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Waltherone
Dodge Dakota
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11/19/2003
19:33:59
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 Subject: RE: 4.7 Disabled torque limiter?
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I was told by KRC that they can't raise shift points with my upcoming computer flash because of the TCM controlling the tranny...and I thought (always have thought) TCM was the tranny control module.
But who cares. What does the torque management DO? Everyone is so hyped about what it does when disabled, but I want to know what it does to the truck. Wanna make sure it's totally safe over long periods..
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Waltherone
Dodge Dakota
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11/19/2003
20:23:38
| RE: 4.7 Disabled torque limiter?
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Actually, just looked it up, it is the Tranmission Control Module.
BOOYAH! :P
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Waltherone
Dodge Dakota
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11/19/2003
20:32:35
| RE: 4.7 Disabled torque limiter?
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And one last thing. A long time ago someone posted about unplugging the line pressure sensor and it's making the shifts more firm. What you guys are talking about is totally different...has anyone tried both?
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GraphiteDak
GenIII
11/19/2003
22:31:02
| RE: 4.7 Disabled torque limiter?
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I wasn;t thinking when I spelled out what the TCM was LOL. I had the schematic for it right in front of me too! It is the Tranny COmtrol Module.
So far I didn;t get it to work on my 2003 Dak, but excellent on my 1998 Cirrus.
I only messed with it one time on my Dak. Playing with the signal I got more than a nice chirp frojm 1st to 2nd, it barked the ever living sh*t out of the tires.
Then an immediate trouble code and into limp mode it goes. My 2003 doesn't seem to have a seperate TCM from the PCM from what I have read. But I don't have a schematic for my Dak yet so I can't tell.
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steve sharp
Dodge Dakota
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11/20/2003
00:06:03
|  RE: 4.7 Disabled torque limiter?
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by the way if anyone has the optimizer ignition and the Kenne Bell supercharger with the factory pcm flashed this mod will not work as this section of the tcm is by-passed. believe me i tried it today and there is absolutly no difference and even checked for voltage to the wire itself. nada. so if its got a KB blower dont go to the trouble. Not like you would need it anyway.I dont.
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Rob C
Dodge Dakota
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11/20/2003
03:13:52
|  RE: 4.7 Disabled torque limiter?
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Midnightmagic, Are you saying with the wire open (cut) it shifts early and gives you bad mileage dispite shifting firmer with more power but with the wire closed (uncut) you get softer, later shifts and better gas mileage? Also, with the wire open, are you shifting firmer with more power or firmer because they're quicker shifts? Finally, what year is your truck?
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know-it-all
Dodge Dakota
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11/20/2003
16:27:43
| RE: 4.7 Disabled torque limiter?
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Steve not so sharp, know what TCM stands for know ?
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steve sharp
Dodge Dakota
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11/20/2003
21:13:16
| RE: 4.7 Disabled torque limiter?
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tranny control module and cutting this wire with the Kenne Bell set up does not add any more performance to the vehicle. That was what I was trying to make clear. After re reading it I can understand how a few people would be confused by what I wrote. It also did not change the shift points. So if there is some other way you enhanced your performance with the same set up I have I would love to here it. ps. its not know its now. smart huh? know-it-all
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GraphiteDak
GenIII
11/20/2003
22:37:09
| RE: 4.7 Disabled torque limiter?
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On our car it didn't shift earlier. It still shifted on it's own at 6500 RPM's. But I noticed that when I let off the gas it was sounding different like it was holding in diff gears, converter lockup, etc than with the circuit closed. I haven't driven it since that one night I did it. And I installed a switch anyway so my woman doesn't have to worry about it. It's "on demand" that way.
Anyone who does this better install a switch. It's worth the $10 for all materials.
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kRaSh
Dodge Dakota
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11/21/2003
00:09:55
| RE: 4.7 Disabled torque limiter?
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Does this work on a 99 5.2L???
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midnightmagic
GenIII
11/21/2003
10:15:44
| RE: 4.7 Disabled torque limiter?
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update: i put the pin back in and reset the puter! filled the tank up and i have gone 33 miles and the gas needle hasn't moved, i got in it bout 3 times yesterday. my conclusion. ROB C. this is for you: since we have ELECTRONIC LOCKUP TORQUE CONVERTERS i feel this has something to do with it! with the pin out or as you say wire cut, it disables the the electronic side of it turning it into a normal torque converter. i havent had a chance to dyno it(snowing out here) but i will almost bet that you will put down more power to the wheels with it "cut" than it would with it not cut or pin in. YES it shifted harder because more power was being put down, i could turn the corner at about 30 in 3rd and floor it, it would down shift to 2nd and just light up both tires, also rolling at about 15mph step in it and it would down shift to 1st and spin then catch traction then hit second hard and leave a nice second set of lines. downside it locks out your dual second gear ratios, you will only have the 1.54 ratio(no big deal) and for some reason with overdrive on and to the floor it shifted into 4th at 70 instead of 95. also more power is being used to move the truck than with it on due to the electronic side of the torque multiplication factor, therefore thats where i feel the decrease in mileage came from. solution: put it on a toggle switch, that way if you race from a stop turn it off, you will get your hard 1-2 shift then toggle it back on and press on. or however you feel it works to your advantage. hopefully this clears some things up. i could only imagine having a blower or nitrous and having this thing hit 2nd like it does..hold on dorthy cause kansas is going bye bye!
You gotta ask yourself one question...That Thing Got A HEMI???
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Rob C
Dodge Dakota
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11/21/2003
19:43:16
|  RE: 4.7 Disabled torque limiter?
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OK, thanks for the update midnightmagic. I'm definitely looking for a good rocker or toggle switch to install and run it to the TCM harness. Is this forum great or what!?
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GraphiteDak
GenIII
11/22/2003
01:12:52
| RE: 4.7 Disabled torque limiter?
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I installed a ROCKER switch when I did our car. I KNEW I'd need to close the circuit because this is my old lady's daily driver, NOT mine. I just HAD to do it to something.
Anyway. What I did to our car does NOT simply kill our lock up. It plain and simply STOPS the PCM from backing off the torque (no more ignition retard or fuel cut back, etc) during shifts. It also seemed to shift at normal shift points and downshifted normal, etc. The only thing is when completely off the gas it sounded slightly different. I'll have to drive it again to find out more. But it's NOT just a lock up kill. It still locked up on our car. And it sure as hell shifted so much harder the front end lunges up during shifts and without the funky exhaust sound when the timing was retarded!
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Kowalski
Dodge Dakota
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11/22/2003
07:46:30
| RE: 4.7 Disabled torque limiter?
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GraphiteDak is right - this has nothing to do with the lockup.
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GraphiteDak
GenIII
11/22/2003
19:49:23
| RE: 4.7 Disabled torque limiter?
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I posted this on the Sebring site and it took a day for them to look it up and find out what color their wires were before someone got it done. My wire was yellow and green. On the Sebring it's Orange and black. Some there also figured iit to be a lockup kill as well. Now I'm getting good feedback over there. It shifts WAY better now with it switched off.
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Allan
Dodge Dakota
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11/23/2003
10:22:12
| RE: 4.7 Disabled torque limiter?
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If this wire is only a signal to the PCM to cut timing for the change then how can it affect the torque convertor lockup. If the torque con. lockup was disabled then when you accelerate you would see the tach. rev up before the truck starts to speed up. I did this mod in my 2002 QC 4.7 and I've been getting 14.7 mpg. If it dosen't hurt the tranny driving normally and you get the kick when you get into it, then why not cut it and leave out the switch.I haven't noticed any change when driving normally. But can this wire instruct the PCM to advance the timing(if the instruction is too retard it when WOT changes) at any other time?
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GraphiteDak
GenIII
11/23/2003
12:47:52
| RE: 4.7 Disabled torque limiter?
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I watched the signals. It seems to be just on or off. It shouldn't have anything to do with advancing the timing during WOT. It simply just tells the PCM it is shifting gears so the PCM reduces performance via timing retard and I heard it also reduces some fuel with it which makes sense to me.
It shouldn't have anything to do with the lockup of the torque converter at all.
I drove our car again this morning to get a recording of the exhaust during shifts. So I recorded it accelerate thru 1st and shift into 2nd. Stopped. Flipped the switch to OFF (open) and did it again. On the second sound clip you can hear that it no longer makes the funky exhaust sound during the shift like it did on the first clip.
Next time I'll bring a rider with me to run the camera so they can hold the camera to the window or soemthing to get a better recording of the exhaust sound. You can hear it on these, but you also hear the Gerbils scream on this little 24 Valve V6.
GO to the bottom of this page here : http://www.paysonarizona.net/MyProjects/ProjectCirrus/ProjectCirrus_06_TorqueManagementMod.htm
I'm currently trying to find some schematics for my 2003 Dakota so I can see what I can do with it. So far no luck.
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midnightmagic
GenIII
11/24/2003
10:12:44
| RE: 4.7 Disabled torque limiter?
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thats good idea this week sometime i will get my cousin to ride with me and record what the dak sounds like from the 1-2 shift with it coneected and disconected.. one quest. how do i compress and where do i load the vid at???
You gotta ask yourself one question...That Thing Got A HEMI???
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Lurkin
Dodge Dakota
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11/24/2003
18:30:08
| RE: 4.7 Disabled torque limiter?
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Cut the wire on my 92 QC, auto, AWD today. I though I would see a pretty significant change,,, I didn't. I believe that the shifts were better, but not alot. My shift points are the same and the torque converter lockup is functioning as it always has. Maybe the AWD softens up the power delivery, or it has different programming. I'm not sure. I do know that for me a switch isn't necessary, because the change is not that big. I might wire it back up and see if it's noticable going back.
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BluDak01
Dodge Dakota
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11/24/2003
18:30:59
| RE: 4.7 Disabled torque limiter?
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I cut the wire today for the TCM the yellow w/ green stripe, the trans seems to shift a little firmer but no neck snapping or tire spins , just a little firmer, is there anything I can do to make it chirp!
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