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Auto/Truck/Other Transportation If you use it to get from here to there, this is the place to talk about it and how to fix it.

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  #1  
Old 03-19-2018, 10:46 PM
sethwyo sethwyo is offline
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Default 4x4 stuck in nutral

1995 Chevy. 5speed. 4x4. Gasoline v8

Four wheel drive would not engage. But worked in 2high. now it will not engage.

I hold clutch down and move the 4x4 shifter , it feels and sounds like it is going into four wheel drive or hi low or two wheel drive. But when let off clutch nothing happens.

The day it stopped working all together, it would not start, when I turned the key it would click down at starter but not engage or spin. I loosened connections at solenoid, moved connectors around and tightened them back. It started as usuall. But would not move. Other than that I can't remember doing anything else.
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Old 03-20-2018, 03:18 PM
Doninalaska Doninalaska is offline
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You might have two different issues. It sounds like the starting issue is just a bad connection somewhere. There 4x4 thing could be the actuator on the hubs or a leaky vacuum system somewhere if it uses vacuum to engage the hubs. I had a similar thing with the hubs on my truck at the beginning of winter, but I think it was mostly that things weren't moving since I hadn't used my 4-wheel drive for some time. I thought I was going to have to change the actuators but I didn't want to crawl around in the snow so I postponed the repair. I started putting it in and out of 4-wheel every time I drove it for a while. It seems to have loosened up and is working again, although it still seems sticky. Either I will look at it when the snow is gone and the ground is dry, or I will ask my son to check it out. Try "exercising" it a few times and see if it gets better.
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Old 03-21-2018, 03:35 PM
sethwyo sethwyo is offline
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it usto not go into 4x4. now it will not go into two wheel drive either. the floor lever moves ok. transmission shifts. but when release clutch nothing happens. i figured the wire connection issue had something to do with the actuator. but should it still work in 2 wheel drive ?
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Old 03-21-2018, 03:41 PM
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Bearfootfarm Male Bearfootfarm is offline
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Have you crawled under it and looked at the linkage?
Something may be jammed or broken.
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Old 03-21-2018, 04:33 PM
sethwyo sethwyo is offline
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yes i got under it to find anything i could. i can get ahold of the transfer case linkage and move it back and forth. nothing looks out of place.
transfer case has the feel of catching into hi/lo 2 & 4, & tran does too.
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Old 04-01-2018, 09:13 PM
Lurch Male Lurch is offline
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I just looked at an exploded view of the NP246 transfer case, which should be in your model GM truck, assuming it is a half ton. I'd say the problem is inside the transfer case, most likely with the shift fork. Maybe try jacking both rear tires off the ground, support the rear of the truck with jackstands, have someone manually turn one of the rear tires while someone in the cab tries moving the transfer case shift lever to grab a gear. If this doesn't work, that T-case will most likely need to come off. You can find a used one at a wrecking yard for half the price of a new one, with a warranty on it.
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Old 04-01-2018, 10:22 PM
sethwyo sethwyo is offline
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3/4 ton. ill give your remedy a try.

Thank you for advise
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Last edited by sethwyo; 04-02-2018 at 12:02 AM.
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Old 04-02-2018, 03:36 PM
Lurch Male Lurch is offline
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Quote:
Originally Posted by sethwyo View Post
3/4 ton. ill give your remedy a try.

Thank you for advise
The model 2500 from that time period used a NP241C transfer case.
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Old 04-02-2018, 03:41 PM
Lurch Male Lurch is offline
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I plugged in your symptoms and came up with:

1. worn shift forks
2. broken shift forks
3. input shaft snap ring failure
4. range hub malfunction
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Old 04-22-2018, 10:38 PM
sethwyo sethwyo is offline
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put one side up on a block and spun tire by hand . when the trans was in gear it is very dificult to turn but the moter is not turning over.

started the motor and the blocked wheel began turning.

so it is not the transfer case. it seems the clutch is not working. or clutch adjust.
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Last edited by sethwyo; 04-23-2018 at 12:04 AM.
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Old 04-23-2018, 12:06 AM
sethwyo sethwyo is offline
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this is why i couldnt make it as a mechanic i cant trouble shoot problems. it is not stuck in nutral. somethin in the clutch.
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Old 05-09-2018, 11:37 PM
Selena Selena is offline
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Slave cylinder.
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Old 05-29-2018, 08:42 PM
Lurch Male Lurch is offline
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Quote:
Originally Posted by sethwyo View Post
put one side up on a block and spun tire by hand . when the trans was in gear it is very dificult to turn but the moter is not turning over.

started the motor and the blocked wheel began turning.

so it is not the transfer case. it seems the clutch is not working. or clutch adjust.
So, does the truck move when you try and drive it now?
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Old 05-30-2018, 01:53 AM
sethwyo sethwyo is offline
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no it still does not go. i bled some air out of the slave cylinder from the allen bolt on bottom. now the clutch has no life to it. no resistence. im trying to find instructions on removing and replacing the slave cyl as selena said.

iv never worked on one of these before.
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Old 05-31-2018, 05:11 PM
Lurch Male Lurch is offline
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Quote:
Originally Posted by sethwyo View Post
no it still does not go. i bled some air out of the slave cylinder from the allen bolt on bottom. now the clutch has no life to it. no resistence. im trying to find instructions on removing and replacing the slave cyl as selena said.

iv never worked on one of these before.
On a lot of pickup trucks, you have to remove the transmission to change out the slave cylinder.
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Old 05-31-2018, 05:35 PM
Lurch Male Lurch is offline
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I don't think the slave cylinder is your problem. If the slave wasn't working, your transmission would still be in gear. You just wouldn't be able to shift gears too well. The slave cylinder's job is to engage the clutch, so you can shift smoothly. Most truckers don't even use the clutch to shift. However, if your clutch is worn out, it will slip, acting like a false neutral.
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