06 owners, please read! TCM info needed.

MTB_TDI · **Posted:** Mon Mar 17, 2008 9:07 am

I am on a quest to find a TCM that has not been "upgraded" with the new shift points. For those that haven't had the "upgrade," what are the last letters on your TCM? Mine says AI and I know that it is the post F37. What was the earliest version of the TCM and the last version before the F31/F37 fiasco? I am looking for the desirable letters on the sticker.

I am looking into a source that is confident that his suppliers have the right labels on the TCMs and will look for one (or more) for me. I will let you all know if it works for me. I just need the above info so that I can give it to him so he can look for it. If this works out for me I will let everyone know and give the contact info out.
Thanks.

geojunkie · **Joined:** Wed Nov 09, 2005 9:11 am **Posts:** 7

I have an 06 built in 8/05 that I am pretty darn sure has never been flashed with F31 or F37. I am the original owner. The only work done in regards to recalls was in spring 06 when they replaced a filter in the tranny that supposedly contributed to a slow engagement of reverse if the vehicle had been sitting a while. I never had that problem before this was done, nor did I after. And later the ball joints and heater fan recalls were done. That is it. I have made it very clear that they DO NOT FLASH anytime I took it in, even long before F37 was out, because so many of you were complaining about flashes doing more harm than good from the get go. I don't specifically know what evil F37 does, but it sounds like shifts occur at higher rpms, and I sure have never noticed any change like that. I have learned exactly how to drive this transmission over the years and am very in tune with the shift points and esp the TC lockup points, which I work to achieve. I try to keep the rpms at just above the lockup dropout point of 1700 rpm whenever feasible for good fuel economy.

So could my ECU/TCM software be downloaded and used to upload for any of you unhappy campers? I have never had ANY problems with this Jeep, other than the rear main seal drips, but I don't know it is worth the greater risk of the harm some inexperienced tech might do trying to fix it. so it still drips. My EGR has worked fine, even after long periods of ORM inactivity. The transmission has always been fine and after 41k miles performs just the same as it has always. I give it an Italian tune at least once a tank. I did replace the muffler with a piece of 2.5" pipe lately... coasts better and mileage up maybe 1-2 mpg, esp in city driving. I average 28 mpg by the onboard calc with 60/40 highway/city. At 60 mph I can get well over 30 mpg if no headwind, and up to 35 mpg with a tailwind. My city runs about 25 mpg if I baby it. I guess you can tell I really like this Jeep, lots of character. I just wish it looked like a JK unlimited.

gmctd · **Posted:** Mon Mar 17, 2008 10:45 pm

If it's a Bosch 776 you'll want a AB or BB - it's a 775 you'll want an AA - if it's a 773, send it to Inmotion, as that's the Euro version for the 6-sp manual shift...........................

MTB_TDI · **Posted:** Tue Mar 18, 2008 9:27 am

geojunkie,
What does your sticker say on your TCM and ECM? That will help me out as well.

gmctd wrote:

If it's a Bosch 776 you'll want a AB or BB - it's a 775 you'll want an AA - if it's a 773, send it to Inmotion, as that's the Euro version for the 6-sp manual shift...........................

gmtcd,
Was that meant for me? If it was that is what I needed.

gmctd · **Posted:** Tue Mar 18, 2008 9:47 am

Those are ECM numbers\revisions: 776 is 2.8L 2\4wd, 775 is 2.5L auto, 773 is manual transmission right-hand drive and Euro - TCM would be 737AB (from 05) and possibly as late as 737AF would still be pre F31\37 - if F31 is for the scantool upgrade, you'll need that level to monitor it with ScanguageII\equiv

geojunkie · **Joined:** Wed Nov 09, 2005 9:11 am **Posts:** 7

My TCM is 737AG and my ECU is 776AD. I am going to take it in for routine service soon, could I have the dealer read my current software rev levels for each without risk of getting an unwanted download?

gmctd · **Posted:** Tue Mar 18, 2008 10:22 am

That's a possibility - others have refused reflash and succeeded, but I don't remember if anyone has requested a live revision check

FYI - I read on good authority that Euro doesn't get all the revisional upgrades, and the 6-sp manual doesn't require TMR or EMCC, so the Inmotion tune would have F31 but never the F37-associated de-tune - another good possibility for upgrading without downgrading

Joe Romas · **Posted:** Tue Mar 18, 2008 10:47 am

geojunkie wrote:

My TCM is 737AG and my ECU is 776AD. I am going to take it in for routine service soon, could I have the dealer read my current software rev levels for each without risk of getting an unwanted download?

Another option is getting a vag-com owner to read it for you :lol:

Over on the TDI club ( www.tdiclub.com ) there used to be a list of VC owners who were available. I lost my user name and password so I can't help you there.

If anyone is in or around columbus, Ohio I could read it for you or let you read it for yourself :lol:

gmctd · **Posted:** Tue Mar 18, 2008 10:55 am

Here's how Alldata stacks the TSB's up - Automotive Recall and Technical Service Bulletin Titles for 2006 Jeep Truck Liberty 4WD L4-2.8L DSL Turbo VIN 5.
* indicates software-related
** idicates major software-related

TSB Number & Issue Date TSB Title
G03 JUN 07 Recall - Blower Motor Replacement
F23 SEP 06 Recall - Front Lower Ball Joint Replacement
F11 MAR 06 Recall - R/H Front Door Latch Plate Reinforcement
E14 NOV 05 Recall - A/T Parking Pawl Cup Plug Defect

TSB Number & Issue Date TSB Title
**F31 AUG 06 Recall - Transmission Control Module Programming

TSB Number & Issue Date TSB Title
**F37 DEC 06 Recall - Torque Converter & Reprogram ECM/TCM
**F21 MAY 06 Campaign - Body Control Module Reprogramming
E16 OCT 05 Campaign - A/T 545RFE Cooler Return Filter Replacement

TSB Number & Issue Date TSB Title
21-014-07 OCT 07 A/T - ATF + 4 Fluid Usage
23-038-07 AUG 07 Body - Front/Rear Windows Stick/Bind/Chatter
23-036-07 AUG 07 Interior - Low Gloss Interior Trim Care Information
02-035-07 AUG 07 Lighting - Information On Exterior Lamp Lens Fogging
08-016-07 JUN 07 Lighting - Instrument Panel Indicator Lamps Flicker
08-001-07B MAY 07 Air Bag System - Passenger Air Bag Deactivation
26-003-07 MAR 07 Maintenance - Fluid Flushing Recommendations
21-003-07 FEB 07 A/T - Diagnostic Teardown Procedures
23-003-07 JAN 07 Keyless Entry - Replacement Transmitter Key Cautions
23-054-06 DEC 06 Body - Sunroof Leaks Water When Parked on a Slope
08-046-06 OCT 06 Audio System - Cell Phone Induced Clicking From Speakers
23-047-06 OCT 06 Body - Windshield Crack Diagnosis
*22-006-06 OCT 06 Tire Pressure Monitor - System Information
08-041-06 SEP 06 Lighting - Daytme Running Lamps Inoperative
05-004-06A SEP 06 Brakes - Rear Brake Moan Upon Light Application
**08-030-06A AUG 06 Engine Control - PCM Initialization Procedure
24-006-06 AUG 06 A/C - Musty Odors When Hot/Humid
**18-001-06A JUL 06 Engine Controls - Flash Reprogramming Abort Recovery
*08-017-06 APR 06 StarSCAN(R) - Vehicle Scan Report Availability
21-010-06 APR 06 A/T - ATF+4 Fluid Usage/Applications
*21-007-06 APR 06 A/T - Delayed Shift Engagement/Related DTC's Set
23-015-06 MAR 06 Interior - White Water Stain Mark On Cloth Seats
23-014-06 MAR 06 Wipers/Washers - Wipers Smear or Streak Winshield
*14-001-06 JAN 06 Fuel System - MIL ON/DTC P0457 Set
23-003-06 JAN 06 Body - Paint Etching Repair
*18-038-05A DEC 05 Engine Controls - High Altitude Driveability/DTC P0504
22-001-05 DEC 05 Wheels - Caring for Chrome Wheels
19-008-05A NOV 05 Steering - Revised Power Steering Bleeding
*08-013-05A OCT 05 Cell Phone - UConnect(R) Hands Free Phone Inoperative
21-015-05 SEP 05 A/T - 45RFE/545RFE Delayed Engagement After Filter R&R
08-041-05 AUG 05 Battery - Spiral Cell Battery Service
21-013-05 AUG 05 M/T - NSG370 6 Speed, Vent Restriction Prevention
23-035-05 JUL 05 Body - Circular/Ring Marks on Glass
21-012-05 JUL 05 A/T - 42RLE Variable Line Pressure Transmission
08-024-05 MAY 05 Electrical - Radio Equipment Installation Recom

MTB_TDI · **Posted:** Tue Mar 18, 2008 11:00 am

gmctd wrote:

Those are ECM numbers\revisions: 776 is 2.8L 2\4wd, 775 is 2.5L auto, 773 is manual transmission right-hand drive and Euro - TCM would be 737AB (from 05) and possibly as late as 737AF would still be pre F31\37 - if F31 is for the scantool upgrade, you'll need that level to monitor it with ScanguageII\equiv

So, if I am looking for an 06 ECM that hasn't had the F37 upgrade, I would be looking for a TCM with the numbering of 737AC through or 737AG?

What about a euro TCM? I have a contact in Spain that could get one for me.

gmctd · **Posted:** Tue Mar 18, 2008 11:19 am

That Euro source may be a good thing - if you want to run a dedicated stand-alone TCM, you would need a manual trans ECM which wouldn't go into limp mode, because it wouldn't be looking for input from the Jeep TCM - only problems would be they also have the 2.5CRD as well as the early 2.8CRD with vacuum EGR, no AFC\TV, and wastegated turbo - that could also be a good thing, except at federally-mandated vehicle inspection time

MTB_TDI · **Posted:** Tue Mar 18, 2008 11:23 am

gmctd wrote:

that could also be a good thing, except at federally-mandated vehicle inspection time

I don't have emissions testing where I live. Not even on gassers. Can you help me find out a part number and I'll give it a try?

06 owners, please read! TCM info needed.

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