Do not overlook to re-seal the gearbox with RTV soon after you have located the appropriate blend. Even though they are named “gaskets”, they will not likely seal your gearbox on their own.
If almost everything seems regular, attempt modifying the gear-mesh. This is completed with the mylar “gaskets” that sit amongst the main gearbox case and the enter/output caps. Try adding or getting rid of some of these spacers till your gears have approximately 1/eight”-1/four” of free of charge perform. Experts can buy replacements ($1-2) in various thicknesses, but we advise the quick and soiled strategy of chopping your very own out of a sheet of mylar.
“Groaning”, “creaking”, or “popping” all seem sort-of similar in excess of-the-phone. The best thing to do is to disassemble your gearbox and consider a search at the gears and bearings. The concern will usually present itself in the way of damaged/missing equipment teeth, toasted gears (like that image on our property web page), or blown bearings.
My Gearbox is Groaning/Creaking: