Does anyone have their trucks tuned? Specifically with the SCT x4, but other tuners are welcome to share their opinion. Curious about what experiences people have had with them. Also, I thought our 4wd was only able to initiate if driving below what like 51 or 52mph? I switched it out going around at least 58 and it initiated.

 

Use the search function for tuner info - tons of threads on this.
Happy hunting.

The 4wd will engage at any speed AFAIK, and can be disengaged at any speed, as high as 115mph in my experience.