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I have a 1979 f150 4x4 351m that I converted from the C6 to the NP435. I have swapped out the clutch several times and can't get the clutch to disengage. The clutch fork is very stiff and has very little movement. How much is the fork supposed to move? There is some play in the clutch linkages and I am not sure if the little bit of clutch fork movement is how much their is supposed to be and the problem lies in the linkages. Does anyone know where I can get new linkage parts or what the cheapest way to convert to a hydraulic clutch would be? Also how much the clutch fork is supposed to move and how hard it should be to move by hand? Thank you guys trying to get the truck back on the road as soon as possible
I have some linkage parts laying out in my shop I’ll send you if you think it’ll help. I used a hydraulic setup on my ZF5 swap but assembled all the parts for a mechanical linkage when I wasn’t sure. I have the links and z-bar for sure. Not sure exactly what truck they came off of but from what I could tell should fit any late 70s truck. I’ll check tomorrow and post some pics of what I have.
If you could move your fork by hand it would mean your pressure plate would be totally wasted. but it doesn't need to mover very much if everything is adjusted properly.
Chances are you don't have the right parts, verify all your linkage is working properly before you look at the clutch being the problem.
Thank you very much! I think I know I am missing a bracket that goes on the other side of the Z bar but I am not sure what else. I can't seem to find this bracket anywhere
I realized that the clutch fork won't really move at all. Do you know what would make it not move? I know it is installed correctly I've had the transmission in and out about 5 times with multiple new clutches and still am having this issue. The linkage is hooked up to the peddle but everything is super loose. Ignore the cut-off exhaust I have a new one going on as soon as I get this resolved the bolts were not coming apart.
Your not going to be able to move it by hand like that .The linkage has slack because its not against the fork and needs the bracket your referring to and installed once sourced. Then with the pedal you have the factor of mechanical advantage to help push with your leg.
X2 on I am also pretty sure you should not be able to move that clutch fork, by hand. I would hook it all back up as normally and see if you can depress it with regular leg pressure.
I Hooked it up to a come along and the rear axle and still wasn't able to move it. The fork was going to bend before it moved. I had it hooked up and the peddle would move if you pushed hard but would just bend everything
I don't have that bracket that goes from the engine side to the Z bar. Is there a kit to buy all the bushings from the peddle to the clutch fork? Mine are pretty loose. And is that bracket the same as the 302 and 360? I have the 351M
Looks like this? For sure right clutch? The 400 uses a 12" clutch and the 351m uses a 11" D7TZ-6375-D.. 400 Flywheel-Use with 12" clutch. D7TZ-6375-E.. 351M Flywheel-Use with 11" clutch.
It takes several hundred pounds of pressure to release the pressure plate so that means nothing. but if it truly won't move with any amount of pressure obviously something is wrong.
Since this is a conversion and your parts inventory is incomplete and possibly incorrect. anything no matter how insignificant is on the table. but you really need to get the linkage hooked up and working before you can really find other problems.
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