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PostPosted: Thu Jul 02, 2009 1:51 pm 
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PostPosted: Thu Jul 02, 2009 4:22 pm 
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If I'm getting the GDE tune, does it matter if the dealer flashes it beforehand? I just checked with my dealer, they said they will do the TC/F37 recall no charge, even though I'm 2nd owner and it's out of warranty. So, I think I'll have that done (to get rid of the TC with the plastic parts), then send the ECU to GDE for tuning. Does that sound like a plan?

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PostPosted: Thu Jul 02, 2009 5:13 pm 
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Tell them to do everything except the TCM reflash. That is important.

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PostPosted: Thu Jul 02, 2009 5:25 pm 
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You might want to buy a spare TCM and swap it in before a dealer F37 visit, just in case they ignore your request. Once you have it done, there isn't any known way back.

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PostPosted: Thu Jul 02, 2009 5:33 pm 
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Good luck getting that information past the service writer to the actual tech who will play with the scanner. I've tried asking for specific things, and what is actually printed out on the service form is ALL that the tech will ever see or know.

I went in with a problem with my remote starter, told the guy specifically that the car would start and immediately shut down again, and that meant that most likely the remote starter's SKREEM antenna loop was damaged or came loose... He listened, we discussed exactly what needed to be done most likely (replace just that loop) and printed out on the form just one line: "Cust states remote starter does not function"

The idiots charged the warranty with replacing the entire remote starter, gave it back to me and said it was done... And IN THEIR PARKING LOT I tried to start it... It started up, immediately died, and then set off the alarm.

So they took it back in... Replaced the BCM... And it STILL didn't work. FINALLY, they looked under the steering column... And discovered that the wire for the antenna loop was pinched and had gotten damaged, pulling the self-adhesive loop off in the process. They ordered yet another complete remote starter (for reasons I don't know, the rest of the parts that weren't used had vanished) and after 3 attempts it was finally working... With the original diagnosis that I brought to the service guy correct. He even said that I had been right from the beginning and he didn't know why they did all this other crap.

He never made the connection that putting only 7 words onto the service form is what cost Mopar (and my warranty) over $3000 in parts and who knows how much tech labor time.


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PostPosted: Thu Jul 02, 2009 5:34 pm 
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ABSOLUTELY do what Ranger1 suggests. Once you lose that programming, it is GONE for good.

I still have that extra TCM that I'm willing to swap with yours... :D


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 Post subject: DO NOT DO F37!!!
PostPosted: Thu Jul 02, 2009 5:47 pm 
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I AM HOLLERING IN ALL CAPS!! DO NOT DO F37!!

F37 is only the reflash to "de-tune", (read: neuter) not a recall on the Torque Converter. You can get the GDE tune, and then if the TC detonates and you have to bring it to the dealer for warranty work (if you don't want to just do the Suncoast TC) and they reflash the GDE tune out, GDE (IIRC they state this early in this LOONG thread, you will have to ask them to be sure) will reflash it for you at no charge. They may do the F37 at the dealer if you do have to have the warranty work done, but ENJOY IT WHILE YOU CAN. Seriously consider purchasing or scavenging another TCM in the meantime to install prior to taking it to the dealer to protect your non-F37 TCM.

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 Post subject:
PostPosted: Thu Jul 02, 2009 5:48 pm 
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You guys are confusing the $%#@ out of me! Are you saying that GDE does not reprogram the ECU, and take what's in there out, even the F37? That's not what i read elsewhere. In fact, GDE says they will reprogram it for free if the dealer puts the F37 back in it for some reason. Please clarify.

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PostPosted: Thu Jul 02, 2009 5:55 pm 
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Duke: There are more than 3 computers in the CRD, unlike in other vehicles:
The ABS computer
The BCM or Body Control Module
The TCM or Transmission Control Module
The ECM or Engine Control Module.

GDE has a tune (software) for the ECM ONLY.

If you take your Jeep to the dealer, they will update BOTH the TCM and the ECM. THIS IS NOT WHAT YOU WANT TO HAVE HAPPEN EVER!!!!!!!!!!!!!!!!!!!
Most vehicles do not have a separate transmission controller. We do, because of how the truck was built. The TCM CANNOT BE REPROGRAMMED by any aftermarket tuners. This may change someday, but is highly unlikely. So if it gets de-tuned by Chrysler, IT IS FOREVER.

The F37 is a BAD IDEA. That is what all of us are trying to un-do to our trucks with the GDE tune, but since GDE can't un-screw the mess that was done to the TCM... Our trucks will never reach the full potential of MPG that they could. Mopar designed a CRAP component to put between a strong engine and a strong transmission... And rather than openly fix their bad design, they chose to de-tune the engine even further than they did to satisfy the idiot grannies at the EPA.

The result is a diesel that drives like any gas powered chrysler - it feels slow and underpowered and gets crap MPG. Don't do it. If you are hell-bent on doing this anyway, PLEASE sell me your TCM, I will PAY you AND provide an exact duplicate TCM that Mopar can neuter to their heart's content.


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PostPosted: Thu Jul 02, 2009 6:17 pm 
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I understand now, thanks. No one was mentioning the TCU in this thread so I assumed they were talking about the ECU as this was a GDE discussion. I wasn't aware the dealer reprogramed both ECU and TCU with the F37. In that case, I'll do nothing and wait for the stock convertor to die. Then, I will use my extended warranty and go to my local mechanic and have him put in an aftermarket one. Will stay clear of the dealer.

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PostPosted: Thu Jul 02, 2009 6:55 pm 
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duke wrote:
I understand now, thanks. No one was mentioning the TCU in this thread so I assumed they were talking about the ECU as this was a GDE discussion. I wasn't aware the dealer reprogramed both ECU and TCU with the F37. In that case, I'll do nothing and wait for the stock convertor to die. Then, I will use my extended warranty and go to my local mechanic and have him put in an aftermarket one. Will stay clear of the dealer.


Get the GDE tune and it will drvie like it should have from the beginning and get the mileage your looking for :lol: then you'll have the best of both :D

Joe

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PostPosted: Thu Jul 02, 2009 8:21 pm 
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duke wrote:
I understand now, thanks. No one was mentioning the TCU in this thread so I assumed they were talking about the ECU as this was a GDE discussion. I wasn't aware the dealer reprogramed both ECU and TCU with the F37. In that case, I'll do nothing and wait for the stock convertor to die. Then, I will use my extended warranty and go to my local mechanic and have him put in an aftermarket one. Will stay clear of the dealer.


I wish I had done that, but I tried to save some money and took it in for the F37 to get the new transmission pump. I now wish I had not. One of the things that they *MAY* fix during F37 (up to them) is replacing your transmission pump with a new one with a redesigned seal. You want the new pump, so plan on replacing that when you do the torque converter.


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PostPosted: Fri Jul 03, 2009 9:00 pm 
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Well, mine got back today, so I am putting it in tomorrow (after I clean the filthy engine).


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PostPosted: Fri Jul 03, 2009 9:38 pm 
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Cleaning the filthy engine... Oh that will be fun. When I do the swap from the 215k mile old V8 with the rebuilt CRD in my Grand Cherokee... 12 years of accumulated sludge will be scraped off every surface in that bay. Anyone have any suggestions of the best chemical warfare for the job?


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PostPosted: Sat Jul 04, 2009 11:21 am 
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geordi wrote:
Cleaning the filthy engine... Oh that will be fun. When I do the swap from the 215k mile old V8 with the rebuilt CRD in my Grand Cherokee... 12 years of accumulated sludge will be scraped off every surface in that bay. Anyone have any suggestions of the best chemical warfare for the job?
Biodiesel, hands down.

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PostPosted: Sat Jul 04, 2009 12:27 pm 
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geordi wrote:
Cleaning the filthy engine... Oh that will be fun. When I do the swap from the 215k mile old V8 with the rebuilt CRD in my Grand Cherokee... 12 years of accumulated sludge will be scraped off every surface in that bay. Anyone have any suggestions of the best chemical warfare for the job?


full strength simple green

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 Post subject:
PostPosted: Sat Jul 04, 2009 9:07 pm 
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UFO wrote:
geordi wrote:
Cleaning the filthy engine... Oh that will be fun. When I do the swap from the 215k mile old V8 with the rebuilt CRD in my Grand Cherokee... 12 years of accumulated sludge will be scraped off every surface in that bay. Anyone have any suggestions of the best chemical warfare for the job?
Biodiesel, hands down.


That stuff is an amazing cleaner. Spilled some from my fuel can onto the catch pan full of diesel oil/grease dirt and nastiness from the last oil change-- it cut clean through it and dissolved it. Smelled nice too.

I have cleaned places in the engine bay I did not know existed. And under the body and frame. Driving offroad in a caravan gets everything filthy. Well, my brake from the heat is over. I have to put the engine bay back together and then I will see how she goes...


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 Post subject:
PostPosted: Sat Jul 04, 2009 11:00 pm 
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UFO wrote:
geordi wrote:
Cleaning the filthy engine... Oh that will be fun. When I do the swap from the 215k mile old V8 with the rebuilt CRD in my Grand Cherokee... 12 years of accumulated sludge will be scraped off every surface in that bay. Anyone have any suggestions of the best chemical warfare for the job?
Biodiesel, hands down.


Back in the day, those who had a parts cleaning vat filled it with mineral spirits to cut oil, grease, and stuff. The alternative that is available, and works really well, are esters and probably very similar to that of biodiesel.


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 Post subject:
PostPosted: Sun Jul 05, 2009 5:54 pm 
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Well, I have been driving it around. Much better performance. I never had the Inmotion tune or any other chip, so I can't compare its performance to anything except stock.


It is 108 out right now, and the motor is usually a bit more sluggish when it that hot, but it is not so much now. The tip in is better-- like everyone says. It has more power all around and it is especially noticeable at low highway cruise speeds where the motor used to struggle a bit when going up a grade (That spot where the gearing is just not in the engines power band).

Last night I horsed around with it and it really lit the tires up from a stop (brake first, rev and let go). At first I was really disappointed because I saw the RPMS shoot up and I wasn't going anywhere. Turns out it ripped the wheels loose so fast I barely heard the tires chirp over the radio-- they were just spinning. I was clued in when the ABS sound was heard going off and on like mad. There is a long alternating double black line on the asphalt now as that darn traction control had a fit and a half (even though I pushed the ESP button) trying to keep both rear wheels going anywhere near the same speed. I find that pretty impressive as I have 245/75's and it did not burn out much with the the larger tires before the GDE tune (and after the F37).

One nice thing is that the EGR temps are lower in normal cruise by (going from memory) about 70+ degrees. The EGT's also drop much faster after a load than before. Before the tune, idling with the AC on after a drive on a hot day (110+) took 30-90 seconds for the temp to drop below 500, today it was closer to 15 secs. At 65MPH cruise, the temps today were around 660-680, before they were around 730-750.


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 Post subject: GDE intown mpg figures
PostPosted: Sun Jul 05, 2009 6:13 pm 
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I couldn't wait any longer for city results on my GDE tune. Perviously my short trip all intown driving has been 17-19 in the warm months consistantly :? After 208 miles the suspense was killing me. The results are in, drum roll please, 23.386 mpg :D That's about 5 mpg better city driving. AND as many have said before I have verified for myself using my tom-tom gps and with stock tires the odometer is 10% low. So my actuall intown short trip driving is 25.7 mpg. Not a TDI but definetly better then my XJ's have gotten. Actually about half :oops: Hopefully next month we'll be taking a 1500 mile trip towing our camper. My overall driving experience has been fantastic.
This ain't my dad's Oldsmobile :D

bd

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