# Silverado build **URL:** \ **Category:** Builds\ **Created:** [July 10, 2013, 7:48am UTC](https://forums.speedlife.net/t/silverado-build/267380 "2013-07-10T07:48:30Z")\ **Posts on this page:** 1\ **Showing post:** 17
**Author:** ![JSEnclosures](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jsenclosures/32/6678_2.png) [@JSEnclosures](https://forums.speedlife.net/u/JSEnclosures)\ **Post date:** [July 11, 2013, 8:30am UTC](https://forums.speedlife.net/t/silverado-build/267380/17 "2013-07-11T08:30:17Z")
> [@Carnival Cruises????](https://forums.speedlife.net/t/carnival-cruises/53122/23): > > the front driveshaft will always spin regardless of it being engauged in 4wd or not. However if engauged the front and rear shafts should spin at the same speed. PJB is actually correct and the truck still has an electronic actuator in the diff that is probably bad. If you want I have an actuator from a newer truck that you could plug in as a quick check to verify functionality of all the circuits. If i remember correctly the plugs should be the same I read yesterday that if the 4wd light does not come on the cluster you can jump the wires on the plug that’s for the actuator if the light then comes on it’s the actuator gone bad. I will have to check it. I do not know if the light even comes on or not, I have not tried to put it in 4wd yet. it seems pretty common on these and a cheap fix, so fingers crossed. --- _[View the full topic](https://forums.speedlife.net/t/silverado-build/267380)._