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transmission questions, fluid change, flush or not
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=85857		 Page 1 of 1
Author:  foxhunter [ Tue Dec 27, 2016 1:19 pm ]
Post subject:  transmission questions, fluid change, flush or not
first off I am not having any problems with my trans. it is in a 2006 mfg 3/2006. Chrysler insist there was not a f37 recall on my transmission by vin#. I have 65000 miles on it and the service manual calls for a fluid and filter change at 65000 miles . being the vehicle is 10 years old what are the risk of doing the flush? I know Chrysler trans don't like not having the filters changed.
does anyone know where the mfg date is on the transmission? in the tsb section on transmissions the tsb for the torque converter recall was up to 9/2005. went to recheck the date and could not locate the tsb.
your thoughts
Update.
called my dealer and they said it has the 1.68037142aa torque converter in it, which is the euro.
Author:  olypopper [ Tue Dec 27, 2016 1:53 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
"I know Chrysler trans don't like not having the filters changed."

Not sure where you are getting your info.....I've been driving Chryslers and Fords my entire life and Ford transmissions (old E4OD) are the only ones I've ever heard of this anomaly on. People that use non Chrysler filters are probably the ones having problems as the spin-on element inside the pan can fit poorly or the threads can shear if a no-name filter is used. This will cause all sorts of mayhem.

Drop the pan, change both filters and refill with ATF+4..........enjoy!
Author:  papaindigo [ Tue Dec 27, 2016 3:53 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
Sigh. There was no F-37 on the transmission; F-37 in its final form addressed ECU tune; TCM shift point programming; and inspection of torque converter. There was TSB 21-007-06 APR 06 for the transmission that addressed delayed engagement after being parked for a while due to defective filter drain back valve. Email me if you want a copy of the TSB; build date location info is below. Use brand name (Mopar, WIX, NAPA filters and ATF+4 for service and you will be ok). Other comments:
1. flush is not necessary. I have no opinion or knowledge about tranny flushes but some LOST members, not many, have reported post flush problems.
2. yes that's the Euro PN and if the Euro is really installed in an 06 KJ CRD then someone installed it after the vehicle was sold. If DCJ has that part listed they should be able to tell you date/mileage of install which would also indicate last tranny service date/mileage.


The transmission build date can be determined by inspection of the 20 digit transmission identification number (DDDYxxxxxPpartnumber). The transmission identification number is stamped on the left side (driver side) of the transmission oil pan flange; below the stick on label. The first four (4) digits of the transmission identification number are the transmission build date, in Julian date format. An example of a transmission identification number would be : 101510492P52119684AA. The first three digits (101) of the identification number equal the day of the year, in this case 101 equals April 11. The fourth digit (5) of the identification number equals the calendar year, in this case 5 equals 2005. So 1015 equals April 11, 2005.
Author:  foxhunter [ Tue Dec 27, 2016 8:29 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
sometimes I feel like Alice in wonderland and the crd is the rabbit hole. all I know is I called my dealer and they said that was the torque converter my jeep came with according to the serial number, (rabbit hole)

ok, so just drop the pan and drain fluid, replace both filters with good name brand filters, good to know, problems after the flush was my concern.

i'll check the build date on the tranny tomorrow.
were the later 06 already detuned to the f37 specs? Chrysler say's there never was a f37 recall on my vehicle, I called 3 times just to make sure, (rabbit hole)

my tranny shifts into overdrive at 62 mph.
Author:  olypopper [ Tue Dec 27, 2016 9:57 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
Keep that CRD in the rabbit hole and never let the dealer touch it! :mrgreen:
Author:  tjkj2002 [ Tue Dec 27, 2016 10:14 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
foxhunter wrote:
sometimes I feel like Alice in wonderland and the crd is the rabbit hole. all I know is I called my dealer and they said that was the torque converter my jeep came with according to the serial number, (rabbit hole)

ok, so just drop the pan and drain fluid, replace both filters with good name brand filters, good to know, problems after the flush was my concern.

i'll check the build date on the tranny tomorrow.
were the later 06 already detuned to the f37 specs? Chrysler say's there never was a f37 recall on my vehicle, I called 3 times just to make sure, (rabbit hole)

my tranny shifts into of at 62 mph.

Get the filter kit from the dealership only,they have the updated spin on filter which the aftermarket does not have.


The issues with people have had after having a flush was because they waited to long or there was already a issue with the trans.The flush itself can not hurt the trans,the owner neglect is what is that cause.

If your at 60k or so a flush will not hurt your trans unless you already have a underlying issue or problem already.On a side note never allow them to use any chemical cleaners with the flush,just the fluid swap is all that is needed.

I flush my trans every 15k and change both filters every 30k and never had a issue,have almost 100k on it and I'm hard on my KJ,much harder then any of you are on your CRD's and weigh 2000lbs more then your CRD's.
Author:  papaindigo [ Tue Dec 27, 2016 10:28 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
At some point in the production of the 06 KJ CRD the ECU detune and TCM shift point changes were made at the factory. After that point in time, which I presume was late in the 06 model build run, vehicles in that VIN range did not need the F-37 recall as it had been done at the factory. A final shift point of 62mph is proof positive that your TCM has the post F-37 shift points.

I'll defer to others but as far as I know the Euro torque convertor was introduced in the 07 model year and never was installed at the factory in any 06 KJ CRD. Not saying that such installation is impossible but... My experience with DCJ build sheets is that they are not always to be relied on for what's actually installed on a specific vehicle.

I still am of the opinion that any brand name tranny filters are fine not just Mopar. My 05 and my son's 06 are running fine with WIX filters.
Author:  foxhunter [ Wed Dec 28, 2016 1:28 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
Got a clarification from the dealer this morning, parts manager said that number is what is pulled up by my vin. it doesn't mean it is the number that it left the factory with, just what she would replace it with. 459.00 for the euro tc and it is available.

does anyone know what the part number for the pump valve upgrade?
Author:  papaindigo [ Wed Dec 28, 2016 1:33 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
I show 68009879AB for upgraded pump and have a note that if you want a pump replacement that's all that is available as 1st gen pump and gasket are out of stock.

If they show the Euro as what to use for replacement it's likely because the 2nd gen 05/06 torque converter is no longer available. Odd that they show the Euro PN as I was under the impression that the Euro was now only available with a R (rebuilt) prefix.
Author:  foxhunter [ Wed Dec 28, 2016 1:44 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
the replacement tc from jeep has a rl prefix instead of the 1.68 prefix.

do you replace the valve or the whole pump? pump cost half what the tc cost?
Author:  peteyz24 [ Wed Dec 28, 2016 2:38 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
papaindigo wrote:
....A final shift point of 62mph is proof positive that your TCM has the post F-37 shift points.....


I have been reading this on here since I joined. The funny thing is I have an '05 and according to the recall info on the jeep website it has had f37 performed, but the final shift is at 57mph.
Author:  joelukex4 [ Wed Dec 28, 2016 4:01 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
This is what ceearedeedriver wrote about the F37 & F31 recalls.

This was actually addressed with two recalls:

F31 AUG 06 - Changes the shift points. Some vehicles came from the factory with the new shift points already installed e.g. my Jeep was manufactured in Apr 06 and had them from the factory. The behavior of the new shift points is as you describe above for F37.

F37 DEC 06 - De-tunes the engine. This recall also upgraded the TC for those early models that required it. An upgraded TC already came stock early in the 2006 MY onward. No vehicles came from the factory with F37 already installed though I'm sure there may have been some on the dealers lots that were downgraded before delivery.

Since the two recalls are so close together I'm sure there are plenty of vehicles that skipped F31 and went straight on to F37 which would also include the new shift points but because this was done as two separate recalls there will also be vehicles out there that were manufactured with the upgraded TC and had the new shift points installed at the factory or through F31 but never went on to be de-tuned by F37.


This makes sense to me. My early 05 CRD had the transmission rebuilt under warranty in '07 by the previous owner. The torque converter was replaced and ECU reflashed in 2008. When I bought it I assumed it was detuned but it still shifted at 57mph. No F31.
Author:  papaindigo [ Wed Dec 28, 2016 4:20 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
foxhunter - if the pump needs "work" you replace it all. If your pump is ok, mine was but that was at 45k miles when SunCoast did my torque converter, you can install the transgo kit pump part.

peteyz24 - a "complete" F-37 included a detune of the ECU to reduce torque and hp and a retune of the TCM to raise shift points. The only way to be absolutely sure the F-37 detune was applied to your ECU is for someone to access the ECU and check the software version. If your final shift, flatish road and light acceleration, is at 62mph you have the F-37 TCM tune but if it's at 57mph you either have the pre-F-37 TCM tune or a GDE TCM tune. My 05 and a few others had F-37 done but the tech "missed" doing the TCM retune.

I cannot comment on F-31 vs. F-37. All I can say is if your 05/06 KJ CRD had "all" the ECU/TCM/torque converter recalls completely done then the details of my comments to peteyz24 apply. Doesn't matter if the work was done after production at the dealer or during production. That said it's likely some late production, don't ask me to define late, 06 models had it done during production. As far as I know based on my time on LOST there were only 2 torque converters used during production on 05/06 KJ CRDs with the automatic - #1 very early 05 with a plastic or Bakelite part that self-destructed very early and #2 a "better" TC that lacked the defective part. #2 was an ok more or less torque converter but it still was prone to shudder hence the ECU/TCM de/retunes to reduce stress on the #2 torque converter. What DCJ should have done is bit the bullet and recall all automatic 05/06 KJ CRDs and install a good as opposed to ok torque converter. In the 07 model year they did install a good torque converter which we refer to as the Euro torque converter but too late for the USA market.
Author:  joelukex4 [ Wed Dec 28, 2016 4:44 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
Either way your engine was detuned. It you have a GDE tune the point is mute.

I have the pre F37 shift points and like the 57mph shift. I can cruise all day at 60 mph at 1700 rpm's.
Author:  foxhunter [ Wed Dec 28, 2016 5:45 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
pump is ok, tc is ok, just looking to the future. read in another thread there was a better (upgrade) pressure valve for the pump. that was where my question was directed. just trying to figure which gde tune to get. don't want the hot tune if it is the week tc.
Author:  foxhunter [ Wed Dec 28, 2016 6:36 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
got the part # off the transmission and googled it, all the search results are in german and none in English.
part # p52119462ag rfe, no results with rfe on the number.
Author:  flash7210 [ Wed Dec 28, 2016 7:01 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
foxhunter wrote:
got the part # off the transmission and googled it, all the search results are in german and none in English.
part # p52119462ag rfe, no results with rfe on the number.

Part number doesnt really matter.
Its a 545rfe transmission. Used in many Dodge, Jeep, and Chrysler vehicles.
All 545rfe transmissions are the same.
Author:  jws84_02 [ Wed Dec 28, 2016 7:33 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
foxhunter wrote:
pump is ok, tc is ok, just looking to the future. read in another thread there was a better (upgrade) pressure valve for the pump. that was where my question was directed. just trying to figure which gde tune to get. don't want the hot tune if it is the week tc.



I might be in st. Charles, MO sometime soon. I know it's still a little ways from you. But if you would be interested in meeting me there I could load yeti's stage 2 tune on just to see if the tc handles it and then you can make your decision. Stage 2 is about same level as the gde hot tune
Author:  foxhunter [ Wed Dec 28, 2016 8:28 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
I appreciate the offer but without knowing which tc, the safe bet is the gde eco tune. not looking to break anything, that gets expensive in a hurry. i'm to old to be going 100 mph with my hair on fire, I do tow a 17 ft Boston whaler about 45 miles one way to go fishing.
Author:  papaindigo [ Wed Dec 28, 2016 10:42 pm ]
Post subject:  Re: transmission questions, fluid change, flush or not
GDE EcoTune does fine on my son's 06 with stock TC. Has toward fully loaded 5X8 uHaul from Tempe, Az to Tally, FL and then from Tally to Kearney, NE with only 2 very brief shudder episodes of like 2 seconds or less, just backed off throttle and shudder quit. With EcoTune OEM tc will be fine if you don't push it hard.
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