Chrysler Repair: 1993 New yorker/fith ave Tansmission trouble, chrysler new yorker, chrysler dealer

Question
I have a 1993 Chrysler New Yorker-Fifth ave. 3.8 V-6 with 86,000 miles Car set with very limited driveling for about a year. I bought the car changed all fluids including the transmission flied and filter. Have drove for almost a year and now all of a sudden it will not change into high gear. What can I do to start trouble shooting the issue. What is the likely cause. Thanks, Steve

Answer
Hi Steve,
There are many possible reasons for this behavior, so many that it is very worthwhile to take advantage of the self-diagnostic capability of unit.I would suggest that you get a readout of transmission controller's memory to see what fault code has been noted and stored as a two digit number. The refusal to shift out of second gear is called "limp in mode" and it means that a fault that threatens to harm the trans has been seen. The controller puts it into this mode state and also logs the code into its memory. That readout is accessible thru a special 6-pin plug behind a door at the lower left-hand end of the dash called the bus diagnostic connector. This is not the same as the connector under the hood that accesses only the engine controller memory. The reader that is used has to have that plug and be capable of reading out the code from a Chrysler transmission; one such reader is the Chrysler Diagnostic Readout Box II, or DRB II and would be found at a Chrysler dealer. When you get the readout ask: what is the code number(s), what do they mean, what do they recommend doing, and at what cost. Then write me back with the results for advice before buying into any major repair.
Roland
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Hi Steve,
Thanks for the response/evaluation/nomination. I should also mention that you don't necessarily have to go to a Chrysler dealer for the readout. A local independent shop should have a reader too, but ask to be sure. I would avoid a nationwide franchise sort of shop because they are geared to putting in rebuilt transmissions as the first priority. You may even be successful if they give you a price estimate in giving you 'credit' for the cost of the readout in the event that you choose them to do the repair. Be sure to get the code number(s).