Intermittent Downshifting Problem?

[ashleywat]

Hey guys, 94J30 is downshifting sporadically. Took it too a tranny shop and they said it does not to be a transmission problem, they believe it to be a sensor shorting out here or there. Anyone had this problem, any suggestions would be greatly appreciated. Thx

[Speedy_1234]

Well I found out something that might be wierd but true do you know that the car 94 has a computer right right but not does it have one but 2 one for the motor and other for tranny the motor is found in the part that the passanger sit and puts it feet it there on the right side but if you go to the driver side and look same but on the left side you see other computer which that one is for the tranny and i was asking what that was for and they told me that is for the tranny and welll mabye the proble is not the tranny but the computer check and see if not broken or has water go to it

[ashleywat]

Thanks for the reply, but I do not understand what you are trying to say.

[carlos_knology]

He's trying to say that there is the main computer ECU and a tranny computer (TCU). There are also several transmission sensors that feed data to the TCU.

The best thing may be to take it to a dealer and have them hook it up to a Nissan Consult machine to see if the TCU has any fault codes stored.

The average transmission shop can't afford to own the Nissan-specific Consult machine.

Carlos

[Speedy_1234]

Yo Thanks carlos for helping out with the right words take care bro.

[ashleywat]

hey guys sorry for just replying now, been away from the forum for a while. The tranny shop I took the car too had the machine to test it on, but never could reproduce when it was hooked up, and they logged over 70 miles on it over 4 or 5 days.