'95 4X4 problems need help ASAP, too much snow
#1
12-23-2008, 06:08 PM
'95 4X4 problems need help ASAP, too much snow
Hey Ive got a '95 Blazer 4X4" vortec, having problems with 4hi and 4lo engaging. I have a manual shift lever, not the automatic one and cant get anything to work. I replaced the actuator and everything thing sems to look good including the cable. If you have any suggestions I would love to hear them, we have 36" of snow!!! Thanks!
#2
12-23-2008, 06:21 PM
RE: '95 4X4 problems need help ASAP, too much snow
A 95 with a lever on the floor? Hmm. Thought GM stopped using the NV231 before that.
Anyway, what does "cant get anything to work" expand out to? What is it not doing? When you push on the lever, what happens? Remember, our recommendations depend heavily on your descriptions, so make them detailed!
Anyway, what does "cant get anything to work" expand out to? What is it not doing? When you push on the lever, what happens? Remember, our recommendations depend heavily on your descriptions, so make them detailed!
#3
12-23-2008, 06:28 PM
RE: '95 4X4 problems need help ASAP, too much snow
Sorry, when I shift into 4hi, it doesnt engage, even when rolling, same goes for 4lo, i can hear the rear differential kick into gear but nothing happens inthe front. That's about the best I can desribe it. Thanks again
#4
12-23-2008, 06:36 PM
RE: 95 4X4 problems need help ASAP, too much snow
Even the NV231 had a vacuum switch which engaged the front axle. You should start by removing the battery and checking for engine vacuum at the front axle actuator (engine running w/ 4wd engaged). If you do not have vacuum there, then the switch at the transfer case is likely bad.
Here is a diagram of the 4wd system in your truck:
If you have vacuum at the actuator and it still is not pulling on the cable, the actuator could be bad, or the cable could be froze up. You can test the actuator by disconnecting it from the cable. With vacuum applied, it should suck in. If it does, then the cable is likely froze. Some penetrating oil and a bit of muscle to work it back and forth should cure that up.
Here is a diagram of the 4wd system in your truck:
If you have vacuum at the actuator and it still is not pulling on the cable, the actuator could be bad, or the cable could be froze up. You can test the actuator by disconnecting it from the cable. With vacuum applied, it should suck in. If it does, then the cable is likely froze. Some penetrating oil and a bit of muscle to work it back and forth should cure that up.
#5
12-23-2008, 08:26 PM
RE: 95 4X4 problems need help ASAP, too much snow
when you put it into 4wd does the slip shaft lock in? If it does as Kyle said...there now should be vacuum at the servo. If you have that then the cable should move and pull in the front diff.(you could test that by putting the truck in 2wd and pull the servo cable in...the slip shaft should lock in from the front indicating that the cable and front differential is ok. I doubt you've got all this if you have no 4wd....Start with the first step and go from there and if you wish report back your findings and we'll all get this fixed. Merry Christmas! JP
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