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np435 hard to shift warm

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Old May 1, 2011 | 02:20 PM
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np435 hard to shift warm

I have an np435 in my 79 f250. Once i have been driving around for a bit it becomes very hard to shift. There is no problem at all when the tranny is cold. The clutch was recently replaced and this has been a problem both before and after replacement. I am running redline mt90 in it. I would think bad synchros would have the opposite problem, being hard to shift cold. Anyone have an idea what the problem could be?

thanks!
 
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Old May 1, 2011 | 02:58 PM
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What kind of clutch do you have--linkage or hydraulic?
 
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Old May 1, 2011 | 04:39 PM
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The clutch is linkage. I have tried adjusting the rod and it hasnt made much difference.
 
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Old May 2, 2011 | 12:01 AM
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Shot my theory.

But try inspecting engine mounts, and all linkage and linkage pivots and mounting spots.
 
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Old May 2, 2011 | 06:41 AM
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bad pilot bearing or clutch plate hub binding on trans input shaft or bad pressure plate springs or bad pressure plate fingers.
 
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