Question about 1990 Nissan 240SX

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My 240sx for some reason when i take off it acts like the tranny is slipping but it doesnt always do it just most of the time and im wondering what would cause it?

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  • d_domingo199 May 07, 2010

    okay ill give it a try. you think you could give me some advice on what to do with my 1992 eclipse gsx?



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I would have the transmission fluid and filter changed. Make sure that the shop loosens the valvebody bolts to allow the converter and valvebody to drain, This will expel an extra 2-3 quarts of fluid from the transmission. MAKE SURE THEY ONLY USE ATF+4!!! Very IMPORTANT. Retorque the valvebody to 18 in/lbs and adjust the front and rear bands as specified in the service manual. Also have them check the throttle valve cable adjustment as this is a MAJOR cause of slippage and transmission failure if not adjusted properly. good luck

Posted on May 07, 2010



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92 240sx automatic transmission shifting problems

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Aug 23, 2008 | 1992 Nissan 240SX Fastback

1 Answer

92 nissan 240sx

Hi Kathie!

It sounds like you probably have a cracked or disconnected vacuum line going from the engine (intake manifold area) to the transmission modulator valve. This is the only vacuum line that goes to the transmission, so if you can locate it under the vehicle at the tranny, you can trace it back to where it connects to the engine, and also check to make sure it is not leaking or disconnected. If it is bad, you will need to replace it.

If that is not the problem, then the modulator valve itself has probably gone bad and will need to be replaced, but that is an unusual failure.

Kathy, sorry for your troubles, hope this helps you get it straightened out, but if you still have questions or comments, do not hesitate to let us know! And please remember to rate my advice - your rating is my ONLY compensation for providing this assistance!


Jul 13, 2008 | 1992 Nissan 240SX Fastback

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