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#1 |
Registered User
Join Date: Aug 2007
Location: Mountain View, Alberta, Canada
Posts: 415
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73 4x4 will not move?
So I was just doing an engine flush as I now have my engine running and thought I would put it in gear and see how the clutch felt. Well it did not move although I thought I could hear the clutch engage!
MY QUESTION IS: With the NP 203 full time transfer case and no front drive shaft bolted up should it still move when put in gear? Where else should I look if it should move without front driveshaft? 56hotrodred (Barry) |
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#2 |
Another Day, Another Dollar
Join Date: Nov 2008
Location: North Vancouver, BC
Posts: 1,316
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Re: 73 4x4 will not move?
you need to shift to 4 hi loc or 4 lo loc.
there is an interaxle differential in there that walks if your not in one of the loc positions and a driveshaft is out, UNLESS you have a milemaker kit installed. shifting to the "loc" positions locks the interaxle diff up and your get equal power to the front and rear d shafts. when your not in loc it acts like an open diff
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-78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square" ![]() |
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#3 |
Registered User
Join Date: Aug 2007
Location: Mountain View, Alberta, Canada
Posts: 415
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Re: 73 4x4 will not move?
Thanks for the reply. Maybe it is just me!!!
I am looking at the Milemarker Kit with hubs. I was trying to shift the transfer case around but it seemed to make no difference. I did not have time to check out the linkage. I bought the truck from a mechanic in town who said he put in a new clutch and a used motor for a customer many years ago and the guy never came back or did not want to pay or something... 56hotrodred (Barry) |
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#4 |
Another Day, Another Dollar
Join Date: Nov 2008
Location: North Vancouver, BC
Posts: 1,316
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Re: 73 4x4 will not move?
did you get transfer papers signed for that truck??
i know out here in BC when that happens there is a huge pile of red tape in order to take over ownership of a vehicle when that happens. also, the linkage on those 203's gets bunged up really easily. try and get around the case and hit it with some penetrating oil. I don't know about the 73's but my '78 has a bolt in tranny hump that is very convenient for accessing the linkage,
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-78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square" ![]() |
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#5 |
Registered User
Join Date: Aug 2007
Location: Mountain View, Alberta, Canada
Posts: 415
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Re: 73 4x4 will not move?
I actually just talked to the mechanic about that about a month ago. I have had the truck now for several years and actually forgot about it for a while. He says not a big deal at all as he has done this many times before with similar acquisitions and other vehicles he has sold.
He says he can simply write me a bill of sale to take to the insurance company to get it insured. After that I take the proof of insurance to the vehicle registration and get plates. They don't even ask for ownership papers. I may have to get a safety check as it has been off the road for many years. Things are way different here in Alberta than in BC. 56hotrodred (Barry) |
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#6 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 73 4x4 will not move?
if it's a 203 the 4 wheel lock light should come on
i had mine a while before i figured it wasn't going into 4X4 I then got it stuck in 4X4,but have manual hubs,and a"kit" in the tcase mine had to be cleaned up under it to get it to move out of lock lubed and someone up top moving while used a tire iron gently underneath at the switch PO told me the light didn't work,it does and here i need an afidavid(spelling)to get an ownership done . my 79 is not in the system.....said it goes back 15 years.but i'm in Ont
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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#7 |
Another Day, Another Dollar
Join Date: Nov 2008
Location: North Vancouver, BC
Posts: 1,316
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Re: 73 4x4 will not move?
i always wondered what that unhooked wire coming from my t case was.
where is the receptacle that it plugs into?
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-78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square" ![]() |
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#8 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 73 4x4 will not move?
it should be right there....but quite exposed to may have caught something or rusted...
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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#9 | |
Ridin' Dirty
Join Date: Oct 2009
Location: Ardrossan Alberta Canada
Posts: 2,193
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Re: 73 4x4 will not move?
Quote:
I also have a 203 T case (but with an auto tranny) and I put the truck in drive one day and felt the transmission go into gear and it also didn't move. One of the manual hubs (installed by PO) was unlocked, and the T case was spinning the front driveshaft, but not the rear shaft. A different time, I tried moving the truck with the rear driveshaft disconnected, and it wouldn't spin the FRONT shaft when I put it in drive! I was told the 203 acts like an open differential and will spin whichever shaft has the least resistance and only works when BOTH driveshafts are installed and the front hubs must be locked.
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1978 C3500 Crewcab (Project) 1979 C2500 Crewcab (Driver/project) 1988 R2500 Crewcab (Driver) 1988 V3500 Crewcab 1988 R2500 Crewcab (Mint, Ex Fire Dept) 1968 Chev Suburban (4x4 conversion) LINK 1970 Chev C20 Suburban (driver/cruiser)LINK 2005 Impala (Incognito vehicle) 2004 Yukon XL Denali (Kid hauler) 1947 Case tractor Facebook Page(1000's of pictures of GM cars and trucks organized into albums) YouTube Channel |
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#10 |
Slots go on anything!
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
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Re: 73 4x4 will not move?
From the factory, both front hubs are constantly locked. I think if the case is put into the "Loc" position, it will move. Admittedly, it has been almost 15 years since I have had a 4WD with a 203 case, though.
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1974 Jimmy- 5.3/4L80e/NP241 |
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#11 |
Ridin' Dirty
Join Date: Oct 2009
Location: Ardrossan Alberta Canada
Posts: 2,193
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Re: 73 4x4 will not move?
Yeah, I'm guessing that the previous owner of my truck didn't know that installing manual hubs wasn't a good combination with this T-case
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1978 C3500 Crewcab (Project) 1979 C2500 Crewcab (Driver/project) 1988 R2500 Crewcab (Driver) 1988 V3500 Crewcab 1988 R2500 Crewcab (Mint, Ex Fire Dept) 1968 Chev Suburban (4x4 conversion) LINK 1970 Chev C20 Suburban (driver/cruiser)LINK 2005 Impala (Incognito vehicle) 2004 Yukon XL Denali (Kid hauler) 1947 Case tractor Facebook Page(1000's of pictures of GM cars and trucks organized into albums) YouTube Channel |
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#12 | |
Another Day, Another Dollar
Join Date: Nov 2008
Location: North Vancouver, BC
Posts: 1,316
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Re: 73 4x4 will not move?
Quote:
the 203 was designed to be a full time case. installing the mile marker (maker?) kit disables the interaxle differential in the transfer case and allows you to drive in 2wd. http://www.4wheeloffroad.com/howto/47538/index.html
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-78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square" ![]() |
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#13 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 73 4x4 will not move?
the front would look like this
also when the front drive shaft ia being drivin(not just moving), its lubing the front, no drive, no oil
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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#14 |
Registered User
Join Date: May 2008
Location: Waukesha, WI
Posts: 904
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Re: 73 4x4 will not move?
not exactly, full time hubs make the ring gear spin, which lubes the bearings. Install lock outs and the the ring gear does not spin, which doesn't require lube. The hubs use taper bearings that are packed with grease.
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#15 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 73 4x4 will not move?
so with Lock outs(manual hubs turned off) you don't have to worry about engageing the front once and a while.....it dosn't need the lubeing?
I don't know how mine was done but, i've been told min once a month use it, to lube it or lose it wondering cause the PO said the lock light didn't work......but it does in the right place as stiff as it was i don't think he ever had it in and that was sort of the standard i went with even on the 208's in the 87 and 88
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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#16 |
Registered User
Join Date: Dec 2010
Location: Pittsburgh, PA
Posts: 1,009
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Re: 73 4x4 will not move?
I've never seen a 4 speed truck with a 203 T-case. That's different! Anyway, I'm pretty sure what people were referring to (when talking about keeping things lubed) is inside the transfer case itself. If you convert the 203 to part time with the Mile Marker kit, throw it in 4x4 every once in a while to lube the rest of the transfer case.
EDIT: Here is a link that explains it better. http://www.fullsizechevy.com/forum/g...onversion.html
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Steve Member of the Foot Pedal Club '83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL, Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws, 350 HP 350 crate engine from Jegs, Turbo 400 ![]() Last edited by Your41Plague12; 10-23-2011 at 07:21 PM. |
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#17 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 73 4x4 will not move?
for me it's about once a month with the 208s(of course more in winter)
but getting this 78 203, somebody here advised me bout the "kit" not lubing the insides but i said i had run it in 4X4 like before or so i thought was told could run with free hubs, start once week in 4X4 with the light on ,to lube push out of 4X4 into 4X2..... then one big snow storm i engaged the hubs , i pulled it into 4X4 and the drive kicked in(with light) I laughed so hard all the way to work,and home after.....till it wouldn't come out lol
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 Last edited by motornut; 10-24-2011 at 08:31 AM. |
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