I have a 1999 BlueBird with a Cummings and the owners manual says an AT545.
NAPA gave me a tranny kit (internal filter and pan gasket), part number ATP 17560. The gasket was correct, and the filter was identical, except the rubber grommet for where the the pickup-tube inserts into the filter was wrong. I was able to use the old grommet, and got the job done, but I can't do that forever. My grommet's inner diameter is about 0.7", whereas the one they gave me was much bigger. I will look into the Wix 58890
(or NAPA equivalent) and post my finding here eventually...
They also gave me the wrong external tranny spin-on filter. That was obvious by size, and the part numbers did not match. Don't remember what they gave me (the 1196 listed below sounds familiar), but Wix 51268 (NAPA 126
is the correct one.
They also failed to give me a correct oil filter or fuel filter. I got the numbers from the old ones. NAPA Gold 1619 for oil, and 3585XE for fuel. Glad I changed the fuel filter in their parking lot.
Funny, the spin on motor oil filter they list as a "hydraulic filter" and the spin on tranny filter as an "oil filter".