73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => 4 Wheel Drives => Topic started by: Yamaha74 on December 06, 2010, 10:30:18 AM
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I just bought a 1984 4x4 and the 4wd shifter stick is missing or broke off. I am not sure what it is supposed to look like to be able to tell if it is broke. I kind of looks like it is. The guy I bought it off of said that the previous owner let the truck sit for a while so he is thinking that the guy tried to force it into 4wd drive and broke the shifter. He did say that the guy got under the truck and did something to put the truck in 4wd to show him that it worked. Any thoughts on this and where I might find a new shifter?
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What transfer case does it have? In another post didn't you mention that it's a 2wd cab? That would have the low hump. If it will work for you I have the shifter assembly from an 84 that had an np208.
I'm sure he went under and just manually moved the arm on the t-case to engage it.
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What is the best way to confirm what transfer case it has? I can look tonight. I would be interested in your shifter assembly if it works for my truck.
You are correct, it is a 2wd cab. Why do they have low humps?
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2wd's have no transfercase so do not need high hump.
Look at the tag on the back of the case.
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http://forum.73-87chevytrucks.com/smforum/index.php?topic=11838.0
Do you just need a replacement piece for something that is broken, or are you missing a whole bunch of stuff because it was never converted over? Does the truck have a body lift in it or is the floor modified? Take some pics and find out what t-case you have. An 84 would most likely have an NP208 in it. Like Vile said find the ID tag. Also, if the housing is aluminum its a 208.
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Supposedly the truck has a 4" lift on it. I believe the truck the cab came off had a standard transmission and I know it was 2wd. The reason I believe it was a standard tranny is becuase there is a patch on the hump covering a hole to the left of where the 4wd shifter goes. I will take pictures tonight and I will see if I can find the ID on the transfer case.
So if I have a low hump then the only way that the transfer case will fit is if there is a body lift on the truck, is that correct?
I appreciate everyones help and sorry to ask amateur questions.
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So if I have a low hump then the only way that the transfer case will fit is if there is a body lift on the truck, is that correct?
To my knowledge, yes, unless the floor of the cab has been modified.
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Its prob a 208 but just incase, Here is some Id for the 203 and 205...
http://www.chuckschevytruckpages.com/drivetrains.html
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Unless the 203 and 205 rear tail shafts are interchangeable I have a 205 with the speedo cable on the drivers side like chuck shows for the 203 but mine is older pre 75 or something like that the tag is on the front of the transfer case
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While I am trying to figure out how to post pictures here are the numbers on the back of the transfer case. They were in two different spots. Please help me identify which case I have. I also took a picture of it but need to resize my pictures somehow.
On the top right:
W
C-11890
L-27
On the bottom left:
LO-2
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What's your shift pattern. Also host the pic on photobucket.com then use the [ Img] code for forms and past that here
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Is the case aluminum? Also could you see what might be missing or broke while you were under there?
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I resized the pictures. Here you go.
Irish_Alley - I do not know my shift pattern because I am missing the 4wd shifter.
I still am unable to determine what might be missing or broke as far as the 4wd shift lever goes. Maybe the pictures might help you guys out.
While I was under the truck last night I noticed something that doesn't look right. Look at the picture with the big gear with teeth. What is that and should it be covered up? It looks like it should have something to do with the tranny. I am thinking a cover is missing.
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Here are some more pictures including the one with the gear I mentioned in my last post.
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Ok that gear is the flywheel and it should have a dust cover. But its ok. The transfer case is a 203 the sufficient paternal is
4x4 low lock
4x4 unlock
N
4x4 high unlock
4x4 lock
transmission is a th350 I think
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Ill take some picks of the shifter on a 203 in a little bit
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I was told that the tranny is a 700R4. I guess I need to double check that tonight.
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It's hard to tell from that pic. A 700r4 has a square pan on it. Do you have OD?
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The steering column shows that I have overdrive. When I drove it home last week it was dark and the dash lights don't work so when I first left the guys house I was on a road with a 55mph speed limit and the truck sounded like it was screaming at high RMP's so I shifted the shifter lever down and the truck shifted one more gear higher although it still seemed like it was pretty high RPM's. So I am assuming that I was in drive when I first took off and then shifted it into overdrive. But I just looked at a website that shows pictures of the pans and I do believe my looks like the TH350 because I seem to remember the cut out in one of the corners. I will check again tonight. Also this would probably make sense on why the RPM's were so high and it sounded like the truck only shifted two times after first gear. The TH350's are 3 speeds, right? I wonder though why it seemed like it shifted into a higher gear when I dropped the shifter one notch.
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Transfer case might have been in low that's why it was screaming. Lol ill have those pics up in a minute. And yes the th350 is only 3 speed
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(http://i333.photobucket.com/albums/m387/rebel_cowboy_83/IMG_20101207_133356.jpg)
(http://i333.photobucket.com/albums/m387/rebel_cowboy_83/IMG_20101207_133406.jpg)
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Thanks for the pics. It looks like I am missing the L bracket that the shifter bolts to. I bet it is what broke inside of the box. Mine also does not have that silver cover that the bracket comes through. Is there somewhere to order these type of parts or do I need to go to a junk yard?
Also, I bet your right about the transfer case being in low. I hope that is what it was.
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Yard or find someone that has one laying out in their backyard
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I have confirmed that I do have a TH350. I was told it was a 700R4 by the PO.
Now I need to get the 4x4 shifter parts so I can find out if it is locked into low gear.
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You can manipulate it by hand just pull it all the out towards the front of the truck. If you look at the pics I think its in “4x4 high lock”
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Do I do this from underneath the truck? Looking at your pictures there looks like there is two bars. Does only one actually move? You are saying pull it towards the front of the truck which would move it from 4x4 high to 2x4 high, correct? That's if it is currently in 4x4 high.
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What year trucks were the NP203's used in? I know that my cab is a 1984 but I am trying to figure out what year the frame and drive train is. Also, what oil should I use in the 203? I have seen some people saying 10w-40 and othe saying 10w-30.
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203 were on 71-79 with a th350. Yes from under the truck you can change. One bar controls hi-low while the other I think is for lock unlock the 203 is a full time unit meaning if you unlocked you still turn front and rear wheels which ever has less resistance lock means both axles get the same power. Yours still should all be connected underneath so try pulling at those bars
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I am pretty sure my 203 has the conversion kit on it because I have the manual locking hubs on the front. Do you know what oil I am supposed to use in the 203? Also, is there a way to tell what year my frame is?
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10-40. The fame you can tell by the cross members and the vin well part of it anyway it would be somewhere on the top drivers side from the engine cross member to the fuel tank location.
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This might help...
(http://i222.photobucket.com/albums/dd224/74chevy/75IMG_FramepaintedwithPor15028.jpg)
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Ok, so I tried to move the bars from underneath the truck and I couldn't get them to move. It seems like if I had a shifter in the cab it would be all the way in the back positon or in other words 4x4 High lock. Because underneath it seems that the bar is pushed all the way forward because it won't budge if I try to push it towards the front of the truck. If I try to pull it towards the back of the truck it does budge but I can't get it to shift to the next gear. Do I need to move the arm from side to side first before it will move front or back. When looking at the shift pattern that you guys showed me it only looks like it move from front to back. Also does the truck need to be running while trying to do this?
Also, I found the plate on the transfer case and it is definately a 203 and the serial number is 1978 so does that mean it is from a 1978 truck? The Assem No. 476742.
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I found a truck with a 203 that I can get the shifter parts off of. I took the bolt out of the shifter assembly but nothing really happened. I was hoping that the whole shifter and "L" braket would come out. The shifter is bolted to the "L" bracket so I can get it off no problem, but I also need the "L" bracket that it is bolted to. Do I need to take something else apart before the "L" bracket will come out?
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i would try and take the whole thing not just the l bracket. just because you dont know what else is wrong with it why it was taken off in the first place or if its all put back together right
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Irish_Alley, Can you look at my post from 12/9 and let me know if you can answer any of my questions? I appreciate it.
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Try to take a pic of the linkage. See if we can help about the year how does your front shaft connect to the front out put shaft.
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Here are pictures of the linkage. I got back under their tonight and was able to get the linkage to move. I was able to pull the linkage towards the back of the truck to where the front drive shaft now moves freely. Before it would only spin about a inch before it stopped. It must have been in either 2x4 high or 4x4 high. Will the drive shaft spin freely if it is in 2x4 high or just when it is in neutral? I guess I am still trying to find out if I have the conversion kit on my 203. I do have manual lock out hubs.
You will see in the first picture the two brackets are angled towards the front of the truck and the second picture they are straight up and down. With them being straight up in down, does that mean it is in neutral.
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More pictures showing the front drive shaft and some of the frame. Hopefully this will help you identify the year of the frame and drive train. At this point I have not found a vin/serial number on the frame. I think I would need to take my cab off to see the number but I am not sure.
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It’s a 78-80 drive shaft due to it having that flange and not a "ubolt" style where the shaft mates to the case so that tag should be right. As far as the linkage goes not sure off the top of my head have to mess with the one that I showed ya before but. With the part time kit installed the front shaft will move freely in neutral and in 4x2
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Ok thanks for the info. I will keep playing with the linkage. What is neutral used for and will the truck go in gear when the T-case is in neutral?
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Truck will go in gear but you wont go anywhere its the same as neutral for the transmission
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Ok, I finally was able to get a donor shifter assembly for my 203 but it came from a truck with a TH400 in it and my truck has a TH350. The case that holds all the internals is a little different on the TH400 so I swapped the internals from the donor truck and put it in the case off my truck with the TH350. I then bolted the shifter assembly back in the truck but I can only get the thing to operate the lever furthest away from the transfer case which I believe operates the 2x4 and 4x4 high gears and not the low gears. The lever closest to the transfer case is not moving. I am assuming I put the internals parts of the shifter assembly in incorrectly.
Does anybody have any hints or suggestions?
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Yamaha, this might help a little. When you open the link scroll down a little and click on linkage adjustment. There's a nice exploded view of your case, and the procedure to realign your shift bars.
Also try putting the transmission in nutrel, then shift through the range of the Transfer case, make sure your hubs are locked or unlocked.
http://www.chuckschevytruckpages.com/drivetrains.html
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I have seen this before but I guess I just figured mine was fine, but maybe that is the issue. I went to a junk yard again yesterday and picked up a shifter assembly from a 203 that was bolted to ta TH350. The one I got from the junk yard before was bolted to a TH400 and the shifter assembly case was a little different so I just took the parts and swapped them into my case. So now with one from a TH350 I am hoping I can just put it in there and everything will be good but I probably do have an adjustment problem because the new one I got yesterday seems to move just like the one I swapped the internals out of. I am going to head out to the garage now and put the new one in and do some adjustments.
The only thing that I don't think I have is the gage pin (J). Is that needed to do the adjustment. The other thing I am worried about is whether any of the adjustment bolts will brake loose. I will give it a shot and report back.
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Yes the Gage pin will be needed, But you can use anything that will fit the hole..Like an 8 or 10 penny nail, maybe a piece of a coathanger. Take some PB Blaster..Liquid wrench or something to help loosen up the crud on your Bolts, Maybe a good wire brush to clean it all up.
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I dont remember what size, but you can use a drill bit to guarantee the right size.
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my shifter on my 205 screws up sometimes also if I put it in 4low it will sometimes not engage the rear and only the front will turn kind of weird having a front wheel drive truck in the mud. But mud is my problem its kind of glues the linkage together just have to clean it out
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I got the shifter assembly moving both the bars now so hopefully tomorrow I will start it up and see if the 4wd works. I also did check the adjustment and it seems like it is lined up perfect so I didn't need to adjust it
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Good Deal! I would check the fluid level also. Top it off with some 10w40
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Good call. I will check the fluid level and top it off if needed. 10w-40 is what is recommeded?
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Yes 10-40
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I would drain it all and put fresh 10w40 in. Never know what the previous owner used. Plus, what truck doesnt like fresh fluids?
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How much oil does it hold and does anybody use any particular brand of oil?
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http://forum.73-87chevytrucks.com/smforum/index.php?topic=18701.0
Any brand will work.