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Old Aug 1, 2010 | 07:50 PM
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Default converter wont unlock

i have a 93 t/a and the torque converter wont unlock. I was wondering if anyone had any ideas what could be the cause.


Thank you
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Old Aug 3, 2010 | 12:33 PM
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hung lock up valve in the pump? bad solenoid? bad converter?

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Old Aug 6, 2010 | 08:58 PM
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I was going with the cheapest fix first, so i already replaced the TCC solonoid and thats not it, so it looks like i'm going to be disassembling my pump next.
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Old Aug 7, 2010 | 08:47 AM
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When you removed/replaced the lu solenoid, did you push upward on the lu valve (located under the tcc solenoid) to see if it was stuck or moving freely. Its rare, but I have seen the springs break, and a small piece of spring get caught in the valve.
93 is pretty old.... fluid is still in good condition?
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Old Aug 7, 2010 | 02:47 PM
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Just had the same problem but mine ended up being the soleniod. I would rule out electrical problems first. With the transmition unplugged it should work in D (third gear only) and reverse. If the transmition works unplugged then you know you have an electrical problem somewhere.
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Old Aug 10, 2010 | 09:15 PM
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I unplugged it, and sure enough, it is still not working. I will have to take a look at that valve this weekend and see if its stuck. I appreciate the tips.

thanks
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