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C6? transmission problems

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  #31  
Old 05-26-2013, 02:25 AM
warrengg250 warrengg250 is offline
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imtrying to remove the tail sction on a c6 transmission out f a car and put the short section off my truck on
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Old 05-26-2013, 02:30 AM
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i have a c6 from acar iput in my truck hw do swap tailsecton frolng to short
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  #33  
Old 05-26-2013, 09:08 AM
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What?

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  #34  
Old 05-27-2013, 08:49 PM
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Ok I think I figured out what you are saying, you want to convert a long shaft c6 to a short shaft c6. To remove the tailshaft I think just about the entire trans has to come apart. And make double sure your bellhousings match. If you have a diesel sell that car trans and rebuild yours.
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  #35  
Old 01-10-2014, 06:27 AM
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im having this same deal with my truck, rpm gets real high and then shift's really hard. has been like that sence i bought the truck. it also down shifts way to soon.. any advice?? thanks...
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  #36  
Old 01-10-2014, 10:40 PM
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Remove your kickdown rod (with the vrv it isn't needed mines been off for 3 years) and tip the vrv on the side of the injection pump a little at a time until you are satisfied. The VRV should need to tilt towards the front of the truck.
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Keep our planet clean, when you fuel up please use the green handle.
84 F-250 6.9 with a boost from Hypermax.
87 F-150 5.0 The winter truck
68 F-250 CamperSpecial 390ci/NP435 Getting a Diesel!
75 9600 Tractor 401ci Blowin smoke in 300 ft bursts
Tom
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  #37  
Old 07-19-2014, 10:18 AM
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Have 85 f250 4wd 6.9,putt 4'' lift on it other day now trans,shudders when taking off and feels like im pulling heavy load trans was rebuilt maybe 5000 miles ago,fluid looks good,has always shifted hard, thoughts?
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  #38  
Old 09-02-2014, 08:04 PM
Howard57 Howard57 is offline
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Mine is '83 F250 6.9. I too have developed the shift into/outof 3rd at 45mph problem.
After reading the first page of this I checked and found:
My pump is maintaining 20+ Hg.
The top port of the VRV holds 0 Hg. So I guess it's hosed.

I have broken one of the VRV adjustment clamping screws and can't get the other to budge. Steel screw in white metal and apparently no anti-seize. Have PB Blaster-ed it a few times over the last few of months. I guess I could go ahead and put some heat on it to break the screw loose and not worry abut melting the VRV if I am going to replace it anyhow,
Is there other plastic that could be damaged back in there?

Also - I had an idea and just connected the vacuum supply to the trans modulator line and I get good shifting!
Why does this work?
Will the 20 Hg ruin the modulator?
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