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To anyone installing a DiabloChip or a Superchip, has the power increase and revisions to the CD4E ATX shifting corrected the issue of the O/D light flashing? I've tried virtually everything to correct the O/D light flashing but to no avail trying both the black and white speed sensor, replacing the tranny fluid and adding a tranny cooler. Disconnecting the battery or resetting the check engine and O/D light with a scanner are only temporary fixes. The O/D flashing occurs going up an incline in overdrive with a load on the engine and before the ATX has down-shifted to third gear. Sometimes, the O/D light flashes alone and at other times the check engine light also comes on. When the check engine light does come on the only error is P1744 "Torque Converter Clutch System Stuck in Off Position" which I believe means that the ATX has reverted to (harsh) hydraulic shifting, which it appears to do until reset.
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I'd check the wiring in the handle shift area to see if the wire leads for the od switch are caught in the shifter handle and shorting out. I had a similar problem and it turned out to be this.
Regards,
bt
An ounce of prevention provides a pound of cure!
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This code means that your TC is not locking back when it should.
Installing a chip will not correct this. Actually, you should not install a chip like the ones above unless you know that everything is all good first.
You have a problem in one of the three...
Solenoid Block - There is a solenoid located on this block, which is located on the valve body. This solenoid controls a piston in the valve body. You cannot change just the solenoid, but you have to change the whole block of solenoids.
Valve Body - The piston I mentioned above could be sticking when pressure is applied to it and not able to return, which would allow the TC to lock back again. You would have to pull the VB and SLB from the car and have the valve body rebuildt. Use Sonnax valves and pistons, also get a Trans Go CD4E Shift Improvment kit. That will solve a ton of problems.
Electrical/PCM - Check the connecter on to of the CD4E
Phillip Jackson
`98 Mystique LS
262K+ and counting...
ATX rebuilt @ 151K
"This storm has broken me, my only friend!" RIP Dime
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Receipts from the dealer from the first time, a year ago, the O/D light flashing occured state that the main electronic transmission cover was accessed and the solenoid valve body ($83 for the part) was replaced. Then the dealer handed it back to me without the O/D light flashing. The car is now out of warranty but only has 30,000 miles on it.
The difficulty I have is that I live in Ohio which is very flat and the only place around that I can get it to flash is about 35 miles away. When I drive it to New York to visit my son is when the O/D light flashes quite easily. Therefore, here, even if the dealer/tranny repair shop thinks it has it fixed, they probably won't drive 35 miles away to test it. They take it for a local drive, just hand it back to me and say it is OK.
Hopefully, the above covered the solenoid assembly, leaving only the valve body as a possible problem.
Could it not be the computer program that is a problem since this O/D light flashing is such a common problem with Contours/Probes/Mazda 626's, all with the CD4E ATX? That is why I was asking about the chip addition.
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No itā??s not the chip, and itā??s not the solenoid. Code 1744 is just what you said. TC clutch mechanically stuck in the off position. This means that the PCM is detecting a speed difference between the engine and transmission when ā??lock upā? has been ordered. This condition causes the ATF inside the TC to heat to unsafe temperatures because the lock up clutch is dragging (like ridding a clutch with a manual). The PCM will order a ā??safe homeā? condition that will cause rough (bang) shifting and sometimes the CEL. The only cure is to replace the TC and install a Valve Body (or rebuild yours) that has been rebuilt with new valves and modified to prevent this problem. If you continue to drive the car, the ATF will overheat and fry the rest of the tranny.
This is what Iā??m doing to mine right now.
jeff
have you fixed your ford lately?
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Originally posted by mercman:
No itā??s not the chip, and itā??s not the solenoid. Code 1744 is just what you said. TC clutch mechanically stuck in the off position. This means that the PCM is detecting a speed difference between the engine and transmission when ā??lock upā? has been ordered. This condition causes the ATF inside the TC to heat to unsafe temperatures because the lock up clutch is dragging (like ridding a clutch with a manual). The PCM will order a ā??safe homeā? condition that will cause rough (bang) shifting and sometimes the CEL. The only cure is to replace the TC and install a Valve Body (or rebuild yours) that has been rebuilt with new valves and modified to prevent this problem. If you continue to drive the car, the ATF will overheat and fry the rest of the tranny.
This is what Iā??m doing to mine right now.
jeff
Ya know what!? I am glad to know that I am not the only one around here that as some serious experience with the CD4E! That is not to say that Roadrunner is slacking... I am just glad that someone around here is making more since then me!!! Thanks mercman!!!
Phillip Jackson
`98 Mystique LS
262K+ and counting...
ATX rebuilt @ 151K
"This storm has broken me, my only friend!" RIP Dime
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Originally posted by unisys12:
Originally posted by mercman:
No itā??s not the chip, and itā??s not the solenoid. Code 1744 is just what you said. TC clutch mechanically stuck in the off position. This means that the PCM is detecting a speed difference between the engine and transmission when ā??lock upā? has been ordered. This condition causes the ATF inside the TC to heat to unsafe temperatures because the lock up clutch is dragging (like ridding a clutch with a manual). The PCM will order a ā??safe homeā? condition that will cause rough (bang) shifting and sometimes the CEL. The only cure is to replace the TC and install a Valve Body (or rebuild yours) that has been rebuilt with new valves and modified to prevent this problem. If you continue to drive the car, the ATF will overheat and fry the rest of the tranny.
This is what Iā??m doing to mine right now.
jeff
Ya know what!? I am glad to know that I am not the only one around here that as some serious experience with the CD4E! That is not to say that Roadrunner is slacking... I am just glad that someone around here is making more since then me!!! Thanks mercman!!!
My tranny still sucks, but for now its driveable... im broke, so I cant be flashing my cash at mechanics to check it out. 
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Thanks for the reply! Is the torque convertor and valve body some things that I can repair/replace, myself? In or out from under the hood? If not, any guess on what it would cost to have it done professionally? Since this only happens occasionally, what if I left it alone and each time clicked off the the flashing O/D light and check engine light ASAP with my portable scanner? If it would eventually fry the rest of the tranny, would it really be that much more to replace the whole thing?
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I paid $275 for an updated/rebuilt Valve body and $99 for the TC. I replaced the VB with the engine and tranny still in the car. It wasnā??t to hard but you really need a Ā¼ inch air ratchet. The new VB restored my internal pressures but the TC damage was already done. I pulled the motor Saturday, installed the new TC and dropped the motor back in. I took Sunday off, and I am just about finished.
The thing that is holding me up is I can't figure how to get the Rad-fans back in?????
Anyhow, if you have pulled motors before itā??s not too bad. But I donā??t recommend it if you are not a hardcore motor head with air tools and a hoist.
jeff
have you fixed your ford lately?
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ya know what, same thing happens to my car TOO.
after driving at a reasonable pace on the highway (about 80-90mph) it comes on and won't shut off. came back from oklahoma, and a freind of mine drove it (while i was sleeping, didn't bother to wake me up) all the way through missouri with the od off light flashing. now it does it all the time, and the codes came up on a snap on scanner as "transmission overheat" and "torque converter lockup failure", not to mention my engine problems: "OBDII system checks incomplete" but driving it how it says in manual doesn't help, and "lean mixure, bank 1", probly one of the oxygen sensors.
but yes, i feel your pain........ i'm not liking the cd4e's
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