How to add cruise to truck built without?

[tadkingnkc]

I already have a multifunction lever switch with cruise control compatibility. What other items are required to convert a vehicle without cruise to make it functional? Forgive me if this has been discussed but I cannot find reliable info. Thanks.

 

[CalSgt]

Not sure what all is needed to do it with factory parts except the Servo box and cable, but Dakota Digital sells complete kits for about $400

 

[Doppleganger]

Check out Rostra 250-3357. Its what I'm going to use.

 

[Grit dog]

And this great forum strikes again!
Literally 2 viable options from knowledge helpful folks in the first 2 replies!

 

[tadkingnkc]

Check out Rostra 250-3357. It’s what I'm going to use.

Doppelgänger, that’s the part I already have on hand. I am needing to know what else I need to install it on a truck that did not have factory cruise. I have heard that I need some sensor, servo, and throttle link but cannot find anything detailed to tell me.

 

[Doppleganger]

Doppelgänger, that’s the part I already have on hand. I am needing to know what else I need to install it on a truck that did not have factory cruise. I have heard that I need some sensor, servo, and throttle link but cannot find anything detailed to tell me.

Sorry - was in a hurry. This is what goes with it.
https://www.rostra.com/universal-aftermarket-cruise-control-by-rostra.php

 

[75gmck25]

Major parts are
- switches on the turn signal stalk to turn on/off, set speed, etc.
- controller box with the electronics; usually under the dash
- vacuum servo with cable in a smooth loop running to the carb linkage; adapter/bracket to connect the cable to the linkage; usually mounted on top of drivers side inner fender.
- Almost forgot the speed sensor. Usually they are mounted inline with the speedometer cable. Some of the old inexpensive add-on cruise controls used two magnets and a sensor near the driveshaft. Magnets are glued on the driveshaft and eventually come off - not a great solution.

Most of these throttle connectors are designed so they can pull, but not push the throttle cable. That allows free back and forth movement of the throttle when cruise control is not engaged. Sometimes the last section of the cable is a beaded chain like you have on a lamp pull-chain.
- electric switch on brake pedal to turn off cruise control when braking
- vacuum switch for brake pedal. This switch dumps vacuum from the servo so it immediately releases the throttle when you brake.

 

[Matt69olds]

I used the Rostra universal cruise kit on my 81 GMC. I used a speedo head from a truck with factory cruise, you also need the speed buffer ( greed box with a small ribbon cable) that plugs into the speed sensor.

You also need the matching plug for the factory cruise lever.


Depending on what year truck you have, the speed sensor parts might already be there.

If you need some pics, I can take some tomorrow

 

[TPISly-C10]

off topic but...so easy to install cruise on LS swap...wish can be easy to retro fit in oem gaz engine style

 

[DoubleDingo]

I was going to say Rostra, but I see it was already mentioned. I will be using Rostra on Crusty Biscuit when It get it going again.