Hello from France again.
So , I have a minor problem on my Regal Limited V6 1992.

When i want to stop and go away , my gearbox have some difficulties to select the 1st speed . I must accelerate and after few seconds , the 1st speed transmission run and after all is ok for the second speed and more.
The problem is only when i want to "retrograde"=>"change for a small speed transmission..." .
A friend told me i must to disconnect a cable on the front of the gearbox , that's all. ( A white connector i think !! ).
Does anyone could explain me if this diagnostic is good ? and why only to disconnect a sensor can repair the troubleshooting ???
I don't unterstand this reason.
I 'm a not a master of mechanic , but i know the electrical system and automation systems. So , i would like to understand why my friend said me to disconnect this connector. He don't know why , but he ever know this problem on many automatik gearbox like Firebird......

So , have a good day in USA.

Thanks for your information and time
BRUNO