Adapter is only 1.625 inch in length;Includes a GM VSS kit incorporated within;Exclusive use with the late Model 4L6; California Residents: WARNING Get shorty again! We have just released the super short 4L60E to Atlas 4 speed transfer case adapter assembly. The adapter is only 1.625 in length and includes a GM VSS kit incorporated within. This adapter assembly is for exclusive use with the late model 4L60E with a removable bell housing and includes a new 300M billet output shaft. We also include a heavy-duty transmission mount that bolts to our adapter housing. This adapter assembly can also be used with the Jeep New Process 231, 242, 247, 249, and 2410 Rock-Trac transfer cases.