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Unread 06-27-2013, 09:49 AM   #1
UNCjeepWK2
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Transmission servicing

I got my '11 WK2 V8 4x4 serviced yesterday for 48k-mile servicing which was just oil change and tires rotated. My service guy said it was due for transmission service (fluid flushed and replaced w filter).

I was always under the impression tranny fluid doesn't need to be flushed and changed until 100k miles or so. Interested in other opinions... I of course told him to check it out and if it needed it, do it, but they said it was ok. The manual only says change it at 64k IF being used as fleet/taxi vehicle. What have you all done?

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Unread 06-27-2013, 03:56 PM   #2
NCJeepGC
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Follow what the manual says. Sounds like he is just trying to get you to spend some money. Unless your using it for constant heavy towing, Mopar ATF-4 can last 100,000 miles easy.

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Last edited by NCJeepGC; 06-28-2013 at 06:01 AM..
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Unread 06-27-2013, 06:18 PM   #3
Dave2002ti
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I wouldn't let it go 100K

I would change it around 50 to 60K miles. Cheap insurance for a couple hundred bucks.
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Unread 06-27-2013, 07:09 PM   #4
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Whenever an interval asks for 100k, I halve it. All other intervals I go by the book. Even 100k plugs, I replace them at 50k. Waste of money? Perhaps, but I sleep better at night.
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Unread 06-27-2013, 07:15 PM   #5
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Quote:
Originally Posted by Butterjeep
Whenever an interval asks for 100k, I halve it. All other intervals I go by the book. Even 100k plugs, I replace them at 50k. Waste of money? Perhaps, but I sleep better at night.
Your money. Whatever makes you sleep better at night :-)
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Unread 06-27-2013, 07:29 PM   #6
NCJeepGC
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Originally Posted by Butterjeep View Post
Whenever an interval asks for 100k, I halve it. All other intervals I go by the book. Even 100k plugs, I replace them at 50k. Waste of money? Perhaps, but I sleep better at night.
As I can understand your logic, there's a huge price difference between changing plugs and servicing your transmission. I usually replace fluids/filters ahead of schedule. I'm not telling him to not do the service, I'm just saying its probably fine to wait. Its my research/experience that ATF-4 is a pretty sophisticated fluid that is capable of 100k miles under normal conditions. Do I think servicing a modern transmission at 48k is a waste of money, absolutely.

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Unread 06-27-2013, 09:16 PM   #7
tjkj2002
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Originally Posted by NCJeepGC View Post
As I can understand your logic, there's a huge price difference between changing plugs and servicing your transmission. I usually replace fluids/filters ahead of schedule. I'm not telling him to not do the service, I'm just saying its probably fine to wait. Its my research/experience that ATF-4 is a pretty sophisticated fluid that is capable of 100k miles under normal conditions. Do I think servicing a modern transmission at 48k is a waste of money, absolutely.

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Funny my Jeep states every 30k for severe and 60k for normal and it uses ATF+4 also.Eitherway I flush it every 15k and change both filters every 30k.
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Unread 06-28-2013, 05:59 AM   #8
NCJeepGC
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Funny my Jeep states every 30k for severe and 60k for normal and it uses ATF+4 also.Eitherway I flush it every 15k and change both filters every 30k.
Assuming your vehicle is what is in your signature, In 2002, transmissions were filled with ATF-3, and with ATF-3, service intervals were shorter, thus why your manual states that. ATF-3 was discontinued sometime around 2005, and ATF-4 replaced it. Upside was a fluid that could maintain its properties alot longer. WK2's service interval with ATF-4 is 64k for severe conditions, and 120k for normal conditions.
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Unread 06-28-2013, 07:39 AM   #9
loveracing1988
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Originally Posted by tjkj2002 View Post

Funny my Jeep states every 30k for severe and 60k for normal and it uses ATF+4 also.Eitherway I flush it every 15k and change both filters every 30k.
Aren't you also the one who works at a shop and you change your own oil every 3000 miles with Mobil one pretty much for free?
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Unread 06-28-2013, 06:31 PM   #10
tjkj2002
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Assuming your vehicle is what is in your signature, In 2002, transmissions were filled with ATF-3, and with ATF-3, service intervals were shorter, thus why your manual states that. ATF-3 was discontinued sometime around 2005, and ATF-4 replaced it. Upside was a fluid that could maintain its properties alot longer. WK2's service interval with ATF-4 is 64k for severe conditions, and 120k for normal conditions.
Nope filled with ATF+4,states it right there on the dipstick and in the owners manual.ATF+3 was phased out in '98 I believe because no 45RFE/545RFE trans ever came or was spec'd for ATF+3 and I have the 45RFE trans.
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Unread 06-28-2013, 06:32 PM   #11
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Aren't you also the one who works at a shop and you change your own oil every 3000 miles with Mobil one pretty much for free?
It's every 1500 miles and yep it costs me about $10 to change my oil using Mobil 1 EP and Mobil 1 EP filter,and yes I do pay full retail and tax on both the oil and filter.
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Unread 06-28-2013, 10:39 PM   #12
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It's every 1500 miles and yep it costs me about $10 to change my oil using Mobil 1 EP and Mobil 1 EP filter,and yes I do pay full retail and tax on both the oil and filter.
You are also the guy who would change his oil everyday if the evic told you to do so.

Every 1500 miles?? Why?? Flush every 15,000 why? How does the fluid look after such a short interval?
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Unread 06-29-2013, 02:47 AM   #13
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You are also the guy who would change his oil everyday if the evic told you to do so.

Every 1500 miles?? Why?? Flush every 15,000 why? How does the fluid look after such a short interval?
Some folks just feel better about their rides when it gets fresh fluids often. Like some folks clean the car every day, polish and wax every weekend. And if you like doing it, why not? I dunno if anyone wore out the threads on the oil plug.
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Unread 06-29-2013, 05:38 AM   #14
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Lol my dad used to joke that I'd wear out the hood latch on my TJ when I was a kid. I'd pop the hood and just stare at the motor. I need to be better about washing my vehicles, haven't washed my JK in months and haven't washed my wk2 since I bought it!
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Unread 06-29-2013, 08:56 PM   #15
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This is the 5-0speed transmission, right? This is basically the Mercedes-Benz 722.6 transmission. These were shipped with a high-quality synthetic oil and were originally claimed to be "sealed for life". The problem was, they started seeing failures around 150K miles, so fluid and filter changes were recommended at 70K miles. Most of these lacked a torque converter drain, so the dropping the pan would only yield about 4 (less than half the capacity), but that was better than nothing. Later, the 722.9 7-speed transmissions came out, and they carry a one-time 39K fluid/filter change service interval (but with the torque converter drain you can get 9 quarts out of it). Having serviced several of these transmissions and seen the poor quality of fluids, I would strongly recommend regular fluid and filter changes every 35K miles. I don't know if the Chrysler version have torque converter drains or not, but if they do, they should be drained. As for the fluid, the original fluid was MB Spec 236.12, but that was discontinued and now they have 236.14 spec, which is the Mopar ATF+4. Another good fluid that meets this spec and is widely available is Shell ATF-134.
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