To prevent damage to a newly installed 10R1000 transmission, the oil cooler and lines must be checked for an adequate oil flow rate before the transmission is operated. GM-45096-85 is an adapter block with quick connect fittings. The block attaches to the cooler lines at the transmission. The previously essential GM-45096 Transflow machine is then used to perform a flow test to ensure that no restrictions exist in the lines or the cooler and that the flow rate meets GM specifications.