I have an MtH Erie 0-8-8-0 PS3. Product #20-3442-1E. The front electro-coupler is broken and needs to be replaced. I know they come in 2 lengths, 44mm and 51mm. (Pretty sure the one i need is the 44 but please confirm). If that is correct, I have found 2 MTH part #s for this: DD-0000062 and DD-00000-32. Is there a difference in these? If so, which can or can't I use? Will they both work on a PS3 engine? I have found the -62 which I can get pretty quickly. Thanks in advance for the help.
32 is the long one and 33 is the short. Does look like MTH has add some new part numbers for coupler and I am not sure why.