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C-4 doesn't shift.....

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Old Aug 9, 2004 | 05:44 PM
  #1  
Syntheglass's Avatar
Syntheglass
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From: Virginia Beach
C-4 doesn't shift.....

Okay here's the problem, I put in drive and it shifts into 1st but it will not shift into second. I can manually shift it into second, but if I shift it back to drive it stays in second. So basically I don't have a 1-2 shift or a 2-3 shift. I am not a tranny guy. I know that my downshift linkage has never been hooked up, hasn't seemed to matter. Now I had this tranny rebuilt about 4,000 miles ago and I am not rough on it at all. Is there anything to do? Pics would be very helpful, any advice would do....thanks in advance.
 
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Old Aug 10, 2004 | 09:38 AM
  #2  
Jimbare's Avatar
Jimbare
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Joined: Feb 2002
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From: oklahoma
sounds like the modulator valve is out. replace that and see what happens. be sure and get the adjustable valve, it comes with a new actuator rod and instructions on how to adjust it.



jim
 
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Old Aug 10, 2004 | 09:50 AM
  #3  
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fellro86
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From: Marengo, Iowa
I agree with jimbare, it sure sounds that way. It's the round piece that the vacuum line from the manifold runs to.
 
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Old Aug 10, 2004 | 11:42 AM
  #4  
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Jag Red 54
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From: Valley Center, CA
Before you replace the modulator valve, is that vacuum line hooked up and working? John
 
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Old Aug 11, 2004 | 08:22 PM
  #5  
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Syntheglass
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From: Virginia Beach
All on the right track but I'll have to give it to Jag, wasn't even hooked up....thanks for the posts. Hey, do you have a 54 Jag? Thanks again guys.
 
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