One New Aftermarket Replacement Splined Reverse Transmission Gear that Fits Massey Ferguson Tractor Models: 290 UK (W/ 12 SPEED SYNCROMESH TRANSMISSION), 375 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 390 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 398 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 399 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 4225 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 4235 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 4243 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 4245 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 4253 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 4255 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 4263 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 4270 (W/ 12 SPEED SYNCROMESH TRANSMISSION), 670 (SN L131041> W/ 12 SPEED SYNCROMESH TRANSMISSION), 690 (SN L131041> W/ 12 SPEED SYNCROMESH TRANSMISSION), 699 (W/ 12 SPEED SYNCROMESH TRANSMISSION)

Dim A (1) 38 / 38 Teeth