I have the GDE ECO tune and the GDE TCM.

Traffic here moves kinda slow. Just slower drivers overall, not due to traffic.

The GDE TCM shifts into 5th at 58 mph, versus 62 mph, and holds it down to 50-51 mph.
Stock TCM shifts into 5th at 62, and drops it down to 4th again at 58.

Traffic here flows at 55-58 mph, so it works great for me.

I used to tow 5K lb (boat & trailer rig), and the TCM did fine with it.

I would encourage you to get BOTH modules, though. They work well together.

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"Gunner": 2007 Jeep Grand Cherokee Limited CRD GDE ECO tune Bought 01Apr16 (71K miles)


If you're in New England and need your KJ TB done, PM me.

Retired:
Tractor: Dark Khaki '06 CRD Sport, GDE ECO & Trans Tunes, 2.5" lift + 245/75r16. - Sold 27Apr16
Ghost: Silver '06 KJ CRD Limited, bunch of goodies done - Sold 18Apr16

Have the TCM tune, it likes to down shift and upshift when you are pulling grades with low RPMs caused by the Hot Tune, but I would not go back to stock. It does much better pulling a light utility trailer over 2000 lbs. most likely it is staying in a lower gear.

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

Have the TCM tune, it likes to down shift and upshift when you are pulling grades with low RPMs caused by the Hot Tune, but I would not go back to stock. It does much better pulling a light utility trailer over 2000 lbs. most likely it is staying in a lower gear.

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

I run the towing tune along with the full torque eco. I don't tow at all, but I live in a very hilly area. I really like the shift points on the thing.

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2005 Liberty CRD Limited
DIY Garage Remanufactured Engine with GDE Full Torque Eco Tune from mile zero.
ARP Studs
Cummins Lift Pump
Transgo HD2 Reprogramming Kit
DIY Rebuilt Tranny Pump
Suncoast Torque Converter
2nd Generation Fuel Head
Sears P1 Battery
Hot Diesel Solutions Thermostat

I bought a second TCM and sent it to GDE for re-tune. I had problems with it. It would up shift at low speeds and lug the engine. I was going to look into having GDE do a custom tune, but before I could ship the module back to GDE it was stolen when someone broken to my Jeep. I currently have the original TCM, the GDE hot tune, suncoast TC. Overall, I'm very pleased with this combination. I recommend against the GDE TCM tune and the transgo shift kit.

John Burford

That is the same problem I have on county roads with 45 MPH speed limits, on the highway it is fine. Maybe GDE never tested in those kind of conditions?

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

I thought that was the whole point of the GDE TCM Eco tune.
Allowing the transmission to shift into 4th and 5th gears at lower speeds.

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U.S. Army Retired

It is not the up-shifting that bothers me, it is the constant up and down shifting you get on a hilly 45 MPH road.

It will lug a little, down shift for a short while, then up shift, repeatedly depending on the hilliness.

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

What if you turned the OD off, would it still behave that way?

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U.S. Army Retired

I called Keith at GDE (great guy) and had a custom one done I split the difference and had it set at 60-62 range..... ITS FANTASTIC.
and i use it to tow my 2 ATVs all the time. When it hits 60-62 roughly it kicks into 5th and stays there as long as i'm over 50 mph

Also a bonus while driving along the straight country roads here in MN i'll let it hit 5th gear and drop it down to the low 50's for speed and get well over 30 mpg all day long.
and i took it out to lake city Colorado this past summer.... Worked great out there too. It just chugged up the mountains like they weren't there and didn't do all the up down shifting the tyranny usually does.

get one you wont regret it!

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05 Jeep Liberty CRD

2" OME lift
30x10.5-15 Goodyear Wrangler MT/R tires
Jeepin by Al front upper control arms
Green Diesel Engineering ‘Hot’ tune
Suncoast torque converter
and so much more

Sounds like what I am running.

Mine did the same thing. Sent it back and it was mis programmed. After he fixed it, free of charge, it was great. Towed about 4K miles this summer.

Sent from my Samsung Note 4 using Tapatalk.

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2006 Sport, GDE FT Eco Tune, Custom Trans Tune
2015 Ram 1500 Big Horn EcoDiesel, GDE Hot Tune

I think it helps?

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

I tow about 2500lbs pretty often. Would the tow tune be good for me? The stock trans behaves pretty well so far

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05' Silver CRD Limited, GDE ECO Tune, WEEKS Stage 1, Elephant Hose Mod, Interior LEDs, Pioneer System, 190k miles

Work Done: New A/C System Complete, New Front Drive Shaft, ETECNO 7V Glow Plugs, New Rear Upper Control Arm
Future Work: WEEKS Stage 2, New TC, GDE Tow, Tires,

As for the Dodge Ram TCM. Warp2Diesel has a non crd TCM, stock gas Grand Cherokee I think, that he has "trained" to work in his CRD.
Try a search.

I used to tow our 3200# 17' Casita with our CRD a with a Euro TC and the GDE Full Torque tune.
I have two TCM's an original "pre f37" for normal driving and the "Post F37" TCM that I find works well for towing.
Even with the Euro TC using the pre f37 tcm for towing I have gotten shudder once. (forgot to swap to the F37 before that trip)
The original pre f37 TCM will hold 5th gear down to 54 MPG (around 1600 rpms) and applying just a little pressure on the skinny pedal, not enough to down shift I found out what real shudder is

From my experience and what I've read this transmission regardless of tune can not utilize 4th gear enough that is really needed for towing.
It seems to be 5th or 3rd. It's very difficult to keep it in 4th when towing

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

The TCM tune works great on the highway for economy and low RPM engine operation. Also good around town, and saves fuel on coasts with the tranny locked and injectors turned off.

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

I think we were talking about whether or not the Ram TCM would accept GDE's CRD tune being flashed to it, not whether it works in the Jeep. I have a Ram TCM and was considering sending it to GDE to have it flashed with the Eco Tune but when I asked Keith about it, it was not clear if it would work.

I've use the Ram TCM and it just wasnt worth the hassle. It's around town manners were fine and I liked that you could pick and choose your gear easier, but I had numerous instances where I need to really get on the gas and it got me in trouble. I know people talking about how you can't have a digital foot to get it to work well but there are situations that cannot be avoided. The on-ramp I used to get on every day was an extremely tight right hand loop that you could only comfortably do 25 mph on. You then had to merge onto a 60mph 4 lane highway and had less than .25 miles before your lane became and exit only. When you are trying to merge onto the highway and not get crushed by the 18 wheeler barreling down on you and the TCM downshifts to many gears sending the engine to 5k rpm, its not good. Having to know exactly what the tipping point would be to get the most power without it overrunning the engine was a PITA.

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2006 CRD - GTB2056 turbo by Dieselguy86, Eco Trans Tune, Lift Pump, Week's, HDS Tstat, Racor Filter, ARP's, OME 790's+Top Plate, JBA 2.5", JBA UCA, Moab's+265/75R16, ARB Bull Bar, 4.10's, TrueTracs

2500 is nothing. But I like how the tune behaves. Much better shift points for a diesel.

Sent from my Samsung Note 4 using Tapatalk.

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2006 Sport, GDE FT Eco Tune, Custom Trans Tune
2015 Ram 1500 Big Horn EcoDiesel, GDE Hot Tune

Let me make sure I understand this thread correctly. If I chose to I could go purchase a used Ram TCM from wrecking yard or whatever, plug it in place of the post F37 and it would work just fine?

It "works", but you must be very light with the throttle. It upshifts earlier under light load and gets the rpms down, however, it will also downshift at the drop of a hat. It thinks its still attached to a 5.7l so it assumes its OK to downshift so far as to spin the engine beyond 4000 rpm since the hemi has a higher redline. I don't think this will damage the engine, but the ECU cuts fueling above 4000 so u end up just sitting there with the engine at 4500 rpm not accelerating. U gotta let up to get it to upshift.

You can make it work, but u need to be careful. If you were driving country roads with very little traffic it would work great. City situations or things like short highway enterence ramps can show its flaws.

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2006 CRD - GTB2056 turbo by Dieselguy86, Eco Trans Tune, Lift Pump, Week's, HDS Tstat, Racor Filter, ARP's, OME 790's+Top Plate, JBA 2.5", JBA UCA, Moab's+265/75R16, ARB Bull Bar, 4.10's, TrueTracs

Also gde is supposedly testing a ram tcm with their jeep. They said it accepted their eco tune but they had not installed it in a jeep yet. That was two weeks ago but they have not updated me on the outcome.

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2006 CRD - GTB2056 turbo by Dieselguy86, Eco Trans Tune, Lift Pump, Week's, HDS Tstat, Racor Filter, ARP's, OME 790's+Top Plate, JBA 2.5", JBA UCA, Moab's+265/75R16, ARB Bull Bar, 4.10's, TrueTracs