NP 203 problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

79Silv4x4 · 06-26-2004, 11:55 AM

I have a '79 K-10 with a TH350 and an NP203 that is still full time. Hi-loc works fine but when I put it in lo-loc the light does not come on in the dash and I can spin the rear wheels like it's only sending power to the rear--any ideas?
Thanks

LONGHAIR · 06-26-2004, 07:22 PM

You are not all of the way in gear. It is pretty common with those shifters.
They get stiff and sticky inside from the water/mud etc. It is a fairly easy thing to fix though. It is far easier off of the truck though. Pretty much all you ahve to do is take it apart, clean the plates/levers and lube it up as you put it back together. I have redone dozens of them and I've never seen anything actually broken or wrong.......just gunked up.

79Silv4x4 · 06-27-2004, 04:01 PM

Thanks LONGHAIR--I pulled the boot and cover off and lubed from the top and got it working!! It's still pretty gunked up so when I get more time I'll take everything apart and clean it up.

06-26-2004, 11:55 AM	#1
79Silv4x4 Workaholic Join Date: Oct 2002 Location: Katy, TX Posts: 1,589	NP 203 problems I have a '79 K-10 with a TH350 and an NP203 that is still full time. Hi-loc works fine but when I put it in lo-loc the light does not come on in the dash and I can spin the rear wheels like it's only sending power to the rear--any ideas? Thanks

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06-26-2004, 07:22 PM	#2
LONGHAIR just can't cover up my redneck Join Date: May 2004 Location: Columbus OH Posts: 11,414	You are not all of the way in gear. It is pretty common with those shifters. They get stiff and sticky inside from the water/mud etc. It is a fairly easy thing to fix though. It is far easier off of the truck though. Pretty much all you ahve to do is take it apart, clean the plates/levers and lube it up as you put it back together. I have redone dozens of them and I've never seen anything actually broken or wrong.......just gunked up.

06-27-2004, 04:01 PM	#3
79Silv4x4 Workaholic Join Date: Oct 2002 Location: Katy, TX Posts: 1,589	Thanks LONGHAIR--I pulled the boot and cover off and lubed from the top and got it working!! It's still pretty gunked up so when I get more time I'll take everything apart and clean it up.



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