[racerman]

...you know, where they use a machine to completely replace all the fliud, not just whats in the pan? Only reason I ask is I had a guy tell me a while back that its a good idea to do it on cars under 50K miles, but it can be harmful on high milage cars, like beyond 100K miles, said the new fluid (being a kind of detergent) can wash away deposits around lip seals and such that are helping keep things sealed up in the tranny pressure wise, and it can cause some trannys to start slipping. So, anyone here in the know about this? Any experiences? Thanks.
Ken.

 

[Deuces]

If you have kept up on regular changes, it's not a bad idea. If you have let the regular changes go, the deposits are helping the transmission transfer power. Just what I have been told.

 

[Joe]

Just drain and refill.

 

[TSS]

No no flush no. no.

 

[MixedImpala04]

Just drain and refill.

No no flush no. no.

this!!!

 

[12ltz]

DO Not do power flush BAD.

Drop pan, replace filter, reassemble and fill then drive.

 

[463]

No no flush no. no.

2 X

 

[racerman]

this!!!

No no flush no. no.

OK, I'm seeing everyone saying no, but no one is saying why???:dontknow: More input please. Thanks.

 

[463]

The power trans flush cleaning aditives will do way more harm than good to the trans thus shorting the life of the trans. Thats the long and short of it.

 

[Joe]

OK, I'm seeing everyone saying no, but no one is saying why???:dontknow: More input please. Thanks.

There is no need for it. Why take a chance on moving metal shavings around our having an additive in there when you don't need it?

Drain. replace filter. Refill. Continue enjoying your Chevrolet k3:

 

[77Impala]

Also power flushes do not change the filter even though they may claim to. If the pressure is what they call "good" then they tell you that the filter is fine and does not need changed even though you have already paid for it. And sadly many have found that the power flush units have blown out the filters making them useless.

Even if a tranny had dark fluid I would rather change the fluid several times then try a power flush.

 

[racerman]

Also power flushes do not change the filter even though they may claim to. If the pressure is what they call "good" then they tell you that the filter is fine and does not need changed even though you have already paid for it. And sadly many have found that the power flush units have blown out the filters making them useless.

Even if a tranny had dark fluid I would rather change the fluid several times then try a power flush.

OK, thanks guys, thats what I needed to know. k3:

 

[hillsmi]

What fluid is everyone using?

Getting ready to change the fluid / filter on my '04 with 142,000.

What fluid have you all used with good / great outcomes, or what is the best / recommended for a tranny with 142,000.

And to add, this tranny has not been abused. It is a daily driver, >90% highway miles that is driven ~ 1000-1200 miles per week.

Thanks.

 

[Bart77]

The power trans flush cleaning aditives will do way more harm than good to the trans thus shorting the life of the trans. Thats the long and short of it.

Until I have come onto these forums I have never even heard of this type of transmission fluid flush, with chemicals, but I would defiantly stay away from that type of trans flush ANY transmission additive will do more harm than good. I have rebuilt several transmissions and their is nothing inside of any transmission that would warrant an additive to clean out, the only cleaning out these transmissions need is the pan dropped, metal particles cleaned out of the pan and the filter replaced. Transmissions are not engines and they stay squeaky clean inside unless something brakes. The only type of flush I have only heard of and done is the type that the machine is hooked up in line with the trans oil cooler and the engine is run, old fluid gets pushed out by the transmission oil pump and is replaced with fresh new Dexron VI fluid. I have done hundreds of these, even on properly working high mileage vehicles and have had no issues. Of course on higher mileage vehicles I do recommend replacing the trans filter as well.

 

[markymark]

Do these transmison flushes at school and at work all the time. We drop the pan put a new filter in close it up refill then hook into a cooler line and it the pressure pushes the old into the machine and then feeds in the new stuff. We dont add anything but new trans fluid being dex or merc.

 

[77Impala]

.... We drop the pan put a new filter in close it up refill then hook into a cooler line and it the pressure pushes the old into the machine and then feeds in the new stuff. We dont add anything but new trans fluid being dex or merc.

Nice that you do but most places do not change the filter. I have personal experience with this, that is one reason I won't ever have another one done to my vehicles.

 

[kingnutin]

Also, most places do use the additives.

 

[Dave_N]

Thanks for posting this helpful information. I wonder if transmission flushes are helping to contribute to the transmission troubles reported by many Impala owners? I guess I will go with the transmission filter change and fluid drain instead of the transmission flush. My transmission fluid still looks pretty good even after 6 years and it still shifts relatively smoothly.

 

[TSS]

Dave, I honestly don't think the flushes are the real issue. The trannys go bad without the flushes. Even more so with the SS. It just seems that the flush can speed up the whole process regardless of your model.

 

[Dave_N]

It's just a shame that the trannies are so weak. The engines are well built and are quite powerful. I'll get a transmission fluid drain and filter change next year, but no powerflush. And Dexron 4 for sure.