This is a New Set of one each 34, 35, 36, 37, 38, and 39 tooth Speedometer driven gears, retainer, and housing. Part numbers 9774413 9780387 1359270 1359271 1359272 1359273 12338069 22512340. This fits most GM and BOP transmissions with a 2.08" (inch) speedometer gear housing hole and 1.18 diameter output shaft. Here at American Hot Rod Solutions we have many other gears in our other listings too. 

If you need help figuring the correct gear please let us know and we will be happy to help you.