I have a 1990 240sx that will not up shift to drive or overdrive it will run the rpm's thru the roof like the clutch is slipping but it is an automatic. Is this a major or a simple fix. Please Help! thanks

 

have you checked the automatic transmission fluid level?

 

all fluid levels are good. I even added some Trans-X . It has slowly gotten worse. It seems to run great other than not shifting up. My son drives it in town to school and back, about 3 miles round trip total, and just shifts manualy between Lo1 and Lo2.

 

On a car that is 17 years old, it might just be time for an A/T overhaul. If you can't handle it yourself, you should go get some quotes, but it wont be cheap, hopefully its something stupid that can easily be fixed, good luck.

 

for the price of an overhaul you could most likely find a used ka tranny. Why not go 5-speed in the process?