Green Diesel Engineering - KJ ECU tuner (NEW)

UFO · **Posted:** Thu Jul 02, 2009 1:51 pm

^^^^ You lucky dog!

duke · **Posted:** Thu Jul 02, 2009 4:22 pm

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?

chrispitude · **Posted:** Thu Jul 02, 2009 5:13 pm

Tell them to do everything except the TCM reflash. That is important.

- Chris

Ranger1 · **Joined:** Mon Oct 17, 2005 7:40 pm **Posts:** 1137

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.

geordi · **Posted:** Thu Jul 02, 2009 5:33 pm

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.

geordi · **Posted:** Thu Jul 02, 2009 5:34 pm

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...

linewarbr · **Posted:** Thu Jul 02, 2009 5:47 pm

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.

duke · **Posted:** Thu Jul 02, 2009 5:48 pm

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.

geordi · **Posted:** Thu Jul 02, 2009 5:55 pm

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.

duke · **Posted:** Thu Jul 02, 2009 6:17 pm

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.

Joe Romas · **Posted:** Thu Jul 02, 2009 6:55 pm

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

Joe

Pablo · **Joined:** Thu Feb 02, 2006 10:06 pm **Posts:** 1201

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.

Pablo · **Joined:** Thu Feb 02, 2006 10:06 pm **Posts:** 1201

Well, mine got back today, so I am putting it in tomorrow (after I clean the filthy engine).

geordi · **Posted:** Fri Jul 03, 2009 9:38 pm