Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 2007+ Expedition & Navigator
Sign in using an external account
Register Forgot Password?


2007+ Expedition & Navigator 2007, 2008, 2009 and 2010 Ford Expedition and Lincoln Navigator

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 02-09-2008, 12:15 AM
nebmike's Avatar
nebmike nebmike is offline
Senior User
 
Join Date: Jun 2007
Location: Sterling, Colorado
Posts: 258
nebmike is starting off with a positive reputation.
Control Trac 4-Auto Questions

Can someone explain to me (in a more technical sense) how the 4 auto feature works, mechanically? Is it a geroter based system, or electric, or...???

The info says it "transfers torque where needed"... does that mean it runs the front end always in addition to the rear end, or can it run the front end to the exclusion of powering the rear like some AWD set-ups?

I understand how the Jeep transfer cases work with the all-time feature in the Selec-Trac and the geroter set up in the Quadra-Drive... I'm just not familiar with exactly how the auto feature words in the Ford. I know it engages much more quickly than the Quadra-Drive (geroter) in my old Grand Cherokee.

Thanks in advance!!!
__________________
Mike
---------------
'11 F350 Lariat FX4, Crew, SB, 4x4, 6.7L, Camper Pkg
2007 Laredo 315RL 5'er, 35', 11.5k, Onan 4k

Last edited by nebmike; 02-09-2008 at 12:32 AM.
Reply With Quote
  #2 (permalink)  
Old 02-10-2008, 09:20 AM
08LTDEL 08LTDEL is offline
New User
 
Join Date: Feb 2008
Posts: 20
08LTDEL is starting off with a positive reputation.
It like, does different stuff to make it work and then the wheels go around and uses a computer or something smarter than the driver. That is the technical answer. Glad I could help.
Reply With Quote
  #3 (permalink)  
Old 02-10-2008, 09:57 AM
chuck s chuck s is offline
Elder User
 
Join Date: Jan 2008
Location: Broadview Hts, Ohio
Posts: 512
chuck s is starting off with a positive reputation.
Based on my experience driving Fords with 4x4 Auto the front drive train is always connected with the switch in that setting and any power transfer is activated electronically by engaging a clutch. In 2WD the front drive line is disconnected.

I leave the switch in 2WD unless I think I'll need 4x4. I can feel the drag of the front drive line when I switch to 4x4 Auto at moderate speeds.

-- Chuck
Reply With Quote
  #4 (permalink)  
Old 02-10-2008, 02:48 PM
brandon4 brandon4 is offline
Senior User
 
Join Date: Aug 2006
Location: Logan, Utah
Posts: 477
brandon4 is starting off with a positive reputation.
I know the Ford system is pretty advanced. Don't know how, but it has the ability to send all the power to one wheel front included if need be, but if it is doing that there is ahigh likelihood that it is braking 2 or 3 of the other wheels. So yes, it can send 100% to the front, not just 50/50. Don't know how the hell it does it though.
Reply With Quote
  #5 (permalink)  
Old 02-10-2008, 10:31 PM
IQ9 IQ9 is offline
Senior User
 
Join Date: Sep 2007
Posts: 351
IQ9 is starting off with a positive reputation.
I agree with open difs, it seems pretty crazy if not impossible.
__________________
White Sand 08 Expy EL Limited 4x4 with everything but the power running boards & trip tunes.
Reply With Quote
  #6 (permalink)  
Old 02-10-2008, 10:37 PM
brandon4 brandon4 is offline
Senior User
 
Join Date: Aug 2006
Location: Logan, Utah
Posts: 477
brandon4 is starting off with a positive reputation.
Interesting note is that my 03 Fx4 came standard with a limited slip, but since I ordered advancetrac it deleted the limited slip option. I've really loved the operation of the system. I have an 08 ordered.
Reply With Quote
  #7 (permalink)  
Old 02-10-2008, 10:57 PM
Monsta's Avatar
Monsta Monsta is offline
Post Fiend
 
Join Date: Oct 2001
Location: The Island of Maui
Posts: 18,306
Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.
The 4-auto can send all the torque to one wheel by using the braking system to stop the torque to one, two or three wheels.

If the computer sense one wheel is spinning faster than the others then it will apply brakes to that wheel in an attempt to send the torque to the other wheel (ala open diff). If you are in the predicament where three wheels are levered off the ground, supposedly all the torque (or a lot of it) can be sent to that one wheel by braking the others.

Sounds good on paper and probably works on the street for the most part. You won't see it in any real off-road capable vehicles though.
__________________
Ken
"Socialism, like the ancient ideas from which it springs, confuses the distinction between government and society. As a result of this, every time we object to a thing being done by government, the socialist concludes that we object to its being done at all. " -The Law, Frédéric Bastiat, 1850
Reply With Quote
Old 02-10-2008, 10:57 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 2007+ Expedition & Navigator

Tags
controltrac, selectrac, vs

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 01:15 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.5.2 ©2010, Crawlability, Inc.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup