I HAVE A CHELSEA MODEL 410XUBOX-W4XK POWER TAKE OFF WITH A MUNCIE HYDRALIC PUMP MOUNTED ON IT. IT CAME OFF OF A 71 GMC TOW TRUCK I OWNED AT ONE TIME. IT WORKED GREAT BUT WOULDNT FIT ON THE FORD 5 SPEED TRUCK I WAS PUTTING THE TOW UNIT ON. I DONT KNOW HOW MANY YEARS OF CHEVY AND GMC 4 SPEED TRUCK TRANSMISSIONS IT WILL WORK ON. I HAVE BEEN TOLD IT WILL WORK A NUMBER OF YEARS . I'LL TAKE $200.00 FOR IT. THE PUMP IS WORTH WAY MORE THEN THAT BY ITSELF.