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Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado and GMC Sierra 4x4 Questions
239 messages, Last post on Dec 01, 2009 at 1:47 PM
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Replying to: kegabear (May 04, 2007 3:59 am) Did it shift into 4Hi or 4Lo? If it was 4Lo, then the problem is not in the front diff. - the diff. doesn't have two speeds. Once you figure it out and do the repair, make sure you take it offroad and put it through the paces to make sure there was no damage. You don't want to find out when you really need 4x4 and it's not available. 1offroader
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Replying to: 1offroader (May 04, 2007 7:41 pm) thanks for your help! |
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I have an 03 Silverado Z71 ext. cab. and just recently the 4wd system has been acting up... I have the AutoTrac system and when I go to turn the truck on, sometimes it says it is in 4wd, auto or neutral. It then tells me to service 4wd, no other lights are on and I'm not turning on anything... Most the time it is normal and in 2wd when I turn it on. Mechanically the sytem works like normal when I want to go 4wd I just push the button as normal and it works... |
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Replying to: 351suckazz (Jan 31, 2007 6:31 pm) |
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| I noticed today that my transmission was in 4H as I was driving down the freeway. Not sure how it got there and not sure how many miles I drove it this way. Is this an issue with this knob? Further, have I damaged the vehicle? | |
i have a 2000 gmc 1500 4x4 it makes a whining noise at any speed it gets louder at highway speeds and the truck has 214,000 miles
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Replying to: geno57 (Oct 20, 2007 5:22 am) You've probably got a bad bearing somewhere but without more info. it is impossible to diagnose. Could be wheel bearing, transmission, transfer case, rear diff. Does it vary with vehicle speed or engine speed? Example: If it's a power steering pump it will make the noise under the hood even though the vehicle isn't moving. Rev the engine with the hood up and listen. If there is no noise it is somewhere in the drive train. You could put all 4 corners up on jack stands, have someone put the truck in Drive, and listen to each wheel bearing as the wheels turn, and crawl around underneath and see where the noise is coming from - transmission, transfer case, etc. Be careful with that, make sure the truck is secure before doing anything like that, and don't get any loose clothing near any spinning items in the drive train. Even if you find the location of the noise it might not be something you can repair yourself unless you are very sophisticated, in which case you probably already know what I've just told you. Good luck. 1offroader |
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2004 Sierra auto. manual 4x4 shift on the hump. I have been told,and the manual says that i can "shift on the fly" from 2 wd to 4wheel high at any speed below something like 45 miles per hour,and back. When i try to shift from 2 wheel to 4 wheel at say 25 mph ,its like shifting a standard tranny without the clutch. I guess i'm expecting that the S.O.F. to be smooth. Truck has done this since new, especially when cold. Manual says you can shift while truck is in motion. Thoughts from 4x4'rs appreciated. |
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| I have a 2004 2500 crew cab duramax 4x4, my father in law has the same truck and my brother in law has a 2001 2500 crew cab 4x4 with the 8.1l in it and we all have had problems with front wheel hub assemblies going out. both me and my father in law have replaced both sides twice in 46K miles on our trucks and the othe truck one set. All the trucke have 4" Rancho lifts and 305-70-16 tires of different brands.The bearing are National brand that we've been using(National beening a repitable company). Has any body had the same problems or can you refer me to another site to discuss this, Thanks. | |
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