XT1 tranny

[hoopharted]

3 year old XT1 ST54 tranny blew out , when i say blew out , i mean it blew a hole outward , no noise, no warning , just stopped moving , thought i broke the drive belt , no it was on , then thought it hopped the pully , nope , then i noticed the oil under the tranny , hole big enough to stick 2 fingers in and the innards are all gnarled up inside

bought a new mower because i cant not cut my grass for a month , so i have questions

i know the X2 and i believe the GT enduro all use the same chassis , are the transmissions the same as the GT and X2 or are the beefier and if so since they share the same bones can i upgrade to the heavier tranny assembly

if i go up one size on tires front and back will that cause added stress to the tranny , i still have the stock tires but they are crap , i punctured a front with just a piece of gravel in the driveway kind of crap so if im buying new i would like to go a size bigger front and back

are the trannies a known issue or did i get a rare/uncommon failure , wasnt for lack of oil given the puddle it left , something just let go and stripped everything into gear soup

im a tad worried , i have a GTX 1054 i used for 13 years , the mower deck finally wasnt serviceable anymore so i figured i would just use it as a tractr for smaller stuff that the New Holland is just a over kill for and bought the enduro , cuts beautifully , but a 3 year tranny life span isnt exactly appealing , if it was a fluke thing i can put it behind me , it happens , nut know i have two lol