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[Shop-talk] Auto xmission fluid change

Subject: [Shop-talk] Auto xmission fluid change
From: pat at hornesystemstx.com (Pat Horne)
Date: Fri, 13 Apr 2012 14:26:54 -0500
References: <6.2.5.6.1.20120412095138.04c18180@cox.net> <Pine.LNX.4.64.1204121129300.10168@thunder.banklogic.net> <004101cd18e6$83a4c210$8aee4630$@ameritech.net> <007801cd18ee$a6efaa20$f4cefe60$@net> <4F879033.20506@tx.rr.com> <09b701cd199e$fd47ca00$f7d75e00$@rr.com>
I just changed the trans fluid on my 2008 Honda CRV. IT has a drain 
plug, which I found great, but I also found out that it did NOT have a 
trans filter, which I find a bit disturbing. I didn't drop the pan to 
check for gunk (75,000 miles), but will next time. So far it is not 
giving us a bit of trouble.

Peace,
Pat

Thusly spake Randall, On 4/13/2012 12:58 PM:
>> I've always wondered why manufacturers don't put drain plugs in
>> transmission pans.
> I've heard several justifications for that; the one that seems most likely
> to me is that changing transmission fluid is a rare enough occurrence that
> it isn't worth the extra cost and complexity of a drain plug plus an
> external oil filter (so the filter can be changed without dropping the pan).
> But it's also a Good Thing IMO to wipe out the bottom of the pan, to both
> remove dirt and to see any evidence of impending failure.
>
> I guess I've been lucky, all of my vehicles with automatic transmissions
> have gone essentially their entire service life with only routine
> maintenance to the AT.  Except for the motorhome (Torqueflite 727 behind a
> 440-2) that had a tendency to overheat the ATF until I added a cooler.  The
> 4L60 in my current hauler has gone some 260k with only a (partial) fluid and
> filter change every 100,000.
>
> My opinion, unless you've let it go too long, changing just part of the
> fluid and the filter is good enough.  The oil itself does not wear out, and
> by replacing part of it you have both adequately removed a substantial
> portion of the dirt, and replenished the additives that do wear out.
>
> -- Randall
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-- 
Pat Horne, Owner, Horne Systems
(512) 797-7501 Voice            5026 FM 2001
Pat at HorneSystemsTx.com       Lockhart, TX 78644-4443
www.hornesystemstx.com
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