Z71 transfer case problem

[zombie1969]

Hay Hank.You have probably fixed the problem by now.But if not try this.First see what the code is.Most likly its for the transfercase shift motor. First remove it and you will see a shaft the motor slides over.Turn he shaft manulaly with plyer or vise grips to make sure the transfercase is not internaly damaged and shifting properly.If good replace the motor.While there check for any leaks on the front dif and transfercase and fluid levels.

[Hank70SS]

No, never did fix it. I don't think there is anything mechanical wrong. It goes in and out of 4WD just fine. It'll also go into 4 LO ok. The light doesn't come until you drive it in 4WD for about 1/4 mile. Everything mechanically is doing what it's supposed to do. Like I said, seems the TCCM doesn't think it's in 4WD even though it is. That's why I think it may be the forward output shaft sensor. It tells the TCCM the front shaft is actually spinning.

[Bdubya]

http://www.chevyavalanchefanclub.com...topicseen.html

Guessing this is your problem and the parts needed. Order them thru gmpartsdirect.com, mine came to about $88. Didn't fix mine yet, parts are waiting though.

[zombie1969]

Originally Posted by Bdubya

http://www.chevyavalanchefanclub.com...topicseen.html

Guessing this is your problem and the parts needed. Order them thru gmpartsdirect.com, mine came to about $88. Didn't fix mine yet, parts are waiting though.

That doesnt make any sence.Why repair it for 88 when you can replace the whole unit for 700.Thats how gm does it and look at them there doin great.lol.

[Hank70SS]

Originally Posted by Bdubya

http://www.chevyavalanchefanclub.com...topicseen.html

Guessing this is your problem and the parts needed. Order them thru gmpartsdirect.com, mine came to about $88. Didn't fix mine yet, parts are waiting though.

No I don't think that's it. If been through those forums, the symptoms of a bad encoder motor or dash switch are different. In all my searching I found one with the same symptoms as mine and they said front output shaft sensor.

The service 4wd light never comes on at random. The transfer case works perfectly. it will shift from 2 to 4 hi to 4 low and back no problem. I know for certain it is going into 4 wd. Light only goes on after driving for a 1/4 mile or more in 4 wd.