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Old 07-11-2004, 07:44 AM
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75 GMC 3/4 ton pickup clutch

I just finished replacing the rear differential on my 75 GMC 3/4 ton 4wd truck. Took it out for a test drive and had to return home with a lot of clanging going on. My clutch went down to the floor and stayed there. I would like to replace it myself due to just spending money on the rear. Can anyone tell me how. Tips on pulling the transmissin. I have done lots of work on this truck but am unfamiliar with the clutch. Is there a trick to pulling the transmission to get to the clutch, after this is done where do I go from there.

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Old 07-11-2004, 10:13 AM
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Well ill take a shot at this, usually what's goin on when you press down on the clutch peddle, a rod is attached from the top of your peddle down to a Z-BAR witch attaches to an adjusting rod and it attaches to the fork and a spring hold's them together you might wonna see if your spring fell off if you have a mechanical set up.
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Old 07-11-2004, 02:22 PM
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Originally posted by bowtieorbust
if you have a mechanical set up.
Unless someone went through the trouble of replacing the clutch set-up you HAVE the mechanical with all the parts that can and will wear out.

Check for anything that looks like it has too much play in it, every connecting point of the rods, z-bar, the clutch fork, EVERYTHING.

If everything looks fine and has little play from minimal wear, then I would have to say you are going to have to remove the transmission as the main culprits of clutch loss in there are the clucth fork wearing and sliding over the throwout bearing, or the throwout bearing itsself.

And as long as you are in there visually check everything else if you feel the need to.
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