A guy I know was using a 200 4r in his old Bonneville and pulled it for a heavy duty th400. I have a chance to buy the 200 4r So I copied the code from the metal tag bolted to the right rear. 261-1T82CR0446 It's the CR that doesn't seem to fit. Most of the codes use 3 letters there. I found a few 2 letter codes but not CR.