so I got a new swith put in (under the battery tray) to get my 4-wheel drive working. In the 3 years I had it, It hasn't worked, so I am not sure what to expect. But, when switching back to 2wd from 4 hi, it takes upwards of 30 seconds-minute to disengage...so if making a sharp turn let's say, after hitting the button and it switching back, it still feels like it is engaged for a while...is this normal? I know in 4wd it will feel as if it doesn't want to turn at full wheel lock, and the tires will slip on the pavement a bit, but it contunues instead of disengaging...thoughts? Please let me know if I need to take it back to the shop, or if I am just inexperienced with it.

THanks

 

mine does that too. i dont have puch button 4x4, but when i take it out it usually takes a little bit to disengage. i dont know a lot about it but as far as i know its normal.

 

If your vacuum hoses are in good condition, then there isn't much else to do.

 

hey guys,im kinda new with the hole blazer thing ,i just got a 2000 blazers10 LS,and when i take it out of 4wheel drive it sounds like im hitting a bad pot hole,in other words it makes a loud noise

 

Builder...you have a worn/flat tire or different tire sizes on the truck.
GM designer and 89 beater..no, this is not normal, it should only take a second or two for the front differential to FULLY disengage, you both have a sticking vacuum switch on the top of the t-case...swap it out for about $20.00 and you'll be good to go. Takes a 7/8" open-ended wrench, and it's on the driver's side of the t-case with a 3-port vacuum manifold attatched to it....make sure you INDEX it correctly when you plug the manifold into the new switch...there is a locator on the switch and a hole to coincide with it on the manifold. Post up after ya fix it.

 

my 4 wheel drive is engaged by a like a manual stick on the floor. i thought they only used vacuum for the puch botton 4x4.

 

thanks alot,lastcoupe. is that your blazer in the pic on the forum?

 

No, ALL of these trucks use vacuum to control the front axle. Themanually shifted t-case just doesn't have the electronic parts to shift the T-case not the axle that's the only difference. Once itis shifted to any 4x4 range a vacuum switch on the t-case controls the front axle actuator (under the battery tray) whichpulls a cable and engages the front axle. Like I said ALL of them have the t-case switch..unless it is AWD or the newer ones with Auto 4WD, and they have a vacuum solenoid under the hood instead of the switch on the t-case, but still control the front axle by switching vacuum..

You're welcome..yes that's my blazer in my sig, and on the ROTM poll.