3L80HD. 35 dimples. Units are built w/diesel bearing and are to be used in the following diesel applications only: 270, 275, 540 Allison Diesel & Turbo 400 Diesel.;
Be sure to ask 6L80 or 6L90, many codes cross, but units have different hubs.; InterChanges: Can use a 4646, will have a HUBSC hub rework surcharge added to order