CATERPILLAR TH35-E81, SURPLUS NEW DROP BOX, FITS: C9, C11, C13, C15, and C18 ACERT engines, NEVER USED 2 WHEEL DRIVE TRANSMISSIONTH35-E81 OIL FIELD DROP BOX TRANSMISSION 2WD, AR#321-1332SMS00313 & 319, 3211332 $29995.00.LAST TWO IN STOCK.MAKE US AN OFFER WE CAN'T REFUSE!, Transmission, NEW