IowaTom Posted April 8, 2023 Share Posted April 8, 2023 Guys - I was running an errand this morning and on my way home, tried to downshift from fourth to third and it wouldn't go in. !!! Pulled over to the shoulder, tried 2nd and it went in fine. Still no third gear, so shifting from 2nd to 4th just to get home. Once in the garage, tried "granny" first; nuttin'! I've determined I have 2nd, 4th and reverse. What the heck... Why all at once with no warning did my tranny break, you suppose? Wasn't hauling or pulling anything. I'd bet having a transfer case makes it more complicated to remove, right? Oh well, it always something. :-) Link to comment Share on other sites More sharing options...
81-F150-Explorer Posted April 8, 2023 Share Posted April 8, 2023 Sounds like a shifting fork problem to me. What tranny do you have? T-18? Link to comment Share on other sites More sharing options...
IowaTom Posted April 8, 2023 Author Share Posted April 8, 2023 Sounds like a shifting fork problem to me. What tranny do you have? T-18? I'll go out and get under it! Stay tuned! Link to comment Share on other sites More sharing options...
IowaTom Posted April 8, 2023 Author Share Posted April 8, 2023 I'll go out and get under it! Stay tuned! I couldn't find anything but "C" and a line of numbers. I know BW tranny's clearly mark their T designations on the older ones, but maybe you fellers would know what this monster is. Link to comment Share on other sites More sharing options...
FuzzFace2 Posted April 8, 2023 Share Posted April 8, 2023 I couldn't find anything but "C" and a line of numbers. I know BW tranny's clearly mark their T designations on the older ones, but maybe you fellers would know what this monster is. Well it is 1 of 2 transmissions T18 or NP435 Before pulling the trans I would pull the top cover to give a look see as it could be a shift fork. Just make sure the trans is in neutral before pulling the stick or cover off the trans. Dave ---- Link to comment Share on other sites More sharing options...
IowaTom Posted April 9, 2023 Author Share Posted April 9, 2023 Well it is 1 of 2 transmissions T18 or NP435 Before pulling the trans I would pull the top cover to give a look see as it could be a shift fork. Just make sure the trans is in neutral before pulling the stick or cover off the trans. Dave ---- Thanks, Dave, I'll do that and report back! Link to comment Share on other sites More sharing options...
IowaTom Posted April 10, 2023 Author Share Posted April 10, 2023 Thanks, Dave, I'll do that and report back! I'm assuming I remove the bolts around the perimeter of the tranny's top? Nice that I'm able to get to it as easily as I can! Link to comment Share on other sites More sharing options...
IowaTom Posted April 10, 2023 Author Share Posted April 10, 2023 I'm assuming I remove the bolts around the perimeter of the tranny's top? Nice that I'm able to get to it as easily as I can! Sorry...this angle is better. Link to comment Share on other sites More sharing options...
IowaTom Posted April 11, 2023 Author Share Posted April 11, 2023 Well it is 1 of 2 transmissions T18 or NP435 Before pulling the trans I would pull the top cover to give a look see as it could be a shift fork. Just make sure the trans is in neutral before pulling the stick or cover off the trans. Dave ---- Turns out, it's a NP435. I pulled the top cover and shortly noticed a spring that seems to have popped out of a synchro and the synchro itself is very wiggly. The shift yokes are fine and even the plastic inserts are still there. Ugh! I'm probably going to have to drop the trans for the fix. Mine would be a 4X4. Any clues on how to get it out? Thanks Guys! Link to comment Share on other sites More sharing options...
Gary Lewis Posted April 11, 2023 Share Posted April 11, 2023 Turns out, it's a NP435. I pulled the top cover and shortly noticed a spring that seems to have popped out of a synchro and the synchro itself is very wiggly. The shift yokes are fine and even the plastic inserts are still there. Ugh! I'm probably going to have to drop the trans for the fix. Mine would be a 4X4. Any clues on how to get it out? Thanks Guys! I don't remember the shift pattern on the NP435, but I'm guessing that the problem is just the shift linkage rather than internal to the transmission. There's a diagnosis section in the General Manual Transmission Service document, which you can find at Documentation/Driveline/Transmissions/Manual Transmissions/General Manual Transmission Service. And there's instructions on how to remove the transmission in the page at Documentation/Driveline/Transmissions/Manual Transmissions/NP435. Link to comment Share on other sites More sharing options...
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