Question about 1999 Chevrolet Silverado 1500

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The auto transfer case went into 4 lo and won't come out

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Hi, more than likely its your encoder motor on you transfer case, its the long black plastic cylinder that hangs down. This motor is what moves the input shaft which changes the mode that your case is in. Take the motor off (3 mount bolts) and see how it looks. The motor on my transcase was cracked and It had water inside. Found used one on ebay and it worked great.

Posted on Aug 25, 2010

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My 2002 chevy silverado locks up and won't move in 4 wheel drive


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I was driving my 99 Grand Cherokee limited in 4Lo then it just popped out of 4Lo into neutral and will not re engage! When i put it into 4Lo it just revs and grinds when i step on the gas and truck wont...


Try putting the truck into reverse before going into neutral, then put it into 4-lo. Sounds like the transfer case linkage might need to be adjusted, nothing major. I've owned NUMEROUS Jeeps, and every one with an auto tranny was a PITA to get into 4-lo. And if it isn't engaged completely, it will pop out every time.

Nov 20, 2010 | 1999 Jeep Grand Cherokee

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I was driving down the road and my 4WD HI light started blinking today on my 1997 Chevy 1500. If I put it in 4 LO the 4 HI light quits blinking and the 4 LO light comes on Press the 2WD button and the 4HI...


check switch connections,fluid level and actuator at transfer case if good have truck scanned for possible trouble code possibleas sensor or component going bad , some auto stores such as auto zone /advanced auto do it for free if theres a trouble code it will be a starting point

Oct 29, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

4 lo working, 4 hi stopped working , A4WD never worked


Hi my name is Juan and I do own a trailblazer with the same year 2002 and I read the problem you have let me try to help you Have you try to shift to 4hi with your transmission in neutral ? the transmission needs to be in neutral in order to shift the transfer case to 4hi and the vehicle needs to be completely stooped also is your service 4wd light on?? if the light is on your transfer case needs service and it can be as simple as the switch inside your car or a solenoid that has not been detected by the computer

Mar 30, 2009 | 2002 Chevrolet TrailBlazer

2 Answers

2001 Dodge Durango stuck in 4 wheel-Low. Won't switch back to 2WD


Just to clarify, the "transmission" is not stuck in 4-Lo. It is the "transfer case" that is attached to the transmission that actually engages the 4-Hi and 4-Lo modes. To properly shift your vehicle into 4-Lo, you know that you have to shift the transmission into neutral and slow down to less than 5 mph. Once your vehicle slows down to this range, your can switch your transfer case into 4-Lo mode. Due to the inner workings of the transfer case, the actual shift into 4-Lo may take a few seconds to complete. This is normal and does not signify that there is an issue. All transfer cases that have 4-Lo mode will act this way regardless of the make or model. To make a long story short, to shift out of 4-Lo you must follow the same steps that you took to shift into 4-Lo, just in reverse order. Switch the transfer case to 4-Lo mode if it isn't already there. Slow down to less than 5 mph (your vehicle must be moving, though). Then, shift your car into 4-Hi or 2WD. Give your vehicle several seconds to complete the shift. The transfer case indicator light will flash until it is complete. When it does complete the shift into the new gear mode, you will most likely hear a "clunk" (the range sleeve inside the transfer case disengages from its mating spline) from under your car. Again, any transfer case with 4-Lo (regardless of make or model) will exhibit this same noise. This should help you get out of 4-Lo. It is good practice to shift your car into and out of 4-Lo at least a few times each year to keep all of the splines free of corrosion and build-up. Based on the age of your vehicle, your transfer case may also need a complete flush and some new transmission fluid. Hope this helps.

Feb 22, 2009 | 2001 Dodge Durango

1 Answer

4x4 issues, 4 LO works, but 4 HI doesn't.


I had the same problem on my 95 jimmy. I could get it into 4 lo but 4 hi would not work. I replaced all the vacuum hoses that went to the transfer case and it fixed my problem.

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When in auto or 4 hi trans grinds... put int 4 lo and it goes in


That will be either the transfer case or the actuator (if it's a push-button type).

There's a common problem with the actuator that's easy to fix: remove it and open it up, and look for a metal pin with a nylon sleeve over it. What happens is the nylon sleeve gets brittle and breaks and the actuator can't engage properly. Use a piece of 1/4 rubber fuel line to replace the plastic sleeve and you're done.

If it's not that then you'll need to pull the transfer case. You can rebuild or replace it: what I did was find a junkyard T-case and then used parts from the two units to build one that worked.

Dec 31, 2008 | 1997 Ford Explorer AWD

1 Answer

4WD


Look for damaged wires, or something bent, on the Auto Disconnect Device on the front axle before you do anything else. The 4WD HI light is not coming on because the front diff is not engaging.
Re 4 LO: In 4 LO, you ar NOT getting "4 LO", what you are really getting 2WD LO, because of the output gearing of the transfer case.
In any case, your front diff is not locking in, in either mode. The A.D.D. controls the 4 Hi lite.

Oct 11, 2008 | 1997 Toyota 4Runner

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