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1978 chevy k20


 
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jimb 8n
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Joined: 22 Jan 2017
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PostPosted: Fri Jan 24, 2020 5:02 pm    Post subject: 1978 chevy k20 Reply to specific post Reply with quote

I'm having trouble with my transfer case in my truck. It seems to slip in 4 lock when stuck in snow. Just wanted to find out what may be the reason why this happens.
 
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jimb 8n
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PostPosted: Fri Jan 24, 2020 5:06 pm    Post subject: Re: 1978 chevy k20 Reply to specific post Reply with quote

I guess I should tell you it is a full time with a np 203 transfer case.
 
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wsmm
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PostPosted: Tue Feb 04, 2020 3:10 pm    Post subject: Re: 1978 chevy k20 Reply to specific post Reply with quote

What do you mean, it seems to slip when in four wheel drive. You do know that unless you're in 4 lock, or 4 part dive the transfer case also acts as an open differential.
 
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R Pope
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PostPosted: Fri Aug 07, 2020 5:50 am    Post subject: Re: 1978 chevy k20 Reply to specific post Reply with quote

NP203 is a chain drive case. When they wear, the chain jumps. Fix it before it self-destructs.
 
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