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Comments
if the trans is seriously over filled, or you are experiencing "blow by" in the engine, you could point finger in that general direction.
I've seen oil in vacuum lines before, but usually the trans level, or oil level was too high , or blow by existed because of either worn engine, or non-maintenance of emission systems
Are there any other items that can be checked? Thanks.
I have recently acquired a '99 Blazer w/ 3 button electronic 4WD. It has almost 190,000 miles on it and has already become a money pit. I've replaced the transmission and torque converter, intake manifold gasket and both upper and lower ball joints in a 2 month period. Now I'm concerned about the 4WD. When I got the truck the 4WD worked fine..shifted on the fly smoothly no grinding. After I got it back from the tranny/ torque converter work there was a nasty grinding when i put it into at 50mph and was told by the mechanic that did the transmission work that I should always be stopped and in Park or Neutral to put it in 4WD regardless of what the manual said. That seemed to be fine but last night (I live in Michigan with lots of snow right now) I put it in 4H just to get it into the driveway and when the tires started spinning there was a terrible grinding from underneath. I am still able to move it from 4H to 2H (haven't tried 4L) and it seems to drive fine in either with no grinding unless the tires spin. Any clues would be greatly appreciated. I have put almost $3500 into repairs on this truck (which is more than I paid for it in the first place last November).
Thanks!
Which hose goes to what pole of the 3 pole switch?
Thanks,
Jak
I changed the ball looking vac switch on top or the trasnsfer switch but still have the problem. It will not shift into 4WD then it went to no power again. I put it P and after playing with the buttons it went back to 2WD.
Any ideas?
Under the battery you will find the actuator. It is vaccuum controled there is not much to this part and you should be able to see if it is working. You may have to start it. That can be done with jumper cables to the battery leads.
The problem I have is the cable from the acutator is frozen. Give it a little pull and it should move. If not that needs to be replaced.
Hope that helps.
Once winter was over I attempted to push the button to engage 2WD and it would not go. My buddy who has a 2500 HD Silverado told me how to do it and it worked. The problem is that now when I push the 4WD button it will not engage the 4WD.
I have two small children and with winter upon us in the NE I need to get this repaired. A co-worker had a Blazer and it had a similar problem that he said cost about $150 to fix.
Does anyone have an idea of what it could be and could an average auto guy do it himself?
Any feedback would be greatly appreciated.
I took it to a mechanic and lo and behold it the diagnostic test revealed a bolt needed to be removed and replaced.
Now it is working fine and a very inexpensive repair.
The vacuum line runs down the passanger side by the transmission dipstick tube and transmission lines, i didnt need to trace it any further. Cut the vacuum line start the car with 4x4 engaged and check for vacuum and reconnect it with a union.