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Q: wont go over 40 mph & doesnt seem to shift od light on when od isnt on 1994 Volvo 940

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
also have heard some hissing noise as well, what is this caused by??? Thank you for your time
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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It sounds like you have a few issues going on here.
1. Won't go over 40 mph. There are several possibilities, could be a failing fuel pump, mass airflow sensor or fuel pressure regulator, or something else. Need a proper diagnosis to determine what is causing this.
2. OD Light: Most likely the OD relay is failing, very common issue on the 940.
3. Hissing noise: noises need to be heard and an inspection performed to determine where it is coming from, otherwise it's a very wild peculation, and will always be wrong.
An experienced Volvo tech can figure these things out fairly easily, as these are fairly common complaints for this vehicle.
i have just had those same symptoms, i replaced my transmission filter first
actually i seen shavings on the filter but i replaced it anyway it helped but i had to replace the trans
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