Transfer case issues... HELP!
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Transfer case issues... HELP!
I finally got my '77 F250 registered. I took it for a short drive and I seem to be having some issues with the transfer case. I would appreciate any advice on these issues. I have a C6 Auto trans and a divorced transfer case. I think it is an NP205, but if someone could tell me how to confirm it that would be great.
The problems I'm having:
1: I can't seem to "find" 2H. Either the truck doesn't move at all, or it locks in the front shaft as well. I have the **** on the shift handle that shows the shift pattern, but it isn't too much help.
2: When both shafts are locked in, it will drive a little ways, but it will just pop out into neutral from whatever it is in.
Thanks,
Jason
Oh, and here's a picture of it. I have the rest of the trim, it just needs to be cleaned up and installed.
The problems I'm having:
1: I can't seem to "find" 2H. Either the truck doesn't move at all, or it locks in the front shaft as well. I have the **** on the shift handle that shows the shift pattern, but it isn't too much help.
2: When both shafts are locked in, it will drive a little ways, but it will just pop out into neutral from whatever it is in.
Thanks,
Jason
Oh, and here's a picture of it. I have the rest of the trim, it just needs to be cleaned up and installed.
Lead Driver
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Pull it all the way back to 4H and then move it up forward one to 2H and try it. Does it have a distinctive click when shifting it ? There are 2 ***** with a spring held in by a threaded cap on the top, thats what holds it in gear.
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It seems to engage 4L solidly, but I can hardly feel the change between the other positions. I can bring it back to 4H, then forward to 2H, but sometimes it stays in 4 wheel, and sometimes it just jumps to neutral or back into 4H. It simply refuses to run in 2H. What is involved in checking the ***** and spring? Where exactly are they located?
Thanks,
Jason
Thanks,
Jason
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I don't know a whole lot about the 205 but I know it has shift forks just like a manual tranny. Since the 205 can be twin sticked I'm guessing that one shift fork puts the rear axle gear set into lo, hi, or N and the other shift fork puts the front axle into lo, hi, or N. Sounds to me like your shifter is only shifting the front axle gear set. This could be the shift fork having come loose from the shift rail, or one of the shift rails not moving at all.
I would get under the truck and position yourself if you can to where you can see the shifter linkage connects to the two shift rails (big, thick dowels, about 3/4 inch diameter, that stick out of the top of the t-case about 1/4 to 1/2 inch. Then have someone cycle the shifter and you watch and make sure the linkage is moving both of the shift rails. If not, that's a problem, if yes, then I would bet that you have to take the t-case out and open it because one of the shift forks has come loose from it's rail.
P.S. Nice truck, even being an automatic I'd be willing to trade dents with you and take your t-case problem off your hands
I would get under the truck and position yourself if you can to where you can see the shifter linkage connects to the two shift rails (big, thick dowels, about 3/4 inch diameter, that stick out of the top of the t-case about 1/4 to 1/2 inch. Then have someone cycle the shifter and you watch and make sure the linkage is moving both of the shift rails. If not, that's a problem, if yes, then I would bet that you have to take the t-case out and open it because one of the shift forks has come loose from it's rail.
P.S. Nice truck, even being an automatic I'd be willing to trade dents with you and take your t-case problem off your hands
Last edited by 91Bronc300; Sep 24, 2011 at 08:27 PM. Reason: grammer and P.S.
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Lead Driver
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A shift fork won't come loose from it's rail but they can break, and by all means check the linkage over as stated above before removing it. You will see two caps on the top of the transfer case, under them is a spring and a ball. I've never seen anything go wrong there but that is what holds it in gear.
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