The ones I got are the cast versions not the welded and seem like they will last the life of the tractor. They work extremely well and made switching implements a breeze. I have a couple friends that have used my tractor since I installed these and they were able to use them with no instruction and highly approved of them! My driveshafts had plenty of length and so did my upper link to account for the small change in lower link length. I don't understand why some people complain about their driveshaft and upper link length, it's not in the easy change's ability to know about every tractor. These are items every tractor owner should know to check and how to compensate for differences.
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