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  #11  
Old 02-13-2014, 06:56 AM
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OK guys thanks for the posts. 4 auto was simple and easy, worked great on the snowy ride in today. I'll read that manual this weekend.
thanks for the quick help
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Old 02-16-2014, 06:29 PM
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Okay, I read my manual and in my mind, it really didn't answer the following question. What is the difference between 4 wheel drive AUTO and 4 wheel drive LOCK? Is there a be fit to using one more than the other?
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  #13  
Old 02-16-2014, 10:53 PM
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Quote:
Originally Posted by Pckrfan View Post
Okay, I read my manual and in my mind, it really didn't answer the following question. What is the difference between 4 wheel drive AUTO and 4 wheel drive LOCK? Is there a be fit to using one more than the other?
Someone more familiar with the system probably has a better answer but just from reading I gleaned that if your truck is equipped with AUTO 4wd that you might benefit from that mode vs 4wd lock if you are driving in snow/slippery conditions but not necessarily needing 4wd all the time (which does use more fuel) but need the system to kick in quickly as opposed to the LOCK mode where you might beleaving it in 2wd and switching manually (as I would do since I don't have the auto) as needed.

Here in Texas you usually either need 4wd or you don't...not a whole lot of in between conditions 99% of the year. Up "narth" it can be a whole different animal... (used to live in WA).
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Old 02-16-2014, 11:03 PM
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4 auto is full time 4wd, and can be left on all the time. It will only engage the front wheels when it senses the back wheels slip, so you can drive with it engaged on dry pavement and you won't damage your truck because only the back wheels will be getting power until they slip.

4 Lock is part time 4wd, you can only use it when you are in slippery conditions because it locks the front and rear driveshafts together at the transfer case so the front and rear wheels will always be turning. If you are on dry pavement in 4wd lock and you try to turn then you will bind your transfer case and could cause pretty severe driveline damage.
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Old 02-17-2014, 11:11 AM
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Quote:
Originally Posted by Thunderhorse View Post
4 auto is full time 4wd, and can be left on all the time. It will only engage the front wheels when it senses the back wheels slip, so you can drive with it engaged on dry pavement and you won't damage your truck because only the back wheels will be getting power until they slip.

4 Lock is part time 4wd, you can only use it when you are in slippery conditions because it locks the front and rear driveshafts together at the transfer case so the front and rear wheels will always be turning. If you are on dry pavement in 4wd lock and you try to turn then you will bind your transfer case and could cause pretty severe driveline damage.
makes sense.... Thank you for the clarification.....
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Old 02-17-2014, 11:20 AM
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If 4 auto is anything like what the GM trucks have had, then it is a nice feature when driving in the winter where some parts of the road are a mess, and 10 feet away the road is perfectly clean. Saves time from flicking in and out of 4x4.
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  #17  
Old 02-21-2014, 02:22 PM
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I have a 02 1500 and having problem putting in 4hi. I put truck in neutral then put shifter in 4hi then drive and I get no 4wd light.. And shifts. Moves with ease first truck not sure if it's broke or I'm doing something wrong please help
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  #18  
Old 02-21-2014, 06:35 PM
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Quote:
Originally Posted by turbohawk View Post
I know a LOT of people with 4x4 vehicles and the only people that have had problems with theirs are the ones that don't regularly engage the front axles from time to time. You know, the one that goes for 3 or 4 years without ever using it and finally gets into a situation where they NEED it...and it fails...well, what did you expect? I don't know anyone that's worn out a transfer case...but I'm sure there is one out there.
On the newer 4x4s you do not need to periodically lock in the 4 wheel drive. Back when we had lockouts I always locked in the transfer case once a month for a couple miles to spin and lubricate everything.

Even the 1996 I had that had the CAD did not need locked in on a regular basis to protect the transfer case. The older transfer cases were lubricated only by turning the gears and/or chain inside the transfer case to bring oil from the sump to lubricate everything. By 1996 there was an actual oil pump inside of the transfer case. From what I had been told this was from people that were buying trucks for cars and thought off-road meant pulling into the Walmart parking lot.

Current 4 wheel drives do not even have the CAD so the entire time the front axles, ring gear, pinion gear, drive shaft and all the internals of the transfer case is turning all the time. Totally eliminating the need to exercise your 4 wheel drive.
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  #19  
Old 02-21-2014, 06:38 PM
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Quote:
Originally Posted by hydrex View Post
First, you should read your owners manual. Put it next to the toilet, hehe. I believe 55 mph between 2 hi and 4hi, I've done it higher, no problem. If you ar driving and it starts raining like hell, or road conditions get bad in a hurry.
Why are you using 4 wheel drive in the rain? Unless you have the auto 4 wheel drive the transfer case should never be locked in on a hard surface road in the rain. Unless your tires are shot and you are hydroplaning there is not enough slip to protect your transfer case from damage.
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Old 02-21-2014, 07:15 PM
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Originally Posted by glcarter View Post
Why are you using 4 wheel drive in the rain? Unless you have the auto 4 wheel drive the transfer case should never be locked in on a hard surface road in the rain. Unless your tires are shot and you are hydroplaning there is not enough slip to protect your transfer case from damage.
This is absolutely correct
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