The reverse idler is in a difficult place to get to as the pin goes into the idler shaft through the case. No direct access to the pin.
The reverse idler is the first gear to be installed for assembly and the last to be removed for disassembly. The pin is driven all the way into the the shaft and the shaft is then pushed out through an expansion plug on the front of the trans. Hopefully you can get it clean enough to seal it up without having to disassemble the trans.
Fred
