New fluid, now slips when cold
The guy I bought my truck from said he changed the tranny fluid every 60K miles and mine was now due for that (it has 120K).
So I order a new WIX filter online and buy five gallon jugs of Super Tech Mercon/DexronIII at China Mart. I went with the simple "drain the pan, drain the TC, clean the pan, put in the new filter, put it all back together" technique.
A few things I noticed: 1) There was what seemed to me like quite a bit of sludge on the magnet. 2) The old fluid had a sweet smell, almost like cherry flavored cough syrup. Did I have antifreeze in my tranny fluid?
Now, until my engine is up to running temp, the tranny slips. It is very sluggish in lower gears and I can watch my rpms go from 2500 (70 mph on the highway in OD) and then it will drop down to 2000 as soon as it gets warm.
It isn't low on fluid. Is the problem the cheapo fluid I bought? Or is this just a warning flag as to what is to come and that guy should have changed it every 30K?