Engine/Transmission (1994 - 1998) Speedometer gear/Bigger tires

[RON'S RAM]

I Have a 1997, 2500 4x4. I replaced the stock tires with 285/75/16. Does anyone know the correct part number for the speedometer gear that I need for the speedometer, and odometer to be accurate again? I'd rather find out here, than go to the dealer and have the parts guy guess at it. Thanks, Ron...

 

[Missouri Mule]

Fritz's web (member) is supposed to have the difference in percentage between tires sizes compared to original size truck came with.

http://dodgeram.org/

 

[RON'S RAM]

Thanks, but I couldn't find what I was looking for there.