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1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck

1975 F100 Married Transfer stuck..?

 
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Old 03-03-2019, 05:34 PM
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1975 F100 Married Transfer stuck..?

So my truck is as the title says, 1975 f100 xlt. I am having problems getting it to shift down to low. Goes into 4H no problem, if not a little loose (easy to knock out of gear if you wanted to). So here is my problem, I have a weird shift pattern on the stick. I'll post pictures. I have read through the forums and have not seen this pattern on another post. It will push forward but wont push to the right and up as the shifter **** indicates. Anyone have similar problems or seen this pattern?
 
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Old 03-04-2019, 01:45 AM
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Shift **** pattern indicates you have a New Process 203 (full time transfer case) Double check by locating the blue silver/ID tag on the front of the box.



Does the truck have a body lift? Has it EVER went into 4 low? Have you inspected the linkage? Looks like some new carpet is around that shifter and I doubt that is causing you problems? Does or do you know it the transfer case has a part time conversion? Like instead of full time hubs (on the front axle) it has part time (lock in- lock out installed? Read up below for a detailed explanation of the part time kit and some more 203 info.

http://www.f150hub.com/drivetrain/np203.html

http://www.off-road.com/trucks-4x4/t...ech-20599.html

http://www.fourwheeler.com/how-to/47538/
 
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Old 03-04-2019, 06:26 AM
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Full time 4wd info:




 
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Old 03-04-2019, 06:33 PM
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The carpet is not factory but I have pulled it out thinking maybe that was the problem and it is not. Previous owner stated that it would go into low at one time, I have never gotten it into low myself or seen it go into low. It has locking hubs that previous owner had installed, stating the hubs were worn out. As for inspecting the linkage, besides peering into the hole for the shifter and not noticing anything obvious on the outside of the case I have not taken it apart yet. Is there an easy way to break it open and inspect it? It isn't even spongy when pushed forward but feels like steel on steel. Perhaps bound up inside the case. Thanks for the info, that is much more information than I had before.
 
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Old 03-04-2019, 06:40 PM
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So reading that manual, correct me if I am wrong but HI and HI Lock are two different settings. Does this mean that HI Lock would "lock in" the hubs? Or does this mean it switches the transfer gears to a different ratio? Second question.. would it be worth me trying to fix this case or replacing it with an aftermarket case if it is in fact damaged?
 
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Old 03-04-2019, 08:03 PM
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Other than pulling carpet and if it is a manual trans you should be able to remove the trans hump cover to insp linkage. Sounds like you have a full time xfer case and then PO installed manual hubs. Did he install the part time kit in the transfer case ?

Those above links in post # 2 explain the part time kit set up better than I can. Those shift directions above are for an OEM set up NP-203, with the manual hubs being installed and not knowing if the PO did the rest of it hard to say.

Aftermarket like Atlas transfer case...$$$$$$ should not that bad to figure out what is wrong with yours and repair or even better swap in and upgrade to a NP-205 actual OEM part time case.
 
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Old 03-04-2019, 08:06 PM
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When shifting to lo are you in neutral with the truck at idle?
 
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Old 03-05-2019, 09:13 AM
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Originally Posted by 77&79F250 View Post
Did he install the part time kit in the transfer case ?

Aftermarket like Atlas transfer case...$$$$$$ should not that bad to figure out what is wrong with yours and repair or even better swap in and upgrade to a NP-205 actual OEM part time case.

Doubtful that he installed the part time kit other than the hubs. PO didnt seem to know much about working on/diagnosing mechanical issues. Long story there.
Guess my last question after doing research would be, this is an automatic transmission, would the NP205 mount up? Perhaps from another automatic truck? Would it matter if it was originally in a Ford or could it be out of a GM AMC or the like? Sorry if I am asking what seems to be obvious questions but I am kind of new to the dentsides and fords in general. Hell, trucks in general. Lol
 
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Old 03-05-2019, 09:17 AM
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Originally Posted by ford390gashog View Post
When shifting to lo are you in neutral with the truck at idle?
Yes sir, I tried every combination of transfer case shifting that I know. All I can figure is it's either bound up in the case or the shifting bracket is bent from someone trying to force it. Although, this thing seems like a pretty substantial piece of steel all around so I am skeptical on it being bent.
 
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Old 03-05-2019, 09:20 PM
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The NP203 needs front and rear driveshaft in sync hence why it was a full time transfercase. If your front shaft and rear shaft are not rotating at the same speed you won't be able to get into 4loc. The NP203 is easily shifted into 4loc when moving slowly, just enough to roll and you should feel the transfercase sync and the shift should go right in. If not make sure your linkages are adjusted.
 
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Old 03-11-2019, 06:08 PM
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Alright gentlemen, I appreciate all the help. For future reference for anyone wondering what the hell is wrong with their Tcase. After climbing under the truck and inspecting the shifting mechanism I came to find that the "LO" gear arm was locked in place and somehow the finger on the shifter was forced out of place therefore not able to reach the pin to push to unlock the mechanism. After a busted knuckle I managed to get the arm back into place. Moral of the story, dont force the shifter.
 
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Old 03-12-2019, 02:14 PM
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Thanks for the update, so all is well?


 
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Old 03-15-2019, 04:46 PM
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Yes sir I got her to shift, its a little rough but the linkages will take some tweaking this weekend. Thank you for all of your help guys! Sorry it took so long to respond
 

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