4x4 not working - Pirate4x4.Com : 4x4 and Off-Road Forum

aussiewheeler · 01-11-2006, 05:50 PM

hey yall, i have an 87 s10 blazer and we just put a new flex plate in it and we got it all back together and now the 4x4 doesnt work. i think it might be in the adjustment, but i wont be able to work on it until the weekend. so i would like any advise yall can spare. if you think its the transfercase then maybe i should start looking for one in the junkyard. if its the linkage i will just wait for the weekend. also, the CV joints werent spinning when it was in 4x4 so it cant be hubs i dont think.
thanks we got stuck in it when we realized the 4x4 wasent working ( ya i know should have checked)
thanks.

guidolyons · 01-11-2006, 06:04 PM

I don't think your flexplate had much to do with it. Transfercase is probably still good also. Shift the xfercase into 4wd and attempt to turn the driveshaft by hand (with the front wheel off the ground) More than likely it's the CAD unit (central axle disconnect) unit. On the S10 its actuated by a vacuum. It's a common failure, or maybe a line came loose while you were messing with the flexplate. Trace the lines from the CAD (on pass side axle) back up into the engine compartment. If it is bad you can replce it with a cable http://www.4x4posi-lok.com/app_chevy-s.html

s1037s · 01-11-2006, 07:17 PM

also check to see if the vaccum plug on the tcase has been left loose or forced on the wrong way. been there

aussiewheeler · 01-11-2006, 09:04 PM

Quote:

Originally Posted by s1037s

also check to see if the vaccum plug on the tcase has been left loose or forced on the wrong way. been there

what do you mean the vacume plug. are you talking about the 3 or so vacume lines that run to the transfercase or are you talking about a like rubber plug somewhere on the t case. sorry i am kinda a newb when it comes to this truck.

3/4ton62gmc · 01-11-2006, 09:19 PM

very common problem on these vehicles is the vacuum line on the passenger side. Check the vacuum lines at the joint of the trans and engine i would say that 95 out of 100 these vehicles with this problem are caused by a vacuum line problem in this area. My .02$

aussiewheeler · 01-12-2006, 05:57 PM

well you guys i just got back from the shop and we got the 4x4 to work. there was a vaccume line not connected and there were holes in another so we plugged the holes with duct tape just to see if they were the problem and apparently they were. it locked in and we had 3 tires spinning.
thanks for the help guys i would never had thought of vaccume

s1037s · 01-12-2006, 06:46 PM

glad to be of help. is boring oregon near forest grove?

01-11-2006, 05:50 PM	#1 (permalink)
aussiewheeler Registered User Join Date: Nov 2005 Member # 62400 Posts: 18	4x4 not working hey yall, i have an 87 s10 blazer and we just put a new flex plate in it and we got it all back together and now the 4x4 doesnt work. i think it might be in the adjustment, but i wont be able to work on it until the weekend. so i would like any advise yall can spare. if you think its the transfercase then maybe i should start looking for one in the junkyard. if its the linkage i will just wait for the weekend. also, the CV joints werent spinning when it was in 4x4 so it cant be hubs i dont think. thanks we got stuck in it when we realized the 4x4 wasent working ( ya i know should have checked) thanks.

01-11-2006, 07:17 PM	#3 (permalink)
s1037s Registered User Join Date: Oct 2005 Member # 54549 Location: stae of confusion, Ky Posts: 446	also check to see if the vaccum plug on the tcase has been left loose or forced on the wrong way. been there __________________ My wife still doesn't know about Pirate4x4.SHHHHH! Sky high!

01-12-2006, 06:46 PM	#7 (permalink)
s1037s Registered User Join Date: Oct 2005 Member # 54549 Location: stae of confusion, Ky Posts: 446	glad to be of help. is boring oregon near forest grove? __________________ My wife still doesn't know about Pirate4x4.SHHHHH! Sky high!

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01-11-2006, 09:19 PM	#5 (permalink)
3/4ton62gmc Wheeler Join Date: Nov 2004 Member # 38880 Location: Phoenix Az. Posts: 247	very common problem on these vehicles is the vacuum line on the passenger side. Check the vacuum lines at the joint of the trans and engine i would say that 95 out of 100 these vehicles with this problem are caused by a vacuum line problem in this area. My .02$

01-12-2006, 05:57 PM	#6 (permalink)
aussiewheeler Registered User Join Date: Nov 2005 Member # 62400 Posts: 18	well you guys i just got back from the shop and we got the 4x4 to work. there was a vaccume line not connected and there were holes in another so we plugged the holes with duct tape just to see if they were the problem and apparently they were. it locked in and we had 3 tires spinning. thanks for the help guys i would never had thought of vaccume