I need to change my trany fluid . Has any one had it done at jiffy lube they have this system that does a full flush with out changing the filter or removing the pan . its some type of suction thing they use .

 

My sister had this done with her oil on a Nissan pickup. After an hour and a half the mechanic came out and asked her if the truck always made noise and was hard to start. Come to find out the tip of the device came off in the engine. New motor was eventually put in the truck. On the way home that motor started having issues as well. She got a new truck out of the deal.

I would avoid this procedure.

 

Even with new fluid you would want a new filter or what's the point.

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Avoid Transmission Vacuum extraction(aka suck and fill) and review other options. If your going to get a transmission flush find a shop the uses the T-TECH machine. This system taps into the cooler lines and allows the Jeep's transmission pump to exchange the fluid. Once exchanged the T-Tech will extract the new fluid from the drain pan to allow the tech to drop the pan and change the filter. Once changed the machine will put the fluid back into the pan.

http://www.cloreautomotive.com/site_...pk=10&br_pk=35

 

Just do it yourself,

http://project-jk.com/jeep-jk-write-...ission-service

The hardest part is taking everything off, the tranny pan is a pain to get off because the exhaust is in the way but we did it. Save that labor cost for mods! Good luck

 

Agreed... just do it yourself.

It doesn't take that long, there are just two bolts that are tricky to get to thanks to the exhaust cross member. And it makes a god d*mn mess too, but I did it, and I didn't have to worry about some 16 year old at quickie-lube screwing up my jeep.

 

I have a manual JK but I also have an older auto liberty with the 42RLE. I'm assuming it's still true with the JK's 42RLE, but you must use ATF+4 trans fluid. Back on the liberty forums I ready A LOT of posts of people getting their trans fluid changed at the jiffy lube type places and they would put in Dextron not knowing they had to use ATF+4. It ended up causing those people some problems.

Just do it yourself. It's not that tough and allows you to spend some quality time with your JK. It can be a messy job though so be sure to get the biggest drain pan you can find.

 

I definetely agree with the sentiments here which are to do it yourself, and avoid "flushing" procedures. I'm a bit radical and haven't dropped a pan in the last 15 years on any of my vehicles (some used for heavy towing). See the following:
http://home.comcast.net/~kingslea1/Jeep/Tranny.pdf

 

That is a great link with good info. All true except one point:

"The procedure is then repeated twice more over the following two weeks. This exchanges all of the fluid since the 42RLE transmission holds 17.6 pints (under 9 quarts of fluid)."

three changes will NOT replace all of the fluid because of mixing. The second drain takes out some of the new fluid that replaced old fluid from the first drain, etc. etc.

Serial dilutions have to account for mixing. By definition you can't get to 100%.
It takes in the neighborhood of 7 drain and fills to get around 95% or better replacement of the original fluid.

sorry can't find my original posts with the actual math.....

 

Yes, you are right. I added an update some time ago, but is not the one posted. The math goes something like ...

Slightly over 3 quarts of fluid can be removed by pumping fluid out via the transmission dipstick fill port (as compared to 4 quarts drained through pan removal) if the vehicle has sat at least 24 hours prior to the procedure. Fluid is vacuumed using the LiquiVac pump. The amount of fluid removed is measured and the transmission is refilled with an identical amount*. The procedure is then repeated twice more over the following two weeks. This exchanges 70%=(1-(2/3)^3)*100 of the fluid since the 42RLE transmission holds 17.6 pints (under 9 quarts of fluid).