4L80 question

[Deere Freek]

I've got 75,000 miles on my truck and a friend just happened to ask me when the last time i had my tranny flushed was :eek6: :eek6: um.............. as ashaimed as i am to say it. Anyway I've been told that if it's over 60k miles and nothing has been done to just leave it alone. Is this good advice or should i have it done onmy next oil change?

Thanks

Joel

 

[SnowDrift]

I've never heard anything good about a flush. All I've ever heard is horror stories after someone does one. However, it's not ever too late to CHANGE the ATF and filter in one (unless it's slipping beyond hope).

When I got mine, I changed the ATF 4 times (drain and refill, then drive for a week. Drain and refill, then drive for another week and so on), I think and I forget what that yields in regards to a final new to old ratio, but it was nice and bright red when I was all done. I also added the additive, with my last fill, that Heath sells - Lube Guard in the red bottle. I found it at a local NAPA.

I try to change mine every 10,000 miles or so. I go a little longer in my wife's Suburban.

 

[chrisk1500]

Don't flush it now!

Just a simple drain and filter change as already indicated....

 

[Pillow]

I usually change tranny fluid every 50K.

... As for the rearend and transfer case. They get neglected. Anyone have a good change interval for these items?

 

[Deere Freek]

What kind of problems doesit cause when you flush it?? just curious

 

[JiFaire]

I flush mine every... now let me think.. hmm.

Okay, next question?

 

[Deere Freek]

I flush mine every... now let me think.. hmm.

Okay, next question?

haha, sounds familiar....