Question about 1989 Mitsubishi Sigma

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Transmission doesn't stay in one gear

I have a 92 sigma 3000V, some months ago, around town, 50khph, with the OD on, the transmission started to cylce through the gears and not stay in one gear, paritcularly on a long streach of road. The problem wouldn't occur if the OD button was off. So, I just did a change of the tranmission fluid, the old stuff looked good, clearsih red colour but there was no real effect on the shifting of gears. Then two other problems started happening. Occasionaly, when stationary, shifting to D, the car stalls, or when driving for a while, the transmission shifts into neutral, the selector doesn't, but there is no drive to the wheels and the engine revs and revs.

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Possible faults - *check the shifting cable selector is aligned with the neutral starting switch * check engine mounts *make sure the fluid level is between the marks on the dipstick running hot * overdrive friction and drive plates have worn out * the torque converter or oil pump has a problem *do a torque converter stall test hope you used only mitsubishi automatic oil when changed *check the throttle position sensor * temp sensor for the auto the TCU has faults or needs to be replaced

Posted on May 14, 2008

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