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ZF 6 Speed stuck in 1st.

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Old 01-13-2012, 01:00 PM
Journeymaaann Journeymaaann is offline
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Smile ZF 6 Speed stuck in 1st.

While driving home my transmission would not shift out of 1st gear. The clutch seems to operate normally when I come to a stop. Brake master & Clutch reservoirs are full. With motor off shifter seems to go into low or reverse but when started with shifter in that position the truck will stall if I let the clutch pedal all the way up. The shifter when left alone goes to the center of the pattern which should be neutral but when the clutch engages, it is in 1st. There doesn't appear to be any fluid leaks & the truck has 115K.
What do you think?

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Old 01-13-2012, 01:33 PM
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I am no expert but I would say something has let loose ! There are a lot of parts that could fail and gum up the works!! Think yer gonna have to take it to the shop!!

Smokie
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Old 01-13-2012, 01:37 PM
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never herd of this but did you remove the boot inside the cab on the shifter and give a look see. Im pretty sure you can remove where the shifter goes into the tranny from inside the truck and have a look see also
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Old 01-13-2012, 02:27 PM
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I have a zf6 and while it is true that you can in fact remove the shifter boot from inside the cab, I dont think it's gonna give you any help in determining what your problem is.
There is a shifter lever cover on top of the tranny which you'll see with the boot removed, but I cant tell you what you'll see if you remove as I had no reason to remove it while replacing my clutch. Maybe someone else can chime in and let us know if there is any serviceable parts there.
Please keep us informed on your discoveries as I for one have 201,000 miles on mine and like to keep up on possible problems! Bill
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Old 01-13-2012, 02:40 PM
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Have you checked the tranny fluid level? When is the last time you changed fluid? I would at least check the fluid level. My 6sp. started getting a little stiff in first gear once and I change fluid and it helped.
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Old 01-13-2012, 03:15 PM
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Sounds like a sheared roll pin in the shifter assy.
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Old 01-13-2012, 03:36 PM
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Forgive me if I am way out in left field on this but it sounds like when you put it in low or reverse the truck is actually in 2 gears. Try going into first since that is the gear it is hung in and then straight down into N and see if that works. Our old dodge use to be bad about not coming out of 5th but the shifter would be in N and that is how we fixed it. If you jumped the sift opening all together the only way to fix it is pull the stick and use a short bar and pull it out of 1st back into N, put the stick back in and away you go. Good luck.
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Old 01-13-2012, 05:47 PM
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Quote:
Originally Posted by Fat Diesel View Post
Sounds like a sheared roll pin in the shifter assy.
sounds about right to me

that would make it do what levi said. stuck in two gears at once

Barney
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Old 01-13-2012, 06:49 PM
Journeymaaann Journeymaaann is offline
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Thanks for your replies, I have read the thread about the roll pin in the shifter assembly. I got the boot off but didn't get the top of the transmission off yet. I'll take a look at that tomorrow & let you know. Thanks again.
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