Transmission acts up over 45 mph

1994 FORD TEMPO
104,000 MILES • 2.3L • 4 CYL • 2WD • AUTOMATIC
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ORPXLE
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When I drive under 45 mph my car runs great with no issues, but when I go anywhere between 45 and 65 (second gear I assume)it acts like it wants to shut off. Or it struggles to get into the next gear. If I press the gas down and here the engine rev but my speedometer goes down. I turn the car off start it then all is well until I go over 45. I do not have a rpm gauge so I do not when it shifts. I changed the transmission filter so first gear works fine. I am told it might be a sensor on the transmission but I do not know.
Oct 12, 2018 at 10:41 PM
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STRAILER
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This sounds like you have a catalytic converter that has fallen apart and is blocking the exhaust system. Here is a guide to help you confirm the issue:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please run down this guide and report back.

Cheers, Ken

Oct 15, 2018 at 11:49 AM