My dad has a broken steering sector shaft on his l235 1980s model l235 kubota tractor. I found the shafts but would rather replace the whole box. Cheap ones on ebay and Amazon say they fit l 175,l 185,and l245 but don't specifically list the l 235. My question is does the L 235 have a different steering box than the rest of the models? Or will the after market boxes fit the l 235 tractor.