This is a New 17 tooth 700R4 TH350 drive speedometer gear for large speedometer gear housing hole. 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. 
Our Gears are the real deal!!!! They fit and function like OEM and are upgraded to surpass them by using better materials. We did our homework before we started reproducing our gears. WE ARE THE SPEEDOMETER GEAR STANDARD. 

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. 
We CAN help with any speedometer gear question!!
Kerry