If you're in need of replacing the pump bushing in your Allison 1000, you need this tool, simple as that.This double sided tool allows for a simple removal of the pump bushing on the Allison Transmission without damaging the pump body. Then, once you've got the old bushing out, simply flip the tool over to install the new bushing square and at the correct depth every time! Machined from 6061 Aluminum and hard coat anodized to ensure a long life. Can be used with press, or compatible with Merchant's driver handles