Re: O/D Off...WHAT???
[Re: moretoys]
#1274631
07/26/12 10:38 PM
07/26/12 10:38 PM
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Joined: Sep 2005
Posts: 12,481
Chino Valley
RodStRace
I Live Here
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I Live Here
Joined: Sep 2005
Posts: 12,481
Chino Valley
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My ram diesel does this at times. In my case, it's a loose connection at the ATF temp sensor. As soon as the PCM sees an open circuit, it kicks off the OD and L-U torque converter to protect the trans. Pull codes to see if you have something that kicked a code. 
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Re: O/D Off...WHAT???
[Re: RodStRace]
#1274632
07/26/12 11:10 PM
07/26/12 11:10 PM
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Joined: May 2003
Posts: 3,042
N.W. Florida
Fat_Mike
OP
master
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OP
master
Joined: May 2003
Posts: 3,042
N.W. Florida
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Quote:
My ram diesel does this at times.
In my case, it's a loose connection at the ATF temp sensor. As soon as the PCM sees an open circuit, it kicks off the OD and L-U torque converter to protect the trans.
Pull codes to see if you have something that kicked a code.
Thank you for the responses. RodStRace, I think you're on to something. I just went out and fired it up after sitting for awhile (2+ hours), and the O/D on/off button works as designed. So now I'm wondering why this happened. Is my transmission getting hot? Might it be fixed with something as simple as changing the fluid and filter, or is the problem likely deeper than that? Anyone want to ponder a guess???
The only code I have is P0601. I know that I should get this looked into as well, but...well, I haven't.
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Re: O/D Off...WHAT???
[Re: Fat_Mike]
#1274633
07/26/12 11:23 PM
07/26/12 11:23 PM
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Joined: Mar 2003
Posts: 1,728
ST clair shores MI
moretoys
top fuel
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top fuel
Joined: Mar 2003
Posts: 1,728
ST clair shores MI
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If the trans temp was too high. I'm pretty sure that there is a trans temp light in the cluster.trans fluid change will not fix a problem.It might need it,don't expect it to be a cure all. make sure you use the correct fluid. atf+4. is fluid full ? check the grounds on the left front of block/ cylinder head. p0601 isn't that something to do with pcm??? maybe trans went into limp in mode.
Last edited by moretoys; 07/26/12 11:27 PM.
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Re: O/D Off...WHAT???
[Re: moretoys]
#1274634
07/27/12 12:04 AM
07/27/12 12:04 AM
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Joined: May 2003
Posts: 3,042
N.W. Florida
Fat_Mike
OP
master
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OP
master
Joined: May 2003
Posts: 3,042
N.W. Florida
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Quote:
If the trans temp was too high. I'm pretty sure that there is a trans temp light in the cluster.trans fluid change will not fix a problem.It might need it,don't expect it to be a cure all. make sure you use the correct fluid. atf+4. is fluid full ? check the grounds on the left front of block/ cylinder head. p0601 isn't that something to do with pcm??? maybe trans went into limp in mode.
Awe, darn... It seems I've always had one code or another on this old truck, so I tend to ignore them. I just read up on this P0601, and it seems you're right...bad PCM. But now that it's cooled off the overdrive button seems to work as designed. In any case, I reckon I'll have to replace that PCM and see what happens from there. Thanks for sharing your knowledge. With any luck I won't have any follow-up questions.
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Re: O/D Off...WHAT???
[Re: Fat_Mike]
#1274635
07/27/12 12:27 AM
07/27/12 12:27 AM
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Joined: Feb 2006
Posts: 1,949
land of 10,000______'s
BDS871Cuda
top fuel
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top fuel
Joined: Feb 2006
Posts: 1,949
land of 10,000______'s
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My 2001 dodge munched up 2 tranys but it was under
warranty. 31 ft 5th wheel put it to work. Now I
only buy the 5 or 6 speed manual trans. trucks.
Snap your neck, mega G-force launch, is all I want!
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