Small Engines (Lawn Mowers, etc.): Snapper Walk-Behind Transmission INOP, pinion gears, differential gear

Question
Snapper model P216012 transmission failed last fall and during the winter I disassembled it and began trouble-shooting.  Findings were: input gear(7050767) turns but does not engage differential gear(7012495), input gear bearing(7011767) badly worn and fell out of seat but all teeth on all gears are intact and in excellent condition.

I reassembled with new input gear bearing and noted it did NOT fit tightly in seat, relubed with Snapper grease and reinstalled.  No improvement noted!  FYI, the mechanic at the local shop where I get parts told me I should do the repair because his labor rates would preclude economical repair or I could purchase a complete new transmission assembly(7053945).  Comments/suggestions?  Thanks, Bill

Answer
Hello Bill:

>>Sorry for the Delay. This Question was Located in the Question Pool and I can Only Answer Questions from the Question Pool when I am Not Answering Questions here or at the Other Site I Answer Questions at.
>>Did you Ping the Housing Around the Bearing when you Replaced it to Prevent the Outer Bearing race from Spinning in the Housing?
>>How Loose was this Bearing in the Housing?
>>A Small Amount of Play between the Housing and the Outer Race of the Bearing will cause the Input Shaft to Jump the Teeth when under a Load.
>>You can View a Breakdown of the Mower at this Site Addy; http://www.snapper.com/manuals/ . Enter your Model Numbers (P216012) in the Box Provided and Click Find Manuals.  Select Illustrated Parts List from the Manual List Provided. Now Download the Manual for Online Viewing.
>>Did you Inspect the Pinion Gears for damage?
>>I Always Turn the Input Shaft by Hand before Assembly of the 2 Halves to make Sure the Transmission is Operating Correctly before Installing it back into the Mower.
>>The Transmission is Approximately $192.00us Plus Shipping and Handling.
>>If you Hit a Snag or this Does Not Correct the Problem,  I Hope to be Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Happy. Thanks.

Good Luck

Respectfully

John

PS: I am Allowed to Answer 5 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Comments and Ratings are Greatly Appreciated. Thanks.

Respectfully

John