Gear shifting problem

1999 BUICK REGAL
128 MILES
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MATTAUTO
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I have a 1999 Buick regal, 3.8 non supercharged. it stopped shifting in all gears, so I went to pull and pay bought a trans swapped it with my old one and it is still doing the same thing. so I replaced computer from pull and pay all the numbers were same I have replaced transmission with a used one, and still no shifting so I tried replacing computer and the replacement the car wont start so i don't have a proper scanner to reprogram so I need help to figure this out. I would say trans again but to get one and the exact same thing makes me think computer so that's why I replaced but i think it needs reprogramming I just need my car fixed.
May 20, 2012 at 5:09 PM
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ASEMASTER6371
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put the old computer back in. before jumping to any conclusions, let a shop look at it to verify that there is communication with the pcm.

check all your fuses. the used trans you have may have had the same issue. thats why it was in the junkyard??

Roy
May 20, 2012 at 6:23 PM