RE: Difference's in 4X4 PT, Low, Hi, AWD
Login  | |
|
RE: Difference's in 4X4 PT, Low, Hi, AWD - 12/11/2007 10:19:53 PM
|
|
|
02DurangoR/T_Milw
Posts: 12
Joined: 3/20/2007
Status: offline
|
So basicly 4x4pt is like my R/T's awd. You can switch from 2hi to 4x4pt and it only kicks in when you slip. Like my 02 Envoy.
|
|
|
|
|
|
|
RE: Difference's in 4X4 PT, Low, Hi, AWD - 12/11/2007 10:36:37 PM
|
|
|
deerang
Posts: 792
Joined: 9/25/2006
Status: offline
|
quote:
is this the same method for dodge engagement or is it shift on the fly ????
it is shift on the fly, however a lot of people prefer to shift while stopped to ensure the transfer case isnt damaged.
I however shift on the fly all the time and have not had any damage. If its bad that i need 4hi when I'm leaving, I'll put it in while I'm stopped, otherwise I'll shift when i need it.
_____________________________
2000 Durango SLT
4.7L
Flowmaster Super-40
270,000km and still eating rice
{0,0}
|)__)
-"-"-
O RLY?
|
|
|
|
|
RE: Difference's in 4X4 PT, Low, Hi, AWD - 1/2/2008 12:24:46 PM
|
|
|
digitalkreation
Posts: 2
Joined: 12/27/2007
Status: offline
|
Hey Rebel,
My options are the same as yours:
2Hi
4Hi
Neutral
4Lo
I guess we just don't have the fanciness of Traction Control in our goats.. It's ok, I like being old fashioned!
_____________________________
Mark B
1999 Durango SLT
5.2L 4X4
|
|
|
|
|
RE: Difference's in 4X4 PT, Low, Hi, AWD - 2/7/2008 7:55:24 AM
|
|
|
Kohburn
Posts: 40
Joined: 2/6/2008
Status: offline
|
I just picked up a 2002 slt 4.7 4x4 last month - its got the electro shift knob from 2wd-4hi-4lo
I have noticed some noise in the rear when making slow tight turns that I asusme is a limited slip int he rear differential. I haven't noticed any binding in 4hi - but I have noticed it in 4lo (have only used it on gravel and mud)
so do the electroshift models have a different transfer case than the floor shifter models? and is the 4hi in mine a fully locked 4wd or is is a limited slip version like AWD (i also have a subaru with limited slips)
|
|
|
|
|
RE: Difference''s in 4X4 PT, Low, Hi, AWD - 6/25/2008 11:01:10 PM
|
|
|
hackler
Posts: 2
Joined: 6/25/2008
Status: offline
|
All Right I can not believe the disinformation here... It bugs me that there hasn''t been a correct answer here in 2+ years... Everyone is close, but no cigar. I have a 99 Durango so my reply is regarding this one (SLT 5.2L)
OK:
2HI: Differential is disengaged 100% power to rear axel - drives like regular rear wheel drive car
4 Part Time: Most Traction you can get... Locks the diff so you get 50% Power to front axle and 50% power to the rear axle - if you feel safe driving over 50 mph in 4Part Time you don''t need to be in it - axel bind will happen on dry road in about 5 miles above 50 mph
4 Full Time: OK Traction in slippery conditions - great for awesome handling on a dry road - differential is working to transfer 100% power to the wheel that is slipping the most on the front or rear axel - THIS IS A KEY POINT!! READ ON...
This is what hasn''t been addressed yet in this forum... unless you have a LSD (limited slip differential... (standard on the rear of 5.9 and on some 5.2s) which shifts power to a wheel that doesn''t slip (usually in a 40%/60% configuration) then even though you are in 4 Full Time you are driving the equivalent of a front or rear wheel drive car based upon the road condition under each wheel.
4x4 drivers need to understand that in most 4x4 trucks or suvs when you are in "4wheel drive" all you are getting is 2 wheel drive... here''s why:
the tranny''s (the ball in the middle of the axel with the gears transfering power from the drive line at a 90 degree angle to the axel (front and rear) ) is designed to allow the wheel on the inside of a turn to rotate slower than the outside wheel so you don''t get "wheel hop". If the tranny didn''t allow for this then the inside wheel (which has less distance to travel in a turn) would want to travel the same distance as the outside wheel (which has a farther distance to travel)... this would cause the inside wheel to "hop" or literally skip because it would be trying to travel the same distance as the outside wheel. Older cars had this problem... (If you''ve ever seen the movie My Cousin Vinnie you may remember the key piece of evidence was that the car was a direct drive... when peeling out there were two tire marks for a burnout... not one. But I digress)
Try this... you may have experienced it already... when in 2Hi in your Durango going slow, crank the wheel hard in either direction and punch it... What happens? The inside wheels starts spinning out and the truck go nowhere... Do you understand now? The wheel with the LEAST traction gets all the power... whole lotta smoke and noise... not going anywhere... unless you have a LSD which senses when the inside wheel starts losing traction and then transfers about 40% of the power to the wheel that doesn''t.
Now let''s put your Durango on some patchy ice. Just so happens that you stopped on a cold day in 2HI in your Durango... your rear right wheel is on a patch of ice and your rear left is on dry ground. You go to accelerate a little hard and suddenly that right rear wheel on a patch of ice starts spinning and your truck ain''t moving. All power is going to your wheel that has the least traction.
Move the transmission into 4 Part Time... this locks the differential and transfers 50% of the power to the rear tranny and 50% to the front tranny... your front wheels are both on dry pavement... as you accelerate, you notice your rear right wheel spin, but the front wheels (on dry pavement) grab and get you going. Fantastic you made it!
What would have happened if you put the Durango in 4 Full Time? The rear wheel would have continued to spin, even though the differential was engaged... 100% of the power would have still gone to your rear right wheel, or any of the 4 wheels that would have been on ice.
Now here''s the kicker, the 4x4 works great when all wheels have some form of traction, but the second that there is no tranction on one wheel in 4 Full Time you might as well be in 2 Hi.
Confused? Don''t be... here''s what you do... bad road conditions snow and ice 4 Part Time... don''t go over 45 or 50 mph because another thing that many 4x4 owner don''t understand is that 4x4 will get you going fast in slippery conditions but you can''t stop... if you do need to stop in slippery condition, you will need to down shift with you automatic to really make a difference, the second you lose traction on the wheel it''s gone... brake with the engine, not with the brakes.
Really bad conditions, 4 Low, don''t go above 25mph, you really cant''s
Slippery boat launch 4 Low
So when do I use 4 Full Time you ask? When you are on a windy road with plenty of traction, the wife and kids (or hubby and kids I guess) aren''t in the truck and you want to get the performance of an AWD vehicle... try it some time on a 280 degree onramp turn... your truck will blow you away... the rear end will not swing out as your front tranction will pull thru the turn for you and you find you can keep up with the Porsche in front of you... until the straight away of course...
I really don''t get why Dodge put the 4 Full Time in because you really don''t need it unless you want to get your truck to perform like a race car, which is fun to have I suppose. I guess I would really prefer more options than less.
Enjoy
|
|
|
|
 Today's Posts
Most Active Topics
Make A Donation
Forum Rules & FAQ
RSS Feeds
SRT Forums
Race News
Dodge Prices
Dodge Trucks & SUVs
Ram  Dakota
Durango Nitro
Dodge Cars
Avenger Intrepid
Caliber Magnum
Challenger Neon
Charger Stealth
Daytona Stratus
Dodge Viper
Advertising Info
|
Contact Us |
Link To Us |
Sitemap |
Archive |
Advertising |
Automotive Directory |
About Us |
Dodge Links |
Legal |
Privacy Policy |
© Dodge Forum
Harley Davidson |
Ford Mustang Forums |
Dodge Challenger
Dodge Forum .com is not affiliated with or endorsed by Daimler Chrysler.
|
Printable Version
