Notices
1999 - 2003 7.3L Power Stroke Diesel  
Sponsored by:
Sponsored by: DP Tuner

4x4 Auto Doesnt Work

Thread Tools
 
Search this Thread
 
Old Jan 7, 2007 | 11:25 AM
  #1  
spunout's Avatar
spunout
Thread Starter
|
Senior User
Joined: Jan 2006
Posts: 103
Likes: 0
4x4 Auto Doesnt Work

I have an 02 F250 CC 4x4 PSD with manual hubs. On the hubs it says auto and lock. With it set to auto the 4 wheel drive doesnt work if I turn the hubs to lock then it works just fine. I may be wrong about this but shouldnt 4 wheel drive work if the hubs are set to auto as well as lock?

If so what could be the problem?

Thanks
 
Reply
Old Jan 7, 2007 | 11:32 AM
  #2  
Muktown's Avatar
Muktown
Posting Guru
Joined: Jan 2006
Posts: 1,605
Likes: 1
From: Elkhorn, WI
Originally Posted by spunout
I have an 02 F250 CC 4x4 PSD with manual hubs. On the hubs it says auto and lock. With it set to auto the 4 wheel drive doesnt work if I turn the hubs to lock then it works just fine. I may be wrong about this but shouldnt 4 wheel drive work if the hubs are set to auto as well as lock?

If so what could be the problem?

Thanks
yes the 4wd should work in the auto position but many people have problems with them. in the auto position the hubs are vacuum oerated and if there is a vacuum leak anywhere in the system the hubs will not operate properly. mine also dont work in the auto position for me its not a big deal to get out and turn them. its a convenience when they worked but at least when i get out and turn them manually i know its in 4wd instead of just hoping
 
Reply
Old Jan 7, 2007 | 07:06 PM
  #3  
JOE-M's Avatar
JOE-M
Elder User
Joined: Sep 2004
Posts: 851
Likes: 0
From: N. Georgia
Yep, it should work in the auto postion. There are 3 questions you'll need to answer for us. First, with the hood open if you turn the key on, without starting the engine, does the vacuum pump come on and run for a minute or so and then turn off? Second, With the engine running, if you have the air controls in the A/C postion and then switch into 4wd, does the air system default to the defrost postion? Third, do you want help fixing it or do you want to get out and lock the hubs everytime you need 4wd?
Joe
 
Reply
Old Jan 8, 2007 | 01:04 AM
  #4  
kbeefy's Avatar
kbeefy
Cargo Master
20 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2003
Posts: 2,332
Likes: 442
From: Eastern Washington
Originally Posted by JOE-M
Yep, it should work in the auto postion. There are 3 questions you'll need to answer for us. First, with the hood open if you turn the key on, without starting the engine, does the vacuum pump come on and run for a minute or so and then turn off? Second, With the engine running, if you have the air controls in the A/C postion and then switch into 4wd, does the air system default to the defrost postion? Third, do you want help fixing it or do you want to get out and lock the hubs everytime you need 4wd?
Joe

Great post Joe!
The three ? of ESOF. Should be a newbie guide! Put it with the 'hissing truck poll'.
 
Reply
Old Jan 8, 2007 | 08:16 AM
  #5  
spunout's Avatar
spunout
Thread Starter
|
Senior User
Joined: Jan 2006
Posts: 103
Likes: 0
Originally Posted by JOE-M
Yep, it should work in the auto postion. There are 3 questions you'll need to answer for us. First, with the hood open if you turn the key on, without starting the engine, does the vacuum pump come on and run for a minute or so and then turn off? Second, With the engine running, if you have the air controls in the A/C postion and then switch into 4wd, does the air system default to the defrost postion? Third, do you want help fixing it or do you want to get out and lock the hubs everytime you need 4wd?
Joe
I will check out those 3 things today or this evening. I believe the vaccum does come on or something does and I have always wondered what it was. Yes I would like to fix this problem.

Thanks for the input so far!
 
Reply




All times are GMT -5. The time now is 10:01 PM.

story-0
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-1
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-2
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-3
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-4
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-5
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-6
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE
story-7
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!

Slideshow: Ranking the 5 things owners love about their Super Duty and 5 things they don't

By Joe Kucinski | 2026-04-29 16:36:49


VIEW MORE
story-8
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!

Slideshow: Ranking all 12 Ford truck engines available in 2026.

By Michael S. Palmer | 2026-04-22 13:32:20


VIEW MORE
story-9
The Best F-150 Deal of Every Trim Level (XL through Raptor)

Slideshow: The best Ford F-150 deal for every trim level (XL through Raptor)

By Joe Kucinski | 2026-04-21 15:59:01


VIEW MORE