4WD "bumping" problem - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Ranger Forum Forum for discussion of the Ford Ranger.

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 03-05-04, 08:53 AM Thread Starter
Registered User
Join Date: Mar 2004
Posts: 4
confused 4WD "bumping" problem

When in 4WD, my auto trans '03 Ranger makes a "bump" sound. The whole vehicle jerks when it happens. Dealership put 4 new tires on it and replaced the drive shaft with no improvement. "Bumping" is louder and harder when decelerating and does not occur when accelerating. Ranger has 28,000 miles on it. "Bumping" is most noticeable on dry pavement but occurs on other surfaces also (including gravel and snow). When switching back to 2WD, one last "bump" signifies the disengaging of the 4WD. Dealership techs have never seen this and don't know what to do. Help!
PS-Bumping happens every 1/8 mile or so when driving steady. When decelerating, bumping happens every few seconds.

johnbaker17 is offline  
Sponsored Links
post #2 of 2 (permalink) Old 03-09-04, 10:23 AM
Registered User
JohnnyO's Avatar
Join Date: Nov 2003
Location: Pittsburgh, PA, USA
Posts: 214
Re: 4WD "bumping" problem

Sounds like the front end binding up. This is common (and normal) in 4wd, you should NOT BE in 4wd on dry pavement or any time the wheels can't slip. Caused by differing speeds of the inside and outside wheels when you turn.

'05 Sport Trac 4x4, L/S, torsion lift, extended shackles, 265's
'03 Taurus wagon, Silverstars, Yoko TRZ's
If you give a man a fish, he'll eat for a day. If you teach a man to fish, he'll sit in a boat and drink beer all day.
JohnnyO is offline  
Sponsored Links

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Trucks | Utes | Vans |SUVs | Crossovers > Ford Ranger Forum

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome