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Discussion Starter · #1 ·
First of all, I have a 99' 4R70W Mustang.

I just J modded my valve body and the car will NOT shift into anything but drive.

When I shift it to reverse or neutral the car goes into drive. Also, it will not shift into 1 or 2 at all.

I did the mild J-mod. I just drilled the sperator plate. I did not touch the 1-2 accumulator or 2-3 accumulator.

The O/D light is blinking on and off also.
 

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I'm no trans expert, but you must make sure you reconnected all the solenoids inside the trans. That's probably why the O/D light is blinking. Also, when you put the valve body back on you had to make sure to position the manual control valve in the right spot. I'll stop here and let someone else more knowledgeable chime in.
 
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