Go Back   DodgeForum.com > Dodge Trucks > Dodge Ram > 4th Gen Ram Tech
Sign in using an external account
Register Forgot Password?


4th Gen Ram Tech 2009+ and up Rams: This section is for TECHNICAL discussions only, that involve the 2009 and up Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

how does my 4x4 work?

Reply
 
 
 
 
Thread Tools Search this Thread
  #1  
Old 12-03-2009, 10:27 PM
crod crod is offline
All Star
Garage is empty, add now
 
Join Date: May 2009
Vehicle: 2009 dodge ram 1500. quad cab 4x4 sport. sunburst orange. 20" chrome clads,3.55 rear end.
Location: s.e. michigan
Posts: 845
Default how does my 4x4 work?

ok, i knew that would get some attention. lol but im semi serious.

i have an 09 quad cab sport 4x4. 3.55 rear

how exactly does it work? (mine just has 2wd,4hi,4lo)

i wish i could see an example like on the jeep website, that shows a graphic of how each system works....

would it be similiar to their command trac 2?
http://www.jeep.com/en/4x4/how_syste...ommand_trac_2/

now. does this system put all the power to one wheel etc. on our trucks? or each wheel gets 25% power?
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on Dodge Forums!
Reply With Quote
  #2  
Old 12-04-2009, 08:23 AM
jball jball is offline
Professional
Garage is empty, add now
 
Join Date: Sep 2009
Vehicle: 2009 dodge ram 1500 4x4
Location: Marshall, MI
Posts: 175
Default

In 4wd it gets split 50% front 50% rear. It works just like that diagram in your link. It's the simplest system with the least amount of parts to break or wear out.

It will vary the amount of power to each wheel depending on traction. If one wheel has lots of traction, and the other has no traction... all the power gets sent to the wheel with no traction.
Reply With Quote
  #3  
Old 12-04-2009, 01:06 PM
crod crod is offline
All Star
Garage is empty, add now
 
Join Date: May 2009
Vehicle: 2009 dodge ram 1500. quad cab 4x4 sport. sunburst orange. 20" chrome clads,3.55 rear end.
Location: s.e. michigan
Posts: 845
Default

ok, thats basically what i was talking about. so it doesnt "lock" the front. so essentially one wheel can get almost 100% power if needed?

dont most of the hardcore off road guys, want air or elec. lockers? dont those lock the diffs, so all the wheels get split evenly and never change?
Reply With Quote
  #4  
Old 12-04-2009, 01:34 PM
offroadjosh's Avatar
offroadjosh offroadjosh is offline
Record Breaker
1996 Dodge Ram 1500
 
Join Date: Sep 2009
Vehicle: 1996 Dodge ram 360 5.9L 4x4
Location: Montana
Posts: 2,065
Default

Basically yes. Some run spools which lock the axle together no matter what, some run lockers which lock the axle together soon as there is a difference speed(so when coasting its unlocked) and some run LS which are either clutch or gear driven and will sometimes let the tire with traction spin. So all in all... An open diff 4x4 is basically a 2 wheel drive one up front(lightest tire) one in rear (lightest tire).


Josh
Reply With Quote
  #5  
Old 12-04-2009, 02:43 PM
Ironsides Ironsides is offline
Professional
Garage is empty, add now
 
Join Date: May 2009
Vehicle: '09 Ram 1500 Crew Cab 4X4 Big Horn
Location: New City, NY
Posts: 153
Default

Quote:
Originally Posted by jball View Post
It will vary the amount of power to each wheel depending on traction. If one wheel has lots of traction, and the other has no traction... all the power gets sent to the wheel with no traction.
That's not how the 4WD system works on these trucks.

http://www.dodge.com/en/2010/ram_1500/capability/4wd/

From the link
"The 4-HI setting locks both drive shafts for extra grip and pulling power to give you confident handling on slippery, wet and graveled terrain."

The 4WD system on my '01 Dakota worked the same way. Definitely don't engage the 4WD on a dry surface. The "4WD Auto" system works differently though. The differentials aren't locked all the time. They couldn't be.

It doesn't mention how the transfer case works, I assume it splits the torque evenly like the Jeep system, but I'm not sure.
Reply With Quote
  #6  
Old 12-04-2009, 02:50 PM
crod crod is offline
All Star
Garage is empty, add now
 
Join Date: May 2009
Vehicle: 2009 dodge ram 1500. quad cab 4x4 sport. sunburst orange. 20" chrome clads,3.55 rear end.
Location: s.e. michigan
Posts: 845
Default

so we have a the open diff?



i also had an 08 jeep grand cherokee overland. it had this system. awd

http://www.jeep.com/en/4x4/how_syste...uadra_drive_2/

but it had electronic LSD'S front, center, and rear!!

how the hell does that affect that video in the above link?

side note: that thing was AMAZING in ice/snow etc.....
Reply With Quote
  #7  
Old 12-04-2009, 03:17 PM
offroadjosh's Avatar
offroadjosh offroadjosh is offline
Record Breaker
1996 Dodge Ram 1500
 
Join Date: Sep 2009
Vehicle: 1996 Dodge ram 360 5.9L 4x4
Location: Montana
Posts: 2,065
Default

Unless your truck came with a LSD then yes it is open.

Josh
Reply With Quote
  #8  
Old 12-04-2009, 03:29 PM
jball jball is offline
Professional
Garage is empty, add now
 
Join Date: Sep 2009
Vehicle: 2009 dodge ram 1500 4x4
Location: Marshall, MI
Posts: 175
Default

You are misreading what they are saying. It splits it thru the drive shafts, not axle shafts. 50% to the front 50% to the rear, if you have no traction on one of your tires - it will send all that power to the tire with no traction and make it spin (unless you have the LSD - which he doesn't with the 3.55 option). I think you are confusing what the transfer case does and a differential.

The 4wd Auto setting that you are talking about is common on some of the older Grand Cherokees and even regular Cherokees, and other Chrysler products that came with them (249 and 242 transfer cases). These transfer cases have some sort of viscous coupler that will send the torque to the drive shaft which has more traction.


Quote:
Originally Posted by Ironsides View Post
That's not how the 4WD system works on these trucks.

http://www.dodge.com/en/2010/ram_1500/capability/4wd/

From the link
"The 4-HI setting locks both drive shafts for extra grip and pulling power to give you confident handling on slippery, wet and graveled terrain."

The 4WD system on my '01 Dakota worked the same way. Definitely don't engage the 4WD on a dry surface. The "4WD Auto" system works differently though. The differentials aren't locked all the time. They couldn't be.

It doesn't mention how the transfer case works, I assume it splits the torque evenly like the Jeep system, but I'm not sure.
Reply With Quote
  #9  
Old 12-04-2009, 03:37 PM
offroadjosh's Avatar
offroadjosh offroadjosh is offline
Record Breaker
1996 Dodge Ram 1500
 
Join Date: Sep 2009
Vehicle: 1996 Dodge ram 360 5.9L 4x4
Location: Montana
Posts: 2,065
Default

4hi is 50/50 front/rear. 2hi is 100 rear... 4lo is same as 4hi just lower gearing. if you have one rear tire on the ground and one front tire on the ground you arn't gunna go anywhere. if you have 2 front tires and one rear tire on the ground you can move long as your in 4x4. So all in all the transfer case sends power equally to both axles, which in turn the axles(ring and pinion) differentiate the power to which ever tire is lightest(easiest to spin). So when you put your truck in 4hi you have a 50/ 50 split. even if you have no tires on the ground in the rear and 2 tires up front on the ground only 50% of the power will be applied up front. Idk about the 4 auto with these.

Josh
Reply With Quote
  #10  
Old 12-04-2009, 06:38 PM
Ironsides Ironsides is offline
Professional
Garage is empty, add now
 
Join Date: May 2009
Vehicle: '09 Ram 1500 Crew Cab 4X4 Big Horn
Location: New City, NY
Posts: 153
Default

Quote:
Originally Posted by jball View Post
You are misreading what they are saying. It splits it thru the drive shafts, not axle shafts. 50% to the front 50% to the rear, if you have no traction on one of your tires - it will send all that power to the tire with no traction and make it spin (unless you have the LSD - which he doesn't with the 3.55 option). I think you are confusing what the transfer case does and a differential.

The 4wd Auto setting that you are talking about is common on some of the older Grand Cherokees and even regular Cherokees, and other Chrysler products that came with them (249 and 242 transfer cases). These transfer cases have some sort of viscous coupler that will send the torque to the drive shaft which has more traction.
I was under the impression that the differentials lock up when in 4WD, except for 4WD Auto. I'm going to look into it.

Last edited by Ironsides; 12-04-2009 at 06:51 PM..
Reply With Quote
Old 12-04-2009, 06:38 PM
 
 
 
Reply




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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join DodgeForum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -4. The time now is 07:23 AM.

Internet Brands, Inc.


Contact Details & Emails