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Transmission flush or fluid exchange and filter change?


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BrettTampa
New User

Jan 3, 2017, 10:11 AM

Post #1 of 4 (487 views)
  post locked   Transmission flush or fluid exchange and filter change?  

I bought a used certified 2012 jeep grand cherokee, V6 in Dec 2015. I'm assuming that the transmission fuids were checked prior to sale. It had 75K miles at time of purchase and in the last 13 months I have put on 45K miles (120K)

Although I have had NO issues, and the vehicle is in excellent shape, I haven't done any transmission, differential or transfer case maintenance yet, but I know it's time to address it. The owners manual is vague, and references use under the"normal driving conditions"... I have been using the vehicle everyday for Lyft (150-175 miles daily) so certainly not "normal".

Questions:

1. At this point in the vehicles life, would you recommend a complete transmission system flush or just a transmission fluid exchange and a new filter? (Heard a lot of pros and cons to flushing - loosening debris, creating clogging, the reverse pressure process loosening seals, etc. vs having a complete cleaning for sustaining better transmission life)

2. In terms of order of importance for all the drive train components, can one area be addressed first or should everything be done at the same time?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 3, 2017, 10:26 AM

Post #2 of 4 (479 views)
  post locked   Re: Transmission flush or fluid exchange and filter change?  


Quote
1. At this point in the vehicles life, would you recommend a complete transmission system flush or just a transmission fluid exchange and a new filter? (Heard a lot of pros and cons to flushing - loosening debris, creating clogging, the reverse pressure process loosening seals, etc. vs having a complete cleaning for sustaining better transmission life)


I'd have to say that entire statement is bogus. There is no actual flushing. There is no reverse pressure. The machine merely allows the transmission's own pump to pump fluid out and it replaces it with the exact quantity that is removed. It isn't flushing that loosens debris, it's the detergent in the new fluid that does.

Under the severe service table the factory recommends replacing it at 64K



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Jan 3, 2017, 12:48 PM)


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Jan 3, 2017, 10:45 AM

Post #3 of 4 (468 views)
  post locked   Re: Transmission flush or fluid exchange and filter change?  

I'm sure that Gary will be on here to respond to this.


The flushing part is a misnomer. The machine doesn't actually power flush or reverse flush the transmission hydraulic system. It actually uses the transmission own cooler pressure to exchange the fluid in the transmission. When you start adding chemicals to the exchange process is when you run into issues. Dropping the pan, changing the filter, inspecting the pan, and then refilling is all it should need in my opinion. Severe service has you changing the fluid and filter every 64,000 mi. Normal service is 120,000 mi. Takes ATF+4.

If the transmission filter and fluid is serviced as per manufacture, fluid exchange shouldn't be necessary.

There is also a TSB from Chrysler on this subject:


Quote
NUMBER: 26-004-12

GROUP: Miscellaneous

DATE: June 06, 2012

SUBJECT:
Fluid Flushing Requirements

MODELS:

2011 - 2012 (D2) Ram Truck (3500 Pick Up)

2011 - 2012 (DD) Ram Truck (3500 Chassis Cab)

2011 - 2012 (DJ) Ram Truck (2500 Pick Up)

2011 - 2012 (DP) Ram Truck (4500 / 5500 Chassis Cab)

2011 - 2012 (DS) Ram Truck (1500)

2012 (FF) Fiat 500

2011 - 2012 (JC) Journey

2011 - 2012 (JK) Wrangler

2011 - 2012 (JS) Avenger/200

2011 - 2012 (KK) Liberty

2011 (KA) Nitro

2011 - 2012 (LC) Challenger

2011 - 2012 (LD) Charger

2011 - 2012 (LX) 300

2011 - 2012 (MK) Compass/Patriot

2011 (ND) Dakota

2013 (PF)Dart

2011 - 2012 (PM) Caliber

2011 - 2012 (RT) Town & Country/Grand Caravan

2011 - 2012 (WD) Durango

2011 - 2012 (WK) Grand Cherokee

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 exceptions to this requirement are published in the vehicle maintenance schedules, e.g. engine coolant.

Exceptions to this recommendation include only those instances where a malfunction 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 team PSE 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

Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.






Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jan 3, 2017, 10:45 AM)


gsferraro
Enthusiast

Jan 3, 2017, 6:56 PM

Post #4 of 4 (441 views)
  post locked   Re: Transmission flush or fluid exchange and filter change?  

Hello, In my shop we do a service, drop the pan change the filter, i do not own one of those fluid exchangers.
Do you know what trans you have? that year and engine size could be either a 5 speed or an 8 speed? If the car is in the U.S you can post your vin and i can look it up for you. Gary






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