Yes, I also got the oil seal from the dealer. With those tyres and that diff (should be a 3.62) you can use the worm wheel from a DOHC MT75 together with a 23 teeth cog (blue cog if I remember correctly). As standard the DOHC has a white/yellow 22 teeth cog fitted, but I found the speedo overreads as standard and the 23 teeth cog made it perfectly when I still had a 3.64 diff.