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Unread 05-02-2013, 02:24 PM   #1
Indian
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Automatic Transmission - Flush and Fill

Hi All,

I have 2008 Jeep GC Larado 4X4 with 122k miles on it; i had a auto trans flush and fill at 60k and Jeep recommends a flush and fill every 60k;

I have heard from a few people that its risky to flush and fill a high millage auto trans as it may cause it to go out.

Any thoughts or experiance on this ?

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Unread 05-02-2013, 02:33 PM   #2
Budasac
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I know a guy who owns a shop and has had a few high mileage trannies blow after a flush. Some swear by it though. I always just drain and fill.

Jeep does not reccomend flushing.
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Unread 05-02-2013, 02:51 PM   #3
Indian
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Quote:
Originally Posted by Budasac View Post
I know a guy who owns a shop and has had a few high mileage trannies blow after a flush. Some swear by it though. I always just drain and fill.

Jeep does not reccomend flushing.
I think i ment drain and fill....

what is the real difference between drain and fill and flush and fill.... dumb question i know.
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Unread 05-02-2013, 03:04 PM   #4
colinzj
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Drain and fill: The transmission is drained. The transmission is then filled with fresh fluid. This is the approved service method for current passenger vehicles, including Jeep.

Flush and fill: The transmission is flushed by some kind of machine, possibly using a "cleaning additive" not approved by the manufacturer (which may or may not damage the clutch materials or seals), possibly using pressure not approved by the manufacturer (which may or may not damage the hydraulic system or seals). The transmission is at some point filled with transmission fluid, usually by the same machine. Most manufacturers now explicitly state that flushes are not to be performed.
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Unread 05-02-2013, 03:10 PM   #5
Indian
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Correction to my previous post.........

I want to Drain and Fill my Auto Trans @ 122k Miles.....

What do you guys think ?
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Unread 05-02-2013, 04:24 PM   #6
Budasac
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Absolutely. It certainly can't hurt.

Be sure to replace the filters as well.
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Unread 05-02-2013, 06:36 PM   #7
S197GT
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i had my transmission flushed and filled at the dealership. had 98k miles or so on it. everything has been fine. i'll do a drain and fill from now on. but that was the first transmission service i had done on it since we bought it used.

used to be a general rule (maybe an old wive's tale) that if your transmission fluid had never been changed on a high mileage vehicle to just leave it alone. but i'm not sure that is true any more with modern vehicles.

everyone has heard a story of a transmission crapping out after a fluid flush/drain but no one ever seems to have first-hand knowledge of it actually happening.
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Unread 05-02-2013, 08:21 PM   #8
jebo0420
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I do!!!! I worked at an Firestone in Daytona, had a Chevy Cobalt trans poop the bed after a flush.... Although you don't get all the fluid out with a drain and fill, it's safer. Most shops won't do a flush after 100k without records showing it being done before.
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Unread 05-02-2013, 09:49 PM   #9
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Drain and fill is the way to go. The ATF used in our transmissions is really high quality so unless you have never changed it and have crazy high miles like 200k, you're probably fine to service it. I would never do a flush though.
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Unread 05-03-2013, 08:15 AM   #10
JeepCares
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Quote:
Originally Posted by Indian View Post
Hi All,

I have 2008 Jeep GC Larado 4X4 with 122k miles on it; i had a auto trans flush and fill at 60k and Jeep recommends a flush and fill every 60k;
As others have pointed out, Jeep doesn't recommend a transmission flush. A drain and fill is the way to go.

The wording in the owner manual (for a gas engine) is:
Change the automatic transmission fluid & filter.

Here's a service bulletin:

SERVICE BULLETIN NUMBER: 26-001-09
GROUP: Miscellaneous
DATE: September 24, 2009
SUBJECT:
Fluid Flushing Requirements
MODELS:
2005 - 2008 (CS) Pacifica
2006 - 2009 (D1) Ram Truck (3500 Pick Up)
2010 (D2) Ram Truck (3500 Pick Up)
2007 - 2010 (DC) Ram Truck (3500 Chassis Cab)
2005 - 2009 (DH) Ram Truck (1500/2500 Pick Up)
2010 (DJ) Ram Truck (2500 Pick Up)
2005 - 2008 (DR) Ram Truck (1500 / 2500 Pick Up)
2009 - 2010 (DS) Ram Truck (1500)
2005 - 2009 (HB) Durango
2007 - 2009 (HG) Aspen
2009 - 2010 (JC) Journey
2007 - 2010 (JK) Wrangler
2005- 2006 (JR) Sebring Sedan & Convertible/Stratus Sedan
2007 - 2010 (JS) Avenger/Sebring
2008 - 2010 (KK) Liberty
2007 - 2010 (KA) Nitro
2005 - 2007 (KJ) Liberty
2009 - 2010 (LC) Challenger
2005 - 2010 (LE) 300C/300C Touring (International Markets)
2005 - 2010 (LX) 300/Magnum/Charger
2007 - 2010 (MK) Compass/Patriot
2005 - 2010 (ND) Dakota
2005 - 2006 (PL) Neon
2007 - 2010 (PM) Caliber
2005 - 2010 (PT) Chrysler PT Cruiser
2005 - 2007 (RG) Chrysler Voyager (International Markets)
2005 - 2007 (RS) Town & Country/Caravan/Voyager
2009 - 2010 (RT) Town & Country/Grand Caravan
2005 - 2006 (TJ) Wrangler
2005 - 2006 (VA) Sprinter
2007 - 2010 (VB) Sprinter
2005 - 2010 (WH) Grand Cherokee (International Markets)
2005 - 2010 (WK) Grand Cherokee
2006 - 2010 (XH) Commander (International Markets)
2006 - 2010 (XK) Commander
2005 - 2010 (ZB) Viper
2005 - 2007 (ZH) Crossfire
DISCUSSION:
Chrysler Group vehicle fluid systems do NOT require regular flushing. These systems include: engine oil, transmission oil, axle lube, brake fluid, power steering fluid, and refrigerant. The only exception to this requirement are published in the vehicle maintenance schedules, e.g. engine coolant.
Exceptions to this recommendation include only those instances where a failure has occurred and/or the system has become compromised, contaminated or overheated beyond the normal operating range.
Chrysler Group does NOT recommend aftermarket chemicals to flush the engine, transmission, brake or steering systems. Chemicals contained in these products can damage the system elastomeric components, and contaminate the component fluid, leading to loss of system/component durability and service life. When necessary, only the original approved system fluid should be used to flush these components using teamPSE®
approved equipment.
If the engine coolant contains a considerable amount of sediment, clean and flush with Mopar Cooling System Flush, p/n 04856977, or equivalent. Follow with a thorough rinsing to remove all deposits and chemicals. Refill with a minimum of a 50% mixture of the specified coolant and distilled water.
POLICY:
Information Only
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Unread 05-03-2013, 08:51 AM   #11
BonesWK
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Like others posted NO FLUSH
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Unread 05-03-2013, 05:01 PM   #12
rsurran
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I just had my tranny drained, filter kit, and refill at 92k miles because I didn't know the history and it was bugging me. I think it shifts smoother and runs quieter.
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Unread 05-04-2013, 08:34 AM   #13
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While the flush is not required, if done regularly, it doesn't hurt the transmission. The cases that the transmission went bad was in a very high mileage transmission, 100,000+ miles, that was drove hard and neglected. The problem is that the gunk in the transmission is probably clogging holes in seals or filling in imperfections that once cleaned out, then causes an issue. The transmission was likely damaged before the flush and the flush just made it so the problems were able to be seen. This is the same as flushing a high mileage engine.

Flushing is not necessary and it does have detergents in it to help clean out impurities in the system. If you want it done and want to make sure what is used is safe for the transmission, take it to a reputable dealer service center. I work at a dealer and we do offer transmission flush service with Chrysler approved equipment and certified technicians.

Also to be clear a drain and fill only replaces about 20-30% of the transmission fluid since it only replaces what is actually in the pan. The 545RFE holds a total of 14 quarts of ATF fluid but the pan holds roughly 5 quarts. A drain and fill service drains what is in the pan, pulls the pan, replaces the filters, re-seals the pan, and refills the pan with fluid.

A full flush requires a special machine that connects to the input and output lines of transmission cooler and pulls all of the old fluid out and puts all new fluid in. This service usually does not include pulling the pan and replacing the filters.
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Unread 05-04-2013, 09:08 AM   #14
jebo0420
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^ +1 I never added the detergent when I did the flushes, just for piece of mind. Most of the trans fluid today is so high in additives & detetgents I can last 100k changing @ 60k is just playing it safe IMO
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Unread 05-04-2013, 01:01 PM   #15
johngreen1234
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This is why I am reluctant to go to a dealer, even though the "Jeep" name is on the door.

The factory says NEVER flush unless there is visible damage to the transmission, and yet many dealers go ahead and do it anyway. The factory also says that if there IS damage, NOT to flush with a detergent, but to flush with the same oil that the component requires under normal use.
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