NEW OEM JOHN DEERE 48" 100 SERIES MOWER BELT GX21833 GX20571 GENUINE J/DEERE *NIB* JOHN DEERE TRANSMISSION DRIVE BELT M144044 LT 150 160 170 180 190 X300 340. THIS IS A TRANSMISSION DRIVE BELT USED ON THE FOLLOWING JOHN DEERE MOWERS. THIS BELT IS FOR HYDROSTATIC TRANSMISSIONS ONLY, AND PLEASE NOTE ANY SERIAL NUMBER RESTRICTIONS. IT FITS: LT150 LT160 LT170 LT180 LT190 X300 SERIAL NUMBERS ABOVE 040001+ X304 X320 X324 X340 X360