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12-29-2012, 07:14 PM
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#1 |
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Registered User
Join Date: Sep 2010
Location: Kingston, PA
Posts: 394
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Np203 hard shifting into 4 high and low
Anybody know why a 203 would be hard shifting into 4 high and 4 low? Going into 2 is no problem. I have tried it with the truck in neutral and not moving and while moving in gear and it doesn't help. I have to literally hit the shifter as hard as I can several times before it goes into 4
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 87 GMC Sierra 2500 4x4 350/TH350/NP203 Flow Tech long tube headers, throttle body spacer, Edelbrock Performer cam, true dual Flowmaster 40s, 6 inch Superlift suspension lift 2000 silverado extended cab stepside 5.3l. Stock for now |
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12-29-2012, 08:39 PM
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#2 |
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Registered User
Join Date: Apr 2012
Location: Tuscaloosa, AL
Posts: 131
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Re: Np203 hard shifting into 4 high and low
Spray the shifter down with WD40 and try again.
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01-01-2013, 01:38 AM
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#3 |
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Registered User
Join Date: Oct 2012
Location: South Haven, MN
Posts: 109
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Re: Np203 hard shifting into 4 high and low
the 203 is a full time 4 wheel drive t case. unless it has an aftermarket 2wd kit installed its always in 4wd....
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01-01-2013, 02:21 AM
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#4 |
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Registered User
Join Date: May 2010
Location: Lewis County, WA
Posts: 1,523
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Re: Np203 hard shifting into 4 high and low
That Rube Goldberg shifter setup certainly leaves something to be desired...
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'77 K35 - 454, SM465/NP205, 4.56 D60/14bFF |
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01-01-2013, 05:32 PM
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#5 | |
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just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Np203 hard shifting into 4 high and low
Yeah, the shifter is the problem. The guts are a bunch of bacically flat plates sliding back and forth inside a non-sealed housing. They get gritty and the "lock" lever won't move. Its a fairly simple thing to remove disassemble are re-install. In most cases, it is easier to do from the top. Just pull up the floor covering and the center "hump" panel.
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01-01-2013, 07:27 PM
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#6 |
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Registered User
Join Date: Sep 2010
Location: Kingston, PA
Posts: 394
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Re: Np203 hard shifting into 4 high and low
Ok thanks. It does have the part time conversion on it. I will try just using wd-40 first to see if that helps.
Posted via Mobile Device
__________________
87 GMC Sierra 2500 4x4 350/TH350/NP203 Flow Tech long tube headers, throttle body spacer, Edelbrock Performer cam, true dual Flowmaster 40s, 6 inch Superlift suspension lift 2000 silverado extended cab stepside 5.3l. Stock for now |
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01-01-2013, 10:09 PM
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#7 |
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Registered User
Join Date: Jun 2006
Location: Idaho
Posts: 8,800
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Re: Np203 hard shifting into 4 high and low
Search for 203 twin stick. You will see why they have problems. I fought mine then modified it to work as a twin stick. Only took a couple of hours.
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1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project |
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