95 Lumina trans slips on take off

[sparkiem]

I have 95 Lumina with a 3.1 engine and a 4T60-E transmission. This car has 172,00 miles. I have taken very good care of this car. It started this all at once as for as I can tell, I mean I had not noticed any thing out of the ordinary until last night I backed out of my drive and when I started to go forward I noticed that it slipped just a little before it went on. I drove it about 60 miles and each time I stopped it slipped a little more taking off. It does the same thing in reverse. It works fine after it takes off, no problem with passing gear or anything, just taking off it slipps. I changed the fluid and filter this morning, it did not help, I did not really think it would, because it had only been about 25,000 since I changed it. The fluid did not have a bad smell or color, nothing in pan. Any ideas would be greatly appreciated.
Thanks

[sparkiem]

Hey guys
I did not get any responses, but I put a quart of a transmission helper called K&W in this morning and at the present my transmission is working great, I don't know how long it will last. I am hoping that I just had a valve sticking and this stuff has cleaned it up.!!! I have now driven this car 300 miles and it has not slipped once on take off.

[meuhus]

Originally Posted by sparkiem

Hey guys
I did not get any responses, but I put a quart of a transmission helper called K&W in this morning and at the present my transmission is working great, I don't know how long it will last. I am hoping that I just had a valve sticking and this stuff has cleaned it up.!!! I have now driven this car 300 miles and it has not slipped once on take off.

trans could just be getting old
my 91 was not engaging into gear on decell to accell
unless i stopped completely

and as misteriouly as it showed up
the problem went away