Jim, The part number for the gear you are looking for that you have listed in the WFM Wanted to Buy section is not correct. I will send you an email with the correct (vintage) Tecumseh/Peerless part number for this gear (not posting it here as there are currently 4 listed on Ebay and don’t want to potentially increase your competition from other WFM members). This gear is also shown as being available via some of the online parts suppliers that I have used in the past, including outdoordistributors.com and partstree.com. Be advised that Peerless was owned by
Tecumseh Products Corporation back when our tractors were being built but the Peerless division was sold off to
Husqvarna Outdoor Power back in 2009. I do not know if there are currently any plans to update the part numbers but it appears that the Peerless parts are still being sold under the old Tecumseh part numbers.
Regarding your original question, as to what specific model transaxle you are working on, I believe it to be a model 2001. Please refer to my post listed below as to how I reached this conclusion:
http://www.wfmachines.com/discus/messages/17/227972.html#POST247896
Regarding the other questions as to what gears/parts will interchange between different transaxles, I would advise any interested parties to get familiar with JDParts (
www.jdparts.com) and look up the particular part in question and then use their
Where Used Search option to see where all a particular part is used. In Jim’s case, the JD Part number for the gear he is looking for is M40370 and was used in the early JD model 110 3-speed transaxle but also in the 3-speed transaxle used by the model 60-70-100 lawn tractors (which is a Peerless model 1206).