Why run an Allison Cat filter conversion kit?
If you've been spending any time on the diesel forums or hanging out at the local shop, you've probably heard someone mention an allison cat filter conversion kit as a must-have upgrade for your transmission. It's one of those modifications that seems almost too simple to be effective, but it's gained a massive following for a reason. Basically, you're taking the standard spin-on filter on your Allison 1000 or 2000 series transmission and swapping the mounting stud so you can run a much larger, high-efficiency Caterpillar filter instead. ...