2001 S-10 4WD not working correctly

Tiny
SJTFDFIREFIGHTER354
  • MEMBER
  • 2001 CHEVROLET S-10
My 2001 Chevrolet S-10 4WD Ext. Cab with 91,000 miles, V6 4.3L, will not shift into 4WD. You can here it lock in as if it were shifting into 4WD, but when it comes time to use it, it remains in 2WD only. The 4WD button lights inside the cab act as if it were in 4WD, but once again, it remains in 2WD. I have already checked my 4WD fuse inside the cab and it was okay. Its as if everything is normal, even the transmission shifts and moves like its in 4WD in both 4 high and 4 low, but it remains in 2WD. What do I need to do guys?
Do you
have the same problem?
Yes
No
Monday, August 27th, 2007 AT 12:03 AM

4 Replies

Tiny
SJTFDFIREFIGHTER354
  • MEMBER
I am going out on a limb here. I am trying to help you. I am not a 4WD expert. I am a pretty good troubleshooter. This bothers me that you get the confirmation light. Could you climb under the vehicle and have someone else select 4WD and see if the driveshaft and universal joints to the front wheels "thump". Could you have sheared a keyway or a universal joint to the front gearbox. Could you jack up the front of the vehicle off the ground and select 4WD and see if the front wheels freewheel. Food for thought.[/Quote:d6b72455ef]

I really appreciate the help! My friend and I found a small "patch" of mud out behind his house, so I thought it would be wise to pull in there, try out the 4WD to see if all 4 tires would spin in the mud. So, before I pulled in, I put the transmission in N, and started out in 4LO. As I mentioned before, it acted as if it were in 4WD, with the truck lurching forward after shifting into drive. I eased into the mud, and of course, got stuck. Only the rear wheels spun. I had him pull me out which was no big deal. Dont get the wrong idea thinking that it was a huge mud bogg, it was just some wet dirt per say. I am afraid that I may be forced into taking into a mechanic, but I have already been quoted at over $100 just for a look. I am out of options and I have no clue what the problem could be. Crawling under the truck, I found everything intact with nothing out of the ordinary to the naked eye. As I mentioned before, you can here and feel the truck shift in and out of 4WD, but im not getting any results. Any other help?
Was this
answer
helpful?
Yes
No
+1
Tuesday, August 28th, 2007 AT 11:50 PM
Tiny
MEH101465
  • MEMBER
I've had the same problem. My 02 did the same thing. The problem was a vaccume leak from the transmission to the canister under the battery. This vaccume is nessacary to accuate the lock up in the front end. It cost me about ten bucks for hose, and about 1 hour to route the hose. To check this, I pulled the battery, battery holder, to expose the canister, you will see a hose, and a cable. Pull the hose off the canister and blow through it. If you hear air. You have a leak.
Hope this helps
Was this
answer
helpful?
Yes
No
+1
Saturday, September 1st, 2007 AT 10:40 AM
Tiny
SJTFDFIREFIGHTER354
  • MEMBER
I've had the same problem. My 02 did the same thing. The problem was a vaccume leak from the transmission to the canister under the battery. This vaccume is nessacary to accuate the lock up in the front end. It cost me about ten bucks for hose, and about 1 hour to route the hose. To check this, I pulled the battery, battery holder, to expose the canister, you will see a hose, and a cable. Pull the hose off the canister and blow through it. If you hear air. You have a leak.
Hope this helps[/quote:cd91818081]

I will try that this weekend and see what happens! I will post an update sometime next week, thanks a ton for your help!
Was this
answer
helpful?
Yes
No
Thursday, September 6th, 2007 AT 9:59 PM
Tiny
SJTFDFIREFIGHTER354
  • MEMBER
I've had the same problem. My 02 did the same thing. The problem was a vaccume leak from the transmission to the canister under the battery. This vaccume is nessacary to accuate the lock up in the front end. It cost me about ten bucks for hose, and about 1 hour to route the hose. To check this, I pulled the battery, battery holder, to expose the canister, you will see a hose, and a cable. Pull the hose off the canister and blow through it. If you hear air. You have a leak.
Hope this helps[/quote:a8a9370d59]

I will try that this weekend and see what happens! I will post an update sometime next week, thanks a ton for your help![/Quote:a8a9370d59]

Alright guys, well the post about the hose under the battery was correct, apparently, my battery was leaking a little bit of acid, and some of it leaked onto that hose, which ate a hole through it, making it unable to obtain the needed vacuum. I found all of this out by taking it to a small repair shop that looked at it for free, and they wanted $200 to fix it, and sadly after calling around, this is the cheapest place in town, and I am from fort wayne, IN which a fairly good sized city! I have a friend that deals auto parts, and said that if I can find out what material the hose is made of, that he could get me the parts to fix it, so does anyone know what type of hose it is? He said that it is not hard to replace.
Was this
answer
helpful?
Yes
No
Wednesday, October 24th, 2007 AT 4:11 PM

Please login or register to post a reply.

Recommended Guides