Quote:
Originally Posted by JBrown925
Nice. Thanks for the reply. My van is a 2019 Express 3500 Extended 6.0. The passenger version. I have no RPO sticker that I can find so I don’t 100% know my ratio. 6th gear is really low in the rpms so I’m just assuming it’s not a 4.10. Did you end up recalibrating the speedo and all that? Or just slap it all together and let’er eat?
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Welcome.
I reprogrammed the computer for the tire size with a Hypertech speedometer calibrator.
The low rpm in 6th will also be impacted by the trans gear. I assume you could find out through a dealer with the VIN. Edit: I see Whit commented on the dealer as well.