CTA Tools 5040 Timing Chain Wedge is used to properly setup and service engine timing on 4.7L PowerTech V8. Tool locks the timing chains against the hydraulic tensioners to prevent tensioner ratcheting and piston extension during service procedures. Compatible with Chrysler/Dodge/Jeep - 4.7L V8, including: 1999-2006 Jeep Grand Cherokee 4. 7L V8, 2006 Jeep Commander 4.7L V8, 2000-2006 Dodge Durango 4.7L V8, 2000-2006 Dodge Dakota 4. 7L V8, 2002-2006 Dodge Ram Truck 4.7L V8.