Its a wr trans. 5 speed and 3rd gear was popping out. When I spit the cases, it broke the ears off 5th gear. 3rd gear on the wr is 22 teeth on the main and 25 teeth on the aux. shaft and 5th gear on the wr is 28 teeth on the main and 19 teeth on the aux. shaft. On a cr 250 trans. I have, 3rd gear is 23 on the main and 24 on the aux. shaft and on 5th its 27 onthe main and 20 on the aux. shaft. My question is how much differents would it make if I put 3rd and 5th cr's gears in the wr's trans. 4th gear is the same in both. Should I buy the 2 , 3rd and 5th wr gears or put all cr gears in. Any help, if anybody has 3rd and 5th gear for a 1973 wr 250, let me know and how much. thanks