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1994.5 - 1997 7.3L Power Stroke Diesel  

Tranny problem

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Old Jan 22, 2008 | 05:37 PM
  #1  
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heathrunkles
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Tranny problem

Hey guys-going down the road today for work(about 30miles into the trip) the tranny jumpes out of OD into 3 but when I stepped on the pedal the rpms shot up but not the speed, like it was slipping. this was at 70mph- I let of the pedal and it shifted back into OD and was fine for ten miles or so before it did it again. only for 5-10 seconds at a time. Let it sit for two hours or so and it was fine for about 80 miles with weight on it, highway and city. No change in acceleration even when I mash the pedal-still shifts smooth and quick. just wondering if it sounds like the tc or something else. Thanks
 
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Old Jan 22, 2008 | 06:36 PM
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Hit the OD cancle button and see if lamp lights.
Did the OD lamp flash?

Bill
 
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Old Jan 22, 2008 | 07:04 PM
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The second time I did hit the od cancel. When i engaged it againit hesitated and then shifted back to OD. No flashing light
 
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Old Jan 22, 2008 | 07:20 PM
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But does it light up when you cancel it?

Bill
 
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Old Jan 22, 2008 | 07:23 PM
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yes it did light
 
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Old Jan 22, 2008 | 07:44 PM
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CEL?

Bill
 
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Old Jan 22, 2008 | 08:02 PM
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no. It only happened twice but the second time I was watching\feeling for it. But no CEL. I forgot to add that it has a banks transmission controler on it. Been on for 4 months or so. That really tightened up the shift points.
 
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Old Jan 22, 2008 | 08:08 PM
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The banks will raise line pressure. It fools the EPC.
Cannot really say anything about the issue.
I would recheck the command wiring though.
Just be shure the pins are locked into the connectors. Pull on the wire (each pin) to be shure they do not come out of the plastic housing.

And check all the brake lights. Just to be shure they work and they are not to sensitive to go on.

Bill
 

Last edited by MADVAN; Jan 22, 2008 at 08:15 PM.
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Old Jan 22, 2008 | 08:10 PM
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the transcommands I have seen have not been sealed well and actually crumbled in my hand!
 
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Old Jan 22, 2008 | 08:22 PM
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Well I will keep driving it and watch it closely. If it does it tommorrow I have a bypass jumper for the transcommander. I will try that for now and see what happens.
 
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