I've been leary of your crook...I mean mechanic for quite a while.

Ask around friiends and parents friends for names and references of good reliable mechanics. They are out there..but you need to look for them.

Eric, the tranny fluid, filter, and gasket is really easy to do.
I did it myself for the firstime every last year.

Guys would a bigger or second tranny cooler help in this case?

No on having two coolers, but a larger one may be in order. But thats me

Eric wouldn't have a cooler from the factory. It wouldn't hurt to add a reasonably sized one.

Some around here have been oversize cooler happy and it may hurt in the winter..

I wonder if you don't have some kind of vacuum leak that caused this. IIRC, the 4T60E was more reliant on vacuum controls where the 4T65E went electronic. The hissing sure indicates an air leak of some kind, and that is the only thing I can think of that these trannies use for air.

Now that its working again, are you still hearing the hiss?

Alright guys here is where I need help. Just recently the check engine light came on in my 99 SSEi. It seems when I take off from a stop it struggles but it only does it when it is at normal operating temps. When it is cold it shifts very smooth but still does the same thing it did before. As it shifts from 2nd at 42 mph, the tranny shifts but drops the rpms to 1500 like it is going into OD. Now I am really worried and I need to know exactly what is wrong and fast I am using my 92 as a back up but I need to know what is wrong with my 99. The fluid is a lt. pink but smells burnt. If it comes to replacing the tranny I need to know if anyone has a decent one they are willing to part with. Thanks alot guys.

A.J.

OK, it was just a thought. I wasn't sure what all the 60 used vacuum for, but it was the only thing I could think of that might cause a hiss. If that isn't it, I would put my money on a PCM hiccup. I had a 95 Regal GS for a while and part of the reason I got rid of it is that I was sick of having a OBD I/II hybrid that no one knew how to work on. That tranny (also a 60) gave me no end of trouble, particularly the torque converter. I never had this issue though.

I read the article.

What kind of "flush machine" are we talking about.... The only one that I have seen my
tranny-guy use does exactly what the article says to do by yourself.... the only thing is that it does it automatically, instead of you pouring in the clean fluid....

It has two separate containers, one full of new fluid, and the second one to collect the old fluid. You take off the line at the cooler, hook up the new fluid input to one side, and the old-fluid output to the other. Start the machine and the car, and the dark fluid empties while the new fluid replaces it.

Since new fluid is always flowing out of the new-fluid container, how can that "contaminate" anything???


And by the way, guys, fluid colour may or may not be a good indication of tranny health. My 1997 turns the colour of crankcase oil in about 10,000 km (which is why I DO replace the complete fluid every year or two). It has been that way since I bought it about 40,000km ago and who knows how long before. It has not yet hiccupped, touch wood. Tranny guy says he never seen anything like it, says with colour like that should have all kinds of code-sets, etc, but nothing ever happens.

Matters not to me because I negotiated the purchase price with the idea that I may have to replace the tranny, anyway.

Tranny guy says problem with this series of trannies is a bad design in a valve that operates way too much. He offers a modified rebuild for $1800 installed. I keep thinking that its time to do it, but then the black oil pulls me through for another year or two and so..."let'* wait some more"....

It will probably get done before winter.

Maybe.

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