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Tranny jumps out of O/D for no reason

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  #1  
Old 11-25-2007 | 12:32 PM
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Default Tranny jumps out of O/D for no reason

hey guys i was on my way home and my tranny just jumped out of O/D and i am tryin to figure out why.
I know that the button in the dashis not that good push to hard and it willpush into the dash (it works but itsbroke) any sugestions or tips thanks in advance its a 94 1500 V6 auto
 
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Old 11-25-2007 | 12:35 PM
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Default RE: Tranny jumps out of O/D for no reason

fisrt off, repair/ replace the o/d button and location.

then look for loose grounds on the chasis, block, and trans.

the button may be worn, the wires could be slightly shorting.

were ya in cruise at the time??

could be the tps, or any number of sensors.
 
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Old 11-25-2007 | 12:39 PM
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Default RE: Tranny jumps out of O/D for no reason

it does not have cruise just a base model
 
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Old 11-25-2007 | 05:38 PM
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Default RE: Tranny jumps out of O/D for no reason

did it pop into 3rd? or just unlocked the torque converter?

 
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Old 11-26-2007 | 06:51 PM
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Default RE: Tranny jumps out of O/D for no reason

ORIGINAL: XXL 1500

did it pop into 3rd? or just unlocked the torque converter?

you know that O/D button the light came on it that and it just dropped down a gear

i am goin to get another O/D button cause mine is broke push to hard and it goes into the dash

thanks for the help so far guys
 
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Old 11-27-2007 | 06:45 PM
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Default RE: Tranny jumps out of O/D for no reason

any one ???
 
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Old 11-28-2007 | 06:44 AM
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Default RE: Tranny jumps out of O/D for no reason

I agree that cleaning the electrical grounds
especially any that have that 'green crud'
that electricians have given the name 'green death' to,
may help if the problem continues after the button has been changed.

When the O/D button is pushed
the PCM computer closes an internal swithch which
completes a ground circuit to the o/d solenoid in the trans.

 
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Old 11-28-2007 | 05:31 PM
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Default RE: Tranny jumps out of O/D for no reason

ORIGINAL: HankL

I agree that cleaning the electrical grounds
especially any that have that 'green crud'
that electricians have given the name 'green death' to,
may help if the problem continues after the button has been changed.

When the O/D button is pushed
the PCM computer closes an internal swithch which
completes a ground circuit to the o/d solenoid in the trans.

for starters i did change the button and threw the old one out
HankL these grounds you speak of do you know where they are? then i can look at them and
clean them if need be what would ya recomend to put on the grounds after they have been cleaned
 
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Old 11-29-2007 | 02:18 AM
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Default RE: Tranny jumps out of O/D for no reason

any where a wire is screwed to the body, chassies, or frame is a ground, sart by the trans, pcm and work your way out from there...as for what to put on them, get some dielectric grease and smeer it over top of the ground
 
  #10  
Old 11-29-2007 | 06:54 AM
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Default RE: Tranny jumps out of O/D for no reason

Look near the PCM computer
and there should be at least two grounds nearby
and those two are perhaps the most important.

Trace the black ground wire from the battery negative terminal to where it is bolted
and clean that connection at both battery and frame ends too.

Let's hope it is not a bad solenoid inside the trans.


 



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