He said that he was indeed looking for a SM-420. Now my question gets to a new level. My truck is a 3/4 ton and has an enclosed front propeller shaft. When that is removed from the back of the transmission, it would appear that for the transmission to be used for "open drive shaft" applications, it would need a different universal front flange and oil seal. Am I correct in assuming that the oil from the transmission presently flows back and fills or lubricates the enclosed front propeller shaft, or is the rear oil seal the same for all of these SM-420s and all that would be needed would be a different universal front flange?
Thanks
John
