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  #1  
Old 07-31-2010, 06:20 PM
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ZF6 issue

Tonight I stopped at a light left in 1st gear went to grab second and I had to pull real hard to get it out of first and get into 2nd.. I stopped and tried to grab first and it was hard like jam it into 1st hard then 2nd I have to literally yank it in (thinking the shifter is gonna snap)LOL.. all the other gears are smooth and shift with no effort.. I have tried it stopped with the clutch in engine running and I have tried it with engine off.. its not the clutch it is working properly..

I had it in for the 6h gear syncro about 6 months ago it isnt acting like a syncro, when my syncro went it would click and grind into gear but with the truck off it shifted fine ..

this one has me stumped
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Old 08-01-2010, 07:35 AM
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bumpin it up .. anyone know what could cause the 1st and 2nd shift to be so tight ya almost need 2 hands to put it into those 2 gears ??

looks like Ill be pullin it out tuesday or wednesday
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Old 08-13-2010, 07:16 PM
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fixed and up and running again another screwed up syncro... full rebuilt done this time.. pockets are a little lighter but its fixed

I figured I would post up incase someone else has the same issue seeing as I was flooded with others thoughts and sugestions as to what it could be.. help around here seems to have died, its a shame
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Old 08-13-2010, 07:23 PM
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Mine did that a few times over the winter, it wouldn't go into second like normal. Figured it was just the cold...at least thats what I kept telling myself so I wouldn't think of what it actually was...

Its fine now though. Good to know what it might be if it does it again.
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Old 08-13-2010, 07:25 PM
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my syncros for 2nd in my truck were gone too i just learned to not use 2nd lol
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Old 08-13-2010, 07:28 PM
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I pull a trailer all the time I need 1st and 2nd ...lol its to big of a gap from the creeper gear to 3rd..lol I drove it home like that rev to 2800 in creeper then go right into 3rd since first and second were screwed the motor lugged but got me home
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Old 08-13-2010, 07:30 PM
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Yeah, I pull a trailer 3-4 times a week, 1st and 2nd are a must, and on some hills, low is an absolute must.

Are syncros on these things hard to change? What about the clutch? I'll be looking at a southbend clutch before the end of next year I'm guessing.
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Old 08-13-2010, 07:32 PM
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i had a SBC in my early 99 that thing took a ton of abuse i was hard on that truck
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Old 08-13-2010, 07:35 PM
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Yeah, I'm hard on this truck too. Its what makes me love it so much. haha. Its never hesitated pulling anything, going anywhere, or hauling whatever. It never ceases to amaze me that it'll do whatever I ask of it. Its like its trying to impress everyone.

That being said, it does see more than its share of abuse, so I know the clutch will need to be replaced sooner over later.
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Old 08-13-2010, 07:41 PM
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I have the sbc in my truck I love it works great

as far as the syncro the whole thing needs to be tore down so I pulled it out sent it in to a rebuild shop to have it done then I put it back in .. all new syncros, new bearings and a collar that was broken and the updated syncro where they had to machine something internally cost me $2000 .. it has never shifted this nice, and it use to shift real good I though
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