My Mystique (1998 LS, 80Kmiles ATX) hasn't needed it yet, but we replaced the MLPS on my father's 1992 Sable when it failed to go in Reverse sometimes. The new MLPS solved the problem. Sometimes the TSS (located in wheelwell) is bad, but it tends to cause harsh shifting. The TSS gets rusted in there good (especially in Rochester, I am from there too). I replaced mine, best avoided unless you are sure you need it. I noticed your sig,I just put in Mobil 1 ATF, I like it. That original waterpump will fail any day now. Mine went at 78kmiles, my sister's was about to go at 70 kmiles when we changed it. I used a metal impeller Delco part, works good.
