4l30-e

How many miles can I expect out of this tranny when proper maintenance is done and it is never driven hard? At 125K and counting.

I've seen reports of owners with around 200Kmi on their original 4L30E. I would say that is rare though. IMHO- 150Kmi is more realistic. These aren't terrible transmissions, but their are better ones out there!
G/luck
Joel

Just got a '99 with 73K on it. Don't know if the tranny fluid was ever changed. Would you recommend a flush and fill which should replace 100% of the ATF or just dropping the pan and changing the filter which would replace 3 out of 9 qts? Or is there another option?

JWS

Have the pan dropped. And then in about 15k have it flushed.
-Ryan

my 4L30E is now dyeing but it has 276k on it what killed it was my wife driving in OD in the mountains it has served its time and I am going to repolace it with one that is a bit over 100k for $550

276k miles, right? If so, that makes me smile!