1997 FORD F150 4WD WON'T WORK

  • Tiny
  • JasonStith
  • 1997 Ford F-150

Drive Train Axles Bearings problem
1997 Ford F150 V8 Four Wheel Drive Automatic 97,800 miles

A while ago my 4wd would only work sometimes. Now it doesn't work at all. I found out that there is an actuator that you can zip tie down when you need to put it in 4wd. I think the problem is that the hubs won't lock, because they're vacuum actuated. Do you think I have a vacuum leak somewhere that might be causing this? Would it be hard to install manual locking hubs?

Tuesday, July 20th, 2010 AT 11:58 AM

3 Answers

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,410 posts

It could be either of the two. If you have electric shift 4wd, start by checking if the actuator on the transfer case is getting power. If it is, remove the actuator and confirm that it is working. If that is okay, then you most likely have a vacuum leak to the front axle.

Check that and let me know what you find.
Joe

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Tuesday, July 20th, 2010 AT 10:27 PM
  • Tiny
  • JasonStith
  • Member

The actuator is working. If it is depressed after I use the switch to engage the 4wd then the 4wd does work.

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Tuesday, July 20th, 2010 AT 10:50 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,410 posts

Check for vacuum leaks at the front axle. If the actuator is good, then the axle must not be engaging.

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Wednesday, July 21st, 2010 AT 12:03 AM

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