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#1
10-28-2005, 12:38 PM
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94 supreme tranny drops from 4th
My 94 Supreme convertible will go into 4th (overdrive?) then after a couple miles will drop back to 3rd and not go back to 4th. I can switch from D to 3rd and back with no difference. Interstate driving at almost 4000 rpms is killing my gas mileage. When 4th is engaged it runs about 2500 rpms. Any ideas?
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#2
10-28-2005, 12:47 PM
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Reading a post further down I found this...
It is possible the tcc solenoid is overloading the pcm quad driver which will kill the circuit to the solenoid and out of o/d. This should be scanned with a trans capable scanner to look at solenoid commands and operation to really diagnose this properly. So that translates to take it to a tranny shop....answered my own question thanks anyways.
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