WTB Neutral Idler Gear Assmbly (Page 1/1) FastCassius OCT 30, 08:32 PM Good Day All! I recently starting having issues with my M17 Muncie 4 Speed Transmission. The transmission shop said that the transmission needed a replacement neutral idler Gear Assembly and a oil seal. It does not look like there are any options on the market for that particular part either used or NOS. I was wondering if anyone had those parts in good working order from a transmission that has other issues and wanted to part with them. Please let know. Thank you and God Bless. FastCassius OCT 30, 09:09 PM My apologies all. The part I am after is the reverse idle gear assembly.