughts?
Scott