Question about 1997 Saturn SL

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Transmission problems I took used tranny out of 1997 Saturn SL2 DOHC 1.9 engine which is the same as mine. It will not shift out of low gear. How do I tell what gear ratio it is. Also what does the two black screw in sensors do I had to replace one of them in used tranny.

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I have a 97 SL2 and it has the typical slam into reverse, but also after a couple minutes of driving it downshifts... It stays there for like 3-5 minutes then runs fine afterwards... What is the problem?

Posted on Oct 08, 2010

  • bkjones4 Oct 08, 2010

    sorry that solution was as a question...didn't know what I was doing at the time...

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If you have the same year that is only part of the swapping process. You need to have the same transmission. The SL1 use the MP6, which is a economy ratio'd transmission. The SL2's use the MP7 which is a performance ratio'd transmission.

You need to have the correct year range and correct model level. So if you have an SL1 then you need a 1993-1997 MP6 (out of another SL1). If you have an SL2 then you need a 1992-1997 MP7 (out of another SL2).

Your computer has no idea how to shift the current transmission and hence why it won't shift out of any gear.

In order to identify transmissions, look on the bell housing where it meets the engine. Clean it off really well because there is a dot matrix stamping on it with a serial number. 3 of the characters in that serial number is MP6 or MP7.

Posted on Feb 04, 2010

  • Jta91
    Jta91 Feb 04, 2010

    Also I meant to add that it doesn't have to be an SL, as long as your on the right model "level" 1 or 2 then an SC and SW work as well (coupe and wagon).

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