Question about 2000 Mercury Grand Marquis

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When taking off the transmission won't shift to second until about 35 mph.

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Check for vacuum leak--especially on hose that goes from engine to transmission modulator valve..

Posted on Oct 02, 2010

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Take to a transmission shop, likely you need overhaul or replacement.

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94 nissan pathfinder auto 4x4 shifts into second about 35 mph but wont shift out of second


Hello
The engine and transmission in this cars drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL THE DIAGNOSIS & TESTING IS COMPLETED.

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CAR GOES INTO DRIVE BUT DOES NOT SHIFT OUT. WILL NOT EXCEED 35 MPH


Unscrew the wing nut on your air breather and lift it off. On the driver side of the car, on the side of the throttle body there is a bar/linkage that comes up from the side of the transmission that is supposed to be connected to the throttle body by a small plastic bushing/grommet fastener. As they age, they break off and will cause this delayed shifting. If you drive it hard enough it will eventually shift (35-40 mph) out of first gear. Probably wont shift out of second until closer to 65-70 mph. Same thing happened to me. I thought geeze this thing is not going to shift but it will. Should be a simple fix.

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1994 ford tempo; vehicle upshifts late, won't shift until 35-40 mph after high reving fro 35 mph, then again at 65 mph after high reving from 55 mph to 65 mph.


Sounds like your transmission is on the fritz. Try changing the fluid and filter see if that helps. If that doesnt try a can of anti slip from any good parts place (Napa). If this dosent help it's time for a rebuild on the transmission

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1 Answer

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sounds like a sticking shift solenoid have trans. serviced and check i would recomend factory fluids

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