I got some 35" tirs on my truck, and at 65 to 75mph, it shakes. I brought it in twice to have the tires balanced, and still no luck. Tires were zeroed out on the balance machine, which is good. Why am i still getting shakes?

I changed my speedo using superchips, and now my cruise control doesnt work over 50mph. Anyone know about this one?

 

You have a 2005+ Dakota? If yes, where did you get a Superchips programmer for it????

 

nope, 05 ram 1500

 

"nope, 05 ram 1500 "
You might want to try in the 3rd Gen Ram Section.

 

The cruise control on the 3.7/4.7 is controlled via use of a cable, vaccum servo, and the PCM.
The cruise control on the 5.7/5.9 (diesel) is fully electronically controlled, no cable or vaccum servo.

I am not familiar with this plug-n-play chips everyone has, but that could have definitly effected it.

As for the shaking, well, maybe if you post in the Ram section, someone can point you in the right direction. My only guess would be alignment, worn-out front end parts, or un-evenly worn tires.