Question about 1993 Nissan Quest

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1993 Nissan Quest transmission abrupt shifting/ bucking

Transmission works perfectly, without problem 90 percent of the time. However, the other times it wants to buck like it's changing gears or locking. If you turn the AC off, it will not act up at all. Turn the AC system on, and it's back to the problem.
Nissan parts says a computer that costs 700 dollars or so is the likely problem. I think I found a used one at the junk yard but I don't know for sure what it looks like and exactly where it's placed. Can you advise your thoughts. Thanks for any help you can provide.

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First thing i would try is unplugging your battery for 15 minutes, sometimes the tcm will record your driving conditions, say someone drives really fast it realizes this and shifts faster to accomidate the intense driving conditions, by doing this it should reset the computer, this is the cheapest fix i would try first, otherwise those guys may be correct. give the cheap simple path a shot first though, take care and good luck.

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Posted on Dec 11, 2008


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Posted on Jan 02, 2017


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