Product Description: 1. Wide Application: Work for John Deere 4024, 4039, 4045, 4239, 4276, 6619, 6059, 6068, 6076, 6081, 6090, 6105, 6125, 6135, 7400 and 7600 Tractors. Suitable for engines with 129-tooth flywheel ring gear and a 29.9 mm (1.18 in.) flywheel housing guide bore diameter. 2. Direct Replacement: Alternative to OEM JDG820, formerly JDE81-1. The JDG820 may be used if JDE81-1 is not available. 3. Durable Material: Made of quality steel, using top of the line machining and measuring equipment to ensure each part is manufactured to OEM quality standards and specifications. Improved its strength, durability and ensure high performance. .