(Used) 2014 Peterbilt 320, TRANSMISSION SHIFTER ASSEMBLY- Type: Dash Mounted, Button, Make: Allison, Trans Model: 4500RDS, Part Number: 29551495. Serial Number: 0019410. For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY. ELKTON, MD 21921.