94 k1500 350 vibration

[1976gmc20]

Originally Posted by dmkilgo

Update: 4 wheel drive is fixed. Just wired it back up and all is well. Still haven't had time to install new u joints. The wife keeps assigning me other tasks. Need to get it done though. Deer season will be here soon...

Those actuators are troublesome

I took out the actuator and stuck a piece of 3/4" PVC pipe about 1" long on the end of the plunger, and then reinstalled the actuator to semi-permanently lock in the front axle.

My pickup is only used for a firewood truck and on local roads, but you can also get a "Posi-Lok" cable control which eliminates all the wiring and the thermal-hydraulic actuator.