no 4x4

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no 4x4 - 12/28/2007 2:43:36 PM

punx.inc

Posts: 26
Joined: 10/1/2007
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i was climbinga hill in the snow, and engaged the four wheel drive, locked in the hubs, and nothing was going to the front. the tranfser case engaged in 4h and 4l at the actual case, but nothing is going to the wheels. the front driveshaft was even spinning crazy as i floored it. can hear hubs engaging, so its not that for sure. and the tranfser was going into gear. so why wont it send power to the front? 86 blazer, 700r4 np208, engine is 350 from a 77 truck. can anyone help me out?

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rebuilt 350 small block, 350 turbo, np205, corporate 10 bolts
3 1/2 foot long 2.5in dual straight pipes w/ cherry bombs

"I''ve only just begun!"

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RE: no 4x4 - 12/28/2007 2:53:37 PM

swartlkk

Posts: 14472
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

If only one hub was actually locking in, it would act as though no power was being sent to the front. Can you have someone watch either of the axle shafts at the steering pivots? This would help you to pin point which one is at fault. You could do this in your driveway with the rear end on jack stands.

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Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to punx.inc)

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RE: no 4x4 - 12/28/2007 3:15:59 PM

punx.inc

Posts: 26
Joined: 10/1/2007
Status: offline

already did it. the front drive shaft wont even spin. its like there isnt anything going to that drive shaft. but likei said, its going into gear at the case, just nothing is coming out of the front.

_____________________________

rebuilt 350 small block, 350 turbo, np205, corporate 10 bolts
3 1/2 foot long 2.5in dual straight pipes w/ cherry bombs

"I''ve only just begun!"

(in reply to swartlkk)

Post #: 3

RE: no 4x4 - 12/28/2007 6:07:33 PM

swartlkk

Posts: 14472
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

Ok so I'm confused... The transfer case is engaging properly, but the driveshaft between the transfer case and the front axle is not turning? Even with the front hubs engaged?? I guess I thought that the front driveshaft was being powered by the transfer case, but the wheels were not spining...

_____________________________

Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to punx.inc)

Post #: 4

RE: no 4x4 - 12/29/2007 12:11:53 AM

punx.inc

Posts: 26
Joined: 10/1/2007
Status: offline

iknow, its messed up. but it is engaging. you can feel it shift into the gears. i was thinking maybe the chain was broke or something, i dont know.

_____________________________

rebuilt 350 small block, 350 turbo, np205, corporate 10 bolts
3 1/2 foot long 2.5in dual straight pipes w/ cherry bombs

"I''ve only just begun!"

(in reply to swartlkk)

Post #: 5

RE: no 4x4 - 12/29/2007 12:56:46 AM

Chevy Lover

General Tech Moderator
Posts: 3411
Joined: 6/11/2006
From: Vancouver. B.C. Canada
Status: offline

If the case is not driving the front shaft, it probably is a broken chain.
Here's a diagram of the np203, scroll down for the exploded diagram.
http://www.offroaders.com/tech/Diagrams/np203.htm

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Give a man a fish and he will eat for a day, teach a man to fish, and he will sit on a boat drinking beer for a life time

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RE: no 4x4 - 12/29/2007 1:34:46 AM

punx.inc

Posts: 26
Joined: 10/1/2007
Status: offline

thanks for the diagram of the 203, but, it has a 208 in it. i just saw that typo in my signature, ill get that fixed.

_____________________________

rebuilt 350 small block, 350 turbo, np205, corporate 10 bolts
3 1/2 foot long 2.5in dual straight pipes w/ cherry bombs

"I''ve only just begun!"

(in reply to Chevy Lover)

Post #: 7

RE: no 4x4 - 12/29/2007 1:47:39 AM

Chevy Lover

General Tech Moderator
Posts: 3411
Joined: 6/11/2006
From: Vancouver. B.C. Canada
Status: offline

It's still probably the chain.
http://www.drivetrain.com/208transfercasesillust.htm

_____________________________

Give a man a fish and he will eat for a day, teach a man to fish, and he will sit on a boat drinking beer for a life time

(in reply to punx.inc)

Post #: 8

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