Locate transmission modulator 95 Buick
How TO REPLACE THE TRANSMSSION: CALL A MECHANIC
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Try to replace the oil filter if the transmission is not engaging when it's cold.
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located right on front and top of transmission. Just below and to the left of the airfilter housing. Just follow the vacuum line from front top of intake, right down to transmission, driver side. Pretty easy to find really. Screw it out, screw new one in. Why do you want to replace the modulator valve? I believe this is a electronic shift transmission
It is located on the rear of the transmission. Should be round and have a vacuum hose attached to the middle of it.
it should be on the side of the transmission with a black rubber tube from the engine leading to it
Sorry but they are not the same
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The 1990 Buick Century has a timing chain and not a belt. No replacement is necessary.
There are four things that control your automatic transmission shifting. First: Speed sensor Second: Throttle Position sensor Third: Automatic Transmission Modulator. Fourth: Viscosity (How good) your transmission fluid is. One of those three are probably bad, first start with replacing the fluid and filter in your transmission (Take to a professional for best results), second,look up voltage specs for the Throttle position sensor, test it (It's on your intake ductwork) If it's not within spec, you'll have to adjust it. If it's fine, replace your speed sensor (Easier than the modulator, and it can still register correct speed and send off a bad signal to PCM, causing incorrect shifting) and lastly, replace the modulator. That should fix your problem
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Inside the transmission. Pan on bottom of transmission must be removed to access the filter.
If the 1990 Buick Century transmission is only shifting well when it is cold, you have to rebuild this transmission. It is likely that the clutch packs or clutches in the transmission are damaged or worn.?æ
where is the fuel fiter located on a 1989 buick century wagon 2.5l 4cyl, and how do i go about replacing it.
Transmission is a 4 speed,, electronically controlled. with overdrive.
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