The tailshaft was bought new from Hardy Spicer for $1700, where the one from Ford was quoted just under $3000, you can see the reason why I bought the Hardy Spicer one. Also, the Hardy Spicer should at least be the quality (if not better) than the OEM one and the centre bearing is serviceable as well. The tailshaft is still under warranty (bought 6/10/2021) so they are sending a new part to fitted. Like I said in my post, there must be some way of stopping the diff housing from twisting, causing the failure of the rear CV joint. Hardy Spicer said this is an issue with lowered Falcon utes, but mine is not lowered, but was towing a light caravan which dropped the rear of the car about 10 mm.