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Old 07-03-2008, 11:23 AM
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th125 fluid flush... now broke?

i bought an '89 celebrity recently, and went through all the "catch up" maintenance. Yesterday I flushed the transmission. The fluid looked good, not perfectly scarlet but close, no smell. The pan looked decently clean, no factory plastic plug in it, so I assume it was maintained. I drained and filled the pan, then ran the car in park while draining the fluid that was pushed out of the cooler, while pouring in the same rough amount into the dipstick. Put it all back, topped off the fluid, and now... I think I broke the tranny.

It shifts slower, revving up a little between shifts. Sometimes it seems like the torque converter is acting up... it "slips" at the start of each gear a little than catches fully, and it will occasionally die in drive while at a light, with a little forward lurch.

Now, the CEL light does come on at times, with one of the codes being the vehicle speed sensor. I'm told that controls the converter lockup. Can it be that the new fluid exasperates a pre-existing condition? Or am I not that lucky?

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Old 07-03-2008, 11:32 AM
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Check the fluid again, sounds like it is low after running it filled the converter, cooler, and valve body back up. You are checking it running and in park, right?? Make sure you check both sides of the stick because fluid drag up the tube can put a false reading on just one side of the stick.

It is also possible that you disturbed an electrical connection outside the trans somewhere. Almost 20 year old wiring around engines and tranny's gets brittle with heat and time.

Last edited by ericnova72; 07-03-2008 at 11:35 AM. Reason: more info
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