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STS 3.6 DI Performance | ATS 2.0T
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208 Posts
Discussion Starter #1 (Edited)
Hi guys,

I'm going to flush my tranny tomorrow (100k on it).

Dou you know which cooler pipe is outlet which one is inlet?
Is this described somewhere?
I can't find it on alldatadiy.com

6L50

Thanks!
 

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2006 STS 1SF N* RWD NAV F55
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705 Posts
Flushing is NOT recommended, Drain and refill "IS".
Got mine done, for about 120 D.
Then I know it's done right.Correct Fluid and Level.
Happy Motoring :cool2::cool2:
 

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08 STS4 V8 1SG & 04 SRX4 V8 & 01 Monte SS
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4,988 Posts
a flush is a high pressure process that can blow out seals inside the trans in areas that don't typically see high pressures.
It also typically introduces a bunch of foreign contaminants from the trans flushing system... such as metal filings from a previous transmission flush.

Drain, new filter, wipe off any metal filings that have been collected on the plug's magnet ... if there is a pan removal as well you can wipe that off as well, put it back together and refill and done.
If you feel like you didn't swap enough fluids you could always do it again after a few miles but I don't know anyone that would.
 

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STS 3.6 DI Performance | ATS 2.0T
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208 Posts
Discussion Starter #7
I though do flush just via outlet line so tranny will pump out old oil in to the botlle or can.
Then re fill and repeat flush until oil come out clean.

Oil (old or new) flows through all tranny parts all the time and any dust, dirt etc should be stopped in the filter right?
I thought new oil will provide better cooling and viscosity.

I have to consider it.
 

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'11 CTS-V Coupe M6, '05 1SG STS4 V8
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377 Posts
Yeah I'm not sure why everyone thinks you own a dealer's used trans flushing machine...they hear 'trans' and 'flush' in the same sentence and freak out. Lol.

Just my opinion, but since the trans takes 6 or 7 quarts, I'd just do a pan drop and refill, with a new filter. With that much fluid, there won't be much old stuff mixed in with the new. Plus you can clean the crap out of the pan and the magnet. Just make sure the car is level when pumping in the new fluid.
 

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2005 STS N*, 1SF, 144K mi.
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650 Posts
Boat, to be fair, the term "flush" is different than a fluid exchange, which is what the OP describes. From what most of us have experienced, "trans" and "flush" in the same sentence is worthy of complete freak-out.

I considered doing it with the lines and to large, new plastic buckets, but feared I'd not get the correct amount back in, or lose too much while reconnecting the fittings.

Do yourself a favor and put a drain plug in the pan. The fill plug is really unpleasant to access and use, while the engine is warm, as it's immediately next to the exhaust.

Next time, though, you merely turn a lever to drain and use an inexpensive, simple hand pump to put exactly how much came out, back in.

http://www.cadillacforums.com/forums/cadillac-sts-forum-2005-through-2012/331698-changing-you-transmission-fluid-solved.html
 
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