Upsizing wheels

[Baby Blue]

Hey Guys, I'm new to the forum so please bear with me as I muddle my way through this. I have a 2019 1500 SLT 4X4. I added a 2" level kit and got a hold of a set of Sport 20" X 9" wheels wrapped in 35X12.50r20 Toyo AT3 tires. This truck is my daily driver. I'd like to start a discussion on what you guys think about speedo calibration. I use the truck for work and get paid by mileage, so it's important to me to be accurate on the odometer. Any thoughts?

 

[MADDOG]

Welcome to the forum.

AlfaOBD might be your answer. There is a lot of information in the 4th & 5th Gen DIY sections here regarding the tool.

 

[Baby Blue]

Thanks, I've heard of AlfaOBD but am not familiar. I'll look into it.

 

[kurek]

AlfaOBD and jscan can both do it. Just like android and iphone, people divide into camps over it I think jscan is easier to use.

 

[Baby Blue]

Great! Thank you! I'll check them both out!

 

[Baby Blue]

After a little research, looks like 2018+ Rams have an SGW to block third party software, and I'll need a bypass cable. Can anyone elaborate/suggest a particular cable?

 

[Tim7139]

After a little research, looks like 2018+ Rams have an SGW to block third party software, and I'll need a bypass cable. Can anyone elaborate/suggest a particular cable?

I use the ones made by a forum member here.

Security Module Bypass | KaodTech

If you have a 2018+ RAM and would like to perform diagnostics or make changes to the modules of your truck using tools like AlfaOBD or AutoEngenuity, this bypass is for you.Does this allow access to all modules?It has been tested connecting to the BCM and RFH. Since it bypasses the security...

www.kaodtech.com

 

[Baby Blue]

Thanks Tim7139. I haven't visited the forum in a while, but since then, I've purchased the OBDlink MX+, The KAOdtech bypass cable, and AlfaOBD software. After a short learning curve, It's already more than paid for itself by making only 2 mods, if you calculate about $150.00 per trip to the dealer to make your changes. I have calibrated my speedo to dead nuts on with the bigger wheels and just today installed and enabled the Mopar integrated trailer brake controller! This setup is soooo cool! I can't wait to find another opportunity to use it again!