adapter #AS-0404 is commonly used on Atlas conversions to alleviate fitment
issues caused by variations in transmission output shaft lengths. Many
transmissions have positive “stick outs” on their output shafts in relation to
the edge of the rear tailhousing or adapter. This causes the output shaft to be
too long; therefore, causing a bottoming out effect when installing an Atlas.
For some applications, the output shaft can be trimmed back. There are however
several applications where there are simply not enough splines on the main
shaft. The #AS-0404 is a 1” spacer to be used where trimming is not desired or