4l60E black stick??

[Dirtautoguy]

I checked the tranny oil today on my 1996 k1500 with 230000 miles on it, because I hadnt checked it in a while. I found that there was some black stuff on the dipstick. I wiped it off and checked it again and the fluid looked pretty good maybe just barely a little different color than it should. but is the black stuff normal or should I be worried about it? it drives fine and doesnt slip that I can tell, but with 230,000 miles it wouldnt suprise me if it was headed downhill. I might do oil change on it but iv heard very mixed reviews about doing this and I dont know when it was done last and I have had the truck for 35,000 miles so its probably about time anyway. I know when I got the truck it looked like the oil was brand spankin new. what are your thoughts?

[tthomasd614]

Was it a thick clump or was it just like the fluid was black?

 

 

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[Dirtautoguy]

it was just on the stick it wasnt really thick or gritty or anything it was about the consistancy of the fluid

[SouthernSilveradoGuy85]

When I had trouble with the 4L60e in my '98 the trans fluid was burnt, maybe that's what's wrong that maybe it's just time to change it and either you waited way too long or being that the fluid is so old that it's making the clutch packs and all not do right. From what I can remember, even when trans fluid is old it shouldn't turn black, but I don't know if it does after a certain age. Being that you haven't changed the fluid for 200,000 miles I would change it and the filter.