Question about 2000 Jeep Grand Cherokee

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My 1996 ford thunderbird is getting a po720 error code, it says its a speed circuit malfunction. the spedomitor stopped working, and the overdrive light flashes. when i drive it, the car fails to shift gears. we tested the transmission and the transmission is good, ive replaced the computer, and the speed sensor module. does anyone have any idea what the problem might be? if it helps my cars a 4.6 liter with a v8. thanks!

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The transmission needs tobe replaced. the problem you have is in the tranny. one or more of the selonoids in it is malfunctioning.

Posted on Apr 15, 2009

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