Do I need any hoses or clamps to install this?

This radiator assembly comes as-is. You'll reuse your existing upper and lower hoses if they're in good condition — inspect them before installation. If hoses are cracked or stiff, plan to replace them at the same time.

Will my old coolant work with this radiator?

Your existing coolant should be fine if it's still within its service life. When you drain the system for installation, it's a good opportunity to flush everything and refill with fresh coolant — especially if the system hasn't been serviced in a while.

What if the transmission cooler lines leak after I install it?

Start by checking all connection points where the transmission lines meet the radiator — make sure they're snug. If a line itself is cracked or damaged, it likely came that way and qualifies for a return. Test-fit first and verify before you commit coolant to the system.