4WD not working properly

SASCHA BATTEN

MEMBER
2000 CHEVROLET S-10
4.3L
V6
4WD
AUTOMATIC
12,000 MILES

I have a posi lock for my front differential My transfer case switches to 4wd high and 4wd low but isn't sending anything to my front wheels. What could be the problem?

Tuesday, December 17th, 2019 AT 12:11 PM

4 Replies

KASEKENNY

MECHANIC
18,907 POSTS

Can you let us know which transfer case you have? There are three options shown below. Let me know because it makes a difference. Also, can you confirm for me when you say the transfer case switches to 4WD, does that mean the light is indicating it is or the shift motor is actually engaging?

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Wednesday, December 18th, 2019 AT 5:54 PM

SASCHA BATTEN

MEMBER
3 POSTS

I can hear the transfer case shift when I put it in 4 low and put it in gear I'm in low range. I will find out which transfer case I have.

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Thursday, December 19th, 2019 AT 11:50 AM

SASCHA BATTEN

MEMBER
3 POSTS

2 speed selectable

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Thursday, December 19th, 2019 AT 11:58 AM

KASEKENNY

MECHANIC
18,907 POSTS

Okay. So when you shift to hi or lo how do you know it is going into 4WD if you are not getting movement of the front tires? Does the front drive shaft turn when in 4WD and moving? It will probably be needed to lift the 4 tires so you can test this safely.

Let me know if the drive shaft is spinning when lifted because if you are correct then there is a failure inside the case if the shaft is not spinning.

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