Hey, I don't know how much coincidence it is with the Friday the 13th thing. But yesterday was the first time in ages I managed to get my S-10 Blazer stuck up to the axles in mud. Had to call for help to get pulled out. For whatever reason, the four wheel drive isn't engaging. (OOOH, this is gonna be expensive!)
I tried four wheel high, and four low. Spun the rear wheels in the mud, but the front drive didn't engage. Woulda been nice if it had, I'd likely been able to drive myself out.
The truck is a 1989 model. 4.3 engine, 265 K miles.
I mentioned this to a friend of mine I visited on the way home. He reached under the battery tray, and had me pull the four wheel drive. And the plunger on the vac actuator did its thing. I think the vac actuator pulls a cable.
Three or four years ago, the front gearbox was a mess, and I had to have it replaced with a used one. And then a year or so after that, the front drive was partial engaged, and making awful noise. The repair shop had to replace the cable (had a used one, off the replacement gearbox I'd had put in). and they had to dealer order a spring and clip to put on the end of the cable.
Anyone out there have experience? Is there some common part that breaks or some aftrmarket cable to activate the 4WD?