92 Olds cutlass supreme 3.1L , difficult shifting

1992 OLDSMOBILE
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CLIMBCOVEY
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My sister in laws cutlass will not shift into higher gears with acceleration. Starts from a stop just fine, usually gets second gear but at 50 + mph Its sticking at 4000 rpms and up. just replaced broken tv cable. Possible problem with vacuum modulator. Which one could/would cause this problem?
Jan 15, 2007 at 9:15 PM
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HUKAMAN
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I own a 91 cutlass supreme 3.1L myself currently has 189,000mi which had shifting (it would shift in and out of overdrive at high speeds around 165,000 i had these problems) problems that where somehow related to my fuel system when it wasn't functioning properly. But before I replaced the fuel injection system. It was a first step is to replace the modulator. And I would also check your transmission fluid in case it has been very abused and never changed or if the fluid is dark it could be burnt also.
Jan 23, 2007 at 5:45 PM