Questioni have an 89 cadillac deville and i started having problems shifting from 2nd to third gear...it has a hard time passing about 28-30 miles an hour...changed the transmission filter a few weeks ago and now suddenly will not shift into third at all and is overheating...
AnswerHello,
I will start by telling you my expertise is not in transmissions and I cannot answer your question.
However, I am deeply concerned about a comment you made about overheating and I hope I am not too late.
This is an aluminum engine. If the temp gauge goes above 3/4, your engine is sustaining severe damage!!!!!!
You can't buy a used engine either because chances are real good it too was overheated and junk. From 1982 forward to now, Cadillac has always used an aluminum engine and they are notorious for problems associated with owners that thought they had a cast iron chevy engine which could be run hot doing little damage!
Such is not the case with the Cadillac engines. If one is lucky, all he did was blow the head gaskets. The hotter and longer the engine runs, the heads will crak or warp, the block may crack. In such cases I have seen $4k for a brand new engine!
My suggestion is get the car over to a transmission shop. If you think you will overheat, call a tow truck!
If the engine is going through anti-freeze now, you did some sort of catastrophic damage already. If white smoke is coming out of the exhaust, you now know at minimum you need head gaskets.
Before you take it to a trans shop, let the engine get to normal operating temp. See if the temp gauge goes above 1/2. Shut down engine. Check the oil. If milky colored, head gaskets are blown.
I answer Cadillac overheating problems at least 2 times a week.
Cadillacs are a nice car, but the owners find out too late just how terrible the engine design is after they over heat it.
I hope I caught you in time and that you did not damage the engine.
Although I could not answer your transmission problem, I hope my explanation about over heating the engine helped you.
