
10-06-2006, 05:19 PM
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Junior Member
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Join Date: Apr 2005
Posts: 150
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More fluid for AT tranny than MT?
After my mom's `95 legacy dropped 10+ qts of fluid in the driveway, I got to
thinking. Does the automatic transmission vehicles hold more fluid than the
manual transmissions??
The reason I ask is that I'm going to drain my fluids and put in the "Uncle
Scotty Cocktail Mix". yet the total amount of fluids is 4 quarts, unlike
the 12 quarts for my mom's vehicle. Am I missing something here or do the
sizes of the transmissions make that much difference??
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10-06-2006, 05:42 PM
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Junior Member
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Join Date: Jul 2006
Posts: 48
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More fluid for AT tranny than MT?
Yes, you are failing to consider that the torque converter and the
hydraulic system within the transmission hold lots of fluid. Normally
when you change the fluid in an A/T you only get what is in the oil pan.
If you go to autozone.com, in the repair guides, specifications, you
will see that they show much less fluid needed to replace the fluid in
an A/T than the actual capacity specified by the manuals.
Glad your mom's car is running again.
Bradley Walker wrote:
Quote:
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After my mom's `95 legacy dropped 10+ qts of fluid in the driveway, I got to thinking. Does the automatic transmission vehicles hold more fluid than the manual transmissions?? The reason I ask is that I'm going to drain my fluids and put in the "Uncle Scotty Cocktail Mix". yet the total amount of fluids is 4 quarts, unlike the 12 quarts for my mom's vehicle. Am I missing something here or do the sizes of the transmissions make that much difference??
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10-07-2006, 05:36 AM
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Junior Member
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Join Date: Jan 2005
Posts: 230
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More fluid for AT tranny than MT?
Quote:
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The reason I ask is that I'm going to drain my fluids and put in the "Uncle Scotty Cocktail Mix". yet the total amount of fluids is 4 quarts, unlike the 12 quarts for my mom's vehicle. Am I missing something here or do the sizes of the transmissions make that much difference??
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Yes, you're missing the fact that Scotty's
cocktail is for the MANUAL tranny.
Use only the OEM prescribed ATF for the
automatic.
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10-07-2006, 08:59 AM
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Junior Member
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Join Date: Aug 2003
Posts: 576
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More fluid for AT tranny than MT?
Bradley Walker wrote:
Quote:
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thinking. Does the automatic transmission vehicles hold more fluid > than the manual transmissions??
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Hi,
Yes, as others noted, ATs hold a lot more due to the torque converter.
Be careful when filling to follow the directions for checking the levels
carefully--w/ many ATs it's easy to over or underfill the trans if the
level's not checked properly.
On YOUR gearbox, what's this Uncle Scotty's Cocktail Mix? At first
blush, it sounds to me like something some shade tree guy w/ a six pack
came up with in a half hour that's "better" than anything the guys who
develop fluids for a living can come up with? I'd refill an MT w/ the
recommended weight fluid, either dino or synthetic, and forget about
mixing "cocktails."
Rick
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10-07-2006, 11:45 AM
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Junior Member
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Join Date: Apr 2005
Posts: 150
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More fluid for AT tranny than MT?
I think I forgot to mention that my car is a manual transmission, although
I've mentioned that in earlier posts.
"Bradley Walker" <bawalkerREMOVE@THISmodemnet.net> wrote in message
news:SgDVg.2489$ya1.183@news02.roc.ny...
Quote:
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After my mom's `95 legacy dropped 10+ qts of fluid in the driveway, I got to thinking. Does the automatic transmission vehicles hold more fluid than the manual transmissions?? The reason I ask is that I'm going to drain my fluids and put in the "Uncle Scotty Cocktail Mix". yet the total amount of fluids is 4 quarts, unlike the 12 quarts for my mom's vehicle. Am I missing something here or do the sizes of the transmissions make that much difference??
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10-07-2006, 11:53 AM
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Junior Member
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Join Date: Apr 2005
Posts: 150
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More fluid for AT tranny than MT?
The "Uncle Scotty Cocktail Mix" is actually a mix of different transmission
fluids that many subaru owners have had success with in manual transmission
cars to solve or provent issues with the synchro gears. Check out this
link:
http://forums.nasioc.com/forums/showthread.php?t=920674
"Rick Courtright" <rcourtright@iname.com> wrote in message
news:4527DD00.910423EB@iname.com...
Quote:
Bradley Walker wrote:
Quote:
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thinking. Does the automatic transmission vehicles hold more fluid > than the manual transmissions??
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Hi, Yes, as others noted, ATs hold a lot more due to the torque converter. Be careful when filling to follow the directions for checking the levels carefully--w/ many ATs it's easy to over or underfill the trans if the level's not checked properly. On YOUR gearbox, what's this Uncle Scotty's Cocktail Mix? At first blush, it sounds to me like something some shade tree guy w/ a six pack came up with in a half hour that's "better" than anything the guys who develop fluids for a living can come up with? I'd refill an MT w/ the recommended weight fluid, either dino or synthetic, and forget about mixing "cocktails." Rick
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10-07-2006, 10:16 PM
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Junior Member
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Join Date: Jul 2006
Posts: 48
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More fluid for AT tranny than MT?
I am missing nothing. I explained why auto transmissions use more oil,
but just so you feel good, I am a moron,
CompUser wrote:
Quote:
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The reason I ask is that I'm going to drain my fluids and put in the "UncleScotty Cocktail Mix". yet the total amount of fluids is 4 quarts, unlikethe 12 quarts for my mom's vehicle. Am I missing something here or do thesizes of the transmissions make that much difference?? Yes, you're missing the fact that Scotty's cocktail is for the MANUAL tranny. Use only the OEM prescribed ATF for the automatic.
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10-08-2006, 02:09 PM
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Junior Member
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Join Date: Aug 2003
Posts: 576
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More fluid for AT tranny than MT?
Bradley Walker wrote:
Hi,
Actually, I DID check before my initial reply. Let me repeat, "it sounds
to me like something some shade tree guy w/ a six pack came up with in a
half hour that's 'better' than anything the guys who develop fluids for
a living can come up with."
How do you KNOW it cures synchro problems? How do you KNOW it prevents
synchro problems? Have these guys done the head to head testing the
engineers and chemists have spent a kazillion man hours, miles and
dollars doing?
You could go out there this afternoon, drain your gearbox, refill it w/
straight 30 wt motor oil (I'm NOT recommending anyone do this!) For a
while it MIGHT feel "better" (there HAVE been gearboxes that used
regular motor oil and some of them DO feel slick.) You can post all
kinds of glowing reviews based on your first week's "fantastic
improvements"--the Internet certainly allows the dissemination of
misinformation faster than anything we've come up with before! However,
I doubt you'll be back in 250k miles claiming "30 wt is better than the
75W-90 the factory recommends."
But that's just opinion and experience talking. What do I know?
Rick
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10-08-2006, 03:32 PM
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Junior Member
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Join Date: Apr 2006
Posts: 48
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More fluid for AT tranny than MT?
On Sat, 07 Oct 2006 19:53:28 GMT, "Bradley Walker"
<bawalkerREMOVE@THISmodemnet.net> wrote:
Quote:
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The "Uncle Scotty Cocktail Mix" is actually a mix of different transmissionfluids that many subaru owners have had success with in manual transmissioncars to solve or provent issues with the synchro gears.
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Do you actually OWN a car, or do you simply drive your mother's? <G>
Anyone who would put a "cocktail" created from an Internet recipe into
a perfectly good car, ignoring the manufacturer's recommendations for
the proper fluid, is a moron.
Do you really think if this "cocktail" was worth a salt,
a.) Someone would sell a commercial version
b.) The manufacturers would use it
Seriously... <G>
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10-08-2006, 03:37 PM
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Junior Member
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Join Date: Aug 2003
Posts: 792
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More fluid for AT tranny than MT?
Rick Courtright wrote:
Quote:
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Bradley Walker wrote: Hi, Actually, I DID check before my initial reply. Let me repeat, "it sounds to me like something some shade tree guy w/ a six pack came up with in a half hour that's 'better' than anything the guys who develop fluids for a living can come up with." How do you KNOW it cures synchro problems? How do you KNOW it prevents synchro problems? Have these guys done the head to head testing the engineers and chemists have spent a kazillion man hours, miles and dollars doing? You could go out there this afternoon, drain your gearbox, refill it w/ straight 30 wt motor oil (I'm NOT recommending anyone do this!) For a while it MIGHT feel "better" (there HAVE been gearboxes that used regular motor oil and some of them DO feel slick.) You can post all kinds of glowing reviews based on your first week's "fantastic improvements"--the Internet certainly allows the dissemination of misinformation faster than anything we've come up with before! However, I doubt you'll be back in 250k miles claiming "30 wt is better than the 75W-90 the factory recommends." But that's just opinion and experience talking. What do I know? Rick
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I doubt that scotty's mix is all that bad. I also doubt it's better than
Redline 75-90NS (especially after a few hundred miles of 'wearing
in/cleaning).
And are we talking about older trannies that have a lot of wear? might
need a change anyway? have moisture built up in them? Or newer ones? or
trannies with actual problems but not torn down/inspected yet? what if a
different or heavier oil is just masking a real problem?
Carl
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