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Old 08-06-2011, 05:13 AM   #1
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Transmission fluild flush or not? 2002 Wrangler Sahara A/T 109K

I've never flushed my transmission fluid. I took it to a local shop and they recommended that I keep the current fluid in and let the transmission go eventually since I never changed it and waited too long. Any opinions?

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Old 08-06-2011, 05:20 AM   #2
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Don't do not definitely don't flush all that sludge is what keeps it working I'm serious tranny in my silverado was slipping against all opinions I complete flushed 3 weeks later I spent 2300 on a new tranny installed... Just my 2 cents

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Old 08-06-2011, 06:03 AM   #3
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If it smells ok and isn't burnt you should be good. On the other hand if you drain the transmission, change the filter the old school way without using a flush machine you would be fine as well.
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Old 08-06-2011, 01:59 PM   #4
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I don't believe in the machine flush system.Chance of getting other vehicles crap if maintained wrong.At 100 i always changed.Never thought it would do wrong especially when you see the amount of crap your removing.Does your engine run on the crap removed from your filter? Don't think it's good for tranny either.
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Old 08-06-2011, 02:27 PM   #5
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Do not do it!!!! It's a money ploy, just a drain and fill, fill with scyromax 16.99 a quart but worth it. 172,000 miles on my TJ started to slip outta second I did this now she purrs.
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Old 08-06-2011, 04:15 PM   #6
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Quote:
Originally Posted by hartattack
Do not do it!!!! It's a money ploy, just a drain and fill, fill with scyromax 16.99 a quart but worth it. 172,000 miles on my TJ started to slip outta second I did this now she purrs.
Just wondering, why do you think it's a gimmick?
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Old 08-07-2011, 01:59 AM   #7
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So you can go somewhere to get service and tell them just to drain and change filter vs. flush? I don't know much about cars, it's an automatic though.
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Old 08-07-2011, 02:56 AM   #8
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Yea they drop the pan to change the filter and replace the fluid that was drained from the pan a flush works fluid thru the tranny and lines to clean lines/ components and replaces the fluid throughout the whole system
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Old 08-07-2011, 07:52 PM   #9
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Just drop the tranny pan and replace the fluid that comes out along with the filter and you will be good. You will not get all the fluid, but about half of it. As long as the fluid is not burnt you will be fine doing this.
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Old 08-07-2011, 08:44 PM   #10
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I personally think it's an old wive's tale that says not to change ATF for whatever reason. If it were my TJ I'd have it flushed and filled with fresh ATF+4. Be careful with what ATF they use, only ATF+3 and ATF+4 is compatible.
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Old 08-07-2011, 09:38 PM   #11
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I personally think it's an old wive's tale that says not to change ATF for whatever reason. If it were my TJ I'd have it flushed and filled with fresh ATF+4. Be careful with what ATF they use, only ATF+3 and ATF+4 is compatible.
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Old 08-07-2011, 09:53 PM   #12
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Pan drop and filter change should be fine. That replaces about 50% of your fluid. If you want to change your fluid more often after that, put a drain plug in your pan or buy a new pan with a drain plug in it. Here's an example of a drain plug kit: Amazon.com: B&M 80250 Automatic Transmission Universal Drain Plug Kit: Automotive

As for power flushes, one local transmission here refuses to do them nor do you see a flush mentioned in your Owner Manual. I wouldn't go there. In fact Chrysler has a Bulletin out on flushes as follows:
Quote:
TSB 26-001-09


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
Having said that, complete fluid replacement, sometimes referred to as a "flush", is a method where the transmission pump pumps out fluid while new fluid is added. That' safe but the filter should be changed as well.

Again, a pan drop and filter change should work well for your high mileage transmission. I would't pay any extra $ for anything else. That will cost around $100.00 at a transmission shop. Make sure they use a proper ATF+4 fluid, not some unlicensed universal type. I am assuming your Owner Manual specifies ATF+3 or ATF+4. ATF+4 is the replacement for ATF+3 which is no longer made to Chrysler specs.
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Old 08-08-2011, 07:29 AM   #13
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Two things in the world scare me to death: septic systems and transmissions. I never mess with either one! Though anecdotal, every time I've ever had any service either than to drain and replace filyer/refill, I've had trouble down the road.

I also suggest MOPAR P4007886AB deep transmission pan (may or may not be the correct version for your Heep). It comes with a drain plug. I installed one a few months ago.
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Old 08-08-2011, 09:58 AM   #14
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Quote:
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Just wondering, why do you think it's a gimmick?
I didnt see that yours was an Auto..but having said this, I went to Amco to get mine changed and read a few threads about this very thing on here..told the guy I just wanted a drain and fill with sycromax and no flush..he asked why no flush? I said I read about it on here and he said I quote "those damn fourms are gonna run me outtta a job.ha ha"
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Old 08-08-2011, 02:49 PM   #15
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I just checked my Auto Transmission fluid..it doesn't smell burnt, however, gray in color. Should I still drain/replace filter?
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Old 08-08-2011, 02:53 PM   #16
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My local transmission specialist charged me 80 bucks for a pan drop and filter change. took them a little over an hour. when i asked for a tranny service he automatically talked about a pan drop and filter change so i didnt bother to ask about a flush. it was cool because he personally owned a TJ also. my dealer i bought it from said not to have a flush done, but they wanted 150 bucks for the pan drop so i didn't go to them for it.
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Old 08-08-2011, 08:22 PM   #17
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Originally Posted by rcorbe1 View Post
I just checked my Auto Transmission fluid..it doesn't smell burnt, however, gray in color. Should I still drain/replace filter?
Gray? Wow, that's not right, ATF should be bright red. I'd change it and the filter asap.
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Old 08-08-2011, 08:33 PM   #18
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Most mechanics including myself dont recomend flushing high mileage automatics. Just simply drop pan and change filter. Dirt and grime in a automatic actualy helps out as theinternals wear down that dirt and grime fills the voids. Once flushed out thats all gone and the trans sooner or later starts to slip and burn up.
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Old 08-08-2011, 08:44 PM   #19
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Most mechanics including myself dont recomend flushing high mileage automatics. Just simply drop pan and change filter. Dirt and grime in a automatic actualy helps out as theinternals wear down that dirt and grime fills the voids.
All that is, as I mentioned above, is what I believe to be nothing more than an old wive's tale. Sure some mechanics might believe that but not all...
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Old 08-08-2011, 08:47 PM   #20
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All that is, as I mentioned above, is what I believe to be nothing more than an old wive's tale. Sure some mechanics might believe that but not all...
Just callin what i have seen.
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Old 08-09-2011, 04:39 AM   #21
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so you thinking just change the filter? Even if the trans fluid is gray. thanks for everyone's response..i really appreciate it!
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Old 08-09-2011, 10:49 AM   #22
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so you thinking just change the filter? Even if the trans fluid is gray.
My above recommendation was to change both the ATF and the filter, not just the filter.
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Old 08-09-2011, 10:54 AM   #23
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Mine was grey when I dropped out failed tranny, I could scoop it up with a shovel, the friction plates fell apart, stopped up filter, and starved pump, and I was wishing that "whining" sound was a supercharger
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Old 08-09-2011, 01:07 PM   #24
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I'd bet that grey look was all the fine particulate matter in it. Tiny pieces of internal parts ground up fine. And/or water in it.

Put some in a glass jar and let it settle - may even take a few days, the junk eventually goes to the bottom, water to the top.

If water, check the integrity of the coolant lines to and in the radiator. (Unless you know you did it in a water crossing.)

If just tiny particles, it's from clutches and bearings wearing.

A magnet dipped in it will catch the steel particles, but most of it is non ferrous clutch materiel.

That junk gets caught in the torque converter and other places - it forms something similar to cement - a hard solid difficult to scrape out. But power flushing could break loose a chunk - that chunk can get into places that will disable the trans.

That's why it's best to just replace the filter and the fluid - it's safe.

I've seen trans's with several hundred thousand miles with lots of the "cement" - but it stayed in place and never caused any problems.
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Old 08-10-2011, 04:40 AM   #25
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Thanks all!

I'm going with the drain/filter change. What is a good price to pay? Around or under 100.00?
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Old 08-10-2011, 05:07 AM   #26
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Do it yourself. I'm delving into mine this weekend.
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Old 08-10-2011, 05:21 AM   #27
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I'm going with the drain/filter change. What is a good price to pay? Around or under 100.00?
With the help of this forum, you can cut about $25 off of that
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Old 08-11-2011, 06:10 AM   #28
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Old 08-12-2011, 04:20 AM   #29
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hey

thanks all!

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