>> I have a 94 LC 4.5L (180,000 miles) with automatic transmission. I
>> bought the LC about 3 months ago and it was previously a one-owner
>> vehicle and fairly well maintained. The engine runs excellent, no
>> oil consumption, and the tranmission shifts smoothly with the
>> following exception I will explain.
>>
>> The first problem I just solved by reading the Factory Service Manual.
>> I was a little worried when the LC would not shift into OD until I drove a
>> few miles on the morning. Now know that this is by design and to allow
>> the AT fluid to heat up before shifting into OD (has min temp limit).
>>
>> Secondly, there is a high pitched whining noise, especially
>> noticeable between 1->2 shift, and noticeable to a lesser extent to
>> the point of being unnoticeable at higher speeds and gears (may be
>> the road noise makes it difficult to hear). I have rebuilt the
>> entire front end including pinion bearing and don't believe it to be
>> related to drive train external of the transmission. In fact, once
>> the shift occurs from 1->2 the noise is significantly diminished.
>>
>> I have replaced the transmission fluid twice to flush out any old
>> fluid and now have Mobil 1 synthetic fluid. The filter was removed
>> and cleaned and there is nothing else I know to do to diagnose the
>> problem. The problemis not too bothersome as is, but I
>> want to avoid getting stranded and satisfy my curiosity and remedy
>> the problem. I will take the LC this summer on a long trip up the
>> east cost and don't want to have to diagnose the problem the hard
>> way.
>>
>> If anyone has ideas or has experienced the same problem, I would
>> like to hear from you. I know little to nothing about the workings
>> of automatic transmissions, so any advice is appreciated.
>> bought the LC about 3 months ago and it was previously a one-owner
>> vehicle and fairly well maintained. The engine runs excellent, no
>> oil consumption, and the tranmission shifts smoothly with the
>> following exception I will explain.
>>
>> The first problem I just solved by reading the Factory Service Manual.
>> I was a little worried when the LC would not shift into OD until I drove a
>> few miles on the morning. Now know that this is by design and to allow
>> the AT fluid to heat up before shifting into OD (has min temp limit).
>>
>> Secondly, there is a high pitched whining noise, especially
>> noticeable between 1->2 shift, and noticeable to a lesser extent to
>> the point of being unnoticeable at higher speeds and gears (may be
>> the road noise makes it difficult to hear). I have rebuilt the
>> entire front end including pinion bearing and don't believe it to be
>> related to drive train external of the transmission. In fact, once
>> the shift occurs from 1->2 the noise is significantly diminished.
>>
>> I have replaced the transmission fluid twice to flush out any old
>> fluid and now have Mobil 1 synthetic fluid. The filter was removed
>> and cleaned and there is nothing else I know to do to diagnose the
>> problem. The problemis not too bothersome as is, but I
>> want to avoid getting stranded and satisfy my curiosity and remedy
>> the problem. I will take the LC this summer on a long trip up the
>> east cost and don't want to have to diagnose the problem the hard
>> way.
>>
>> If anyone has ideas or has experienced the same problem, I would
>> like to hear from you. I know little to nothing about the workings
>> of automatic transmissions, so any advice is appreciated.
