Re: 46RE standalone controller (I think I'll design one)
[Re: hooziewhatsit]
#1867579
07/10/15 04:08 AM
07/10/15 04:08 AM
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hooziewhatsit
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Huzzah! With creative use of three different screwdrivers, I got the plug off. After some troubleshooting, I discovered that the shifter has to be in Drive before I can control the governor pressure solenoid. Otherwise the sensor always reads 0 psi. Once I moved the shifter however, it appears that I have full control over the solenoid. The highest voltage I got from the gov. pressure sensor was only ~2.6v (~70psi), and that was with either zero current commanded, or with the power supply line to the solenoid disconnected.
If you ever find yourself in a fair fight, your tactics suck.
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Re: 46RE standalone controller (I think I'll design one)
[Re: hooziewhatsit]
#1867827
07/10/15 06:06 PM
07/10/15 06:06 PM
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My documentation shows a different resistance value for the temperature sensor between the different generations. I have a plan to calibrate the computer during initial set up.
I'm using a special driver IC that will monitor and adjust the current through the governor solenoid automatically. So I can tell it to drive any value up to 1A, and it will do it.
I'll have to put the jeep on jackstands to test the VSS, so I'll monitor the gov. pressure to see if it rises once it's 'moving' and line pressure increases.
Do you recall (or can you say) how often the stock vehicles sampled and updated the governor pressure?
If you ever find yourself in a fair fight, your tactics suck.
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Re: 46RE standalone controller (I think I'll design one)
[Re: hooziewhatsit]
#1873341
07/19/15 05:05 AM
07/19/15 05:05 AM
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hooziewhatsit
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Got some more testing done. With a very rudimentary feedback system, I'm moving 10psi in ~1 second. (while running at whatever pressure, I can tell it to target a pressure that's 10psi higher or lower, and it takes ~1 second to reach it) Looking at the numbers, I think I can easily cut that adjustment time in half. At least when the fluid is nice and warm . This week I'm planning on driving the jeep for the first time with the controller. I don't have the logic implemented for OD/LU yet, but I have enough for basic speed->governor pressure control.
If you ever find yourself in a fair fight, your tactics suck.
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Re: 46RE standalone controller (I think I'll design one)
[Re: DeMopuar]
#1874585
07/20/15 09:16 PM
07/20/15 09:16 PM
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hooziewhatsit
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Just got back from the first drive test. It was... uneventful. At light throttle it hit 3rd at about 30mph. 3/4 throttle it hit third at about 50mph. It had no trouble keeping the governor pressure at the current MPH. Right now I'm doing just a 1:1 psi:mph ratio, so the higher shift was all due from the throttle lever. Overall, I'm pleased. It won't be much more work to add a look up table to generate a lower/higher pressure:speed calculation to raise the shift points as desired. It also shouldn't take too long to add the logic for OD & LU. Hoozie,
Just curious how confident you feel that you'll have a great working controller? I'm getting close to pulling the trigger on a transmission, and I have a couple of choices, RH or RE.
I'm pretty confident that once it's ready, the controller will be quite robust. I have a list of all the stock error conditions and codes. I can duplicate the test for the relevant ones, and in the event of an issue, I can show the stock error code. If you (or anyone else) has a running & driving RE and wants to volunteer to do some testing and give me feedback, I can offer a steep discount on the controller.
If you ever find yourself in a fair fight, your tactics suck.
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Re: 46RE standalone controller (I think I'll design one)
[Re: hooziewhatsit]
#1929739
10/10/15 06:59 PM
10/10/15 06:59 PM
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Funny that you bumped this last night. I was in a bit of a holding pattern, but just got back from another test drive. The first one with logic enabled to control OD and LU, and it blew up did just fine. The disengagement was a little rough, but I have OD and LU set to disengage at almost the same speed, so I think the roughness was just the RPM jump from both turning off at (almost) the same time. Count the annulus lugs in the overdrive - the part that the park pawl engages (same lugs that the speed sensor senses) and then multiply that time revolutions per mile based on a given prop shaft speed. Are these lugs going to have the same count, on every single 44/46/47/48 RE transmission? Near as I can tell by looking at my sensor outputs, there are roughly 64ish per each 1 driveshaft rotation. Edit: I just went out and counted 23 lugs on a 2WD 46RE core I have.
Last edited by hooziewhatsit; 10/10/15 07:17 PM.
If you ever find yourself in a fair fight, your tactics suck.
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Re: 46RE standalone controller (I think I'll design one)
[Re: hooziewhatsit]
#1950939
11/14/15 04:50 AM
11/14/15 04:50 AM
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Huh. Well, I guess that's that. *select all* *delete* Their price really is reasonable, and is roughly what mine was going to cost. Mine would have a few additional features, and wouldn't need a windows PC to configure it, but by going that route it adds quite a bit of cost. This does take some of the wind out of my sails, and combined with a possible move and full time job in the next few months... So, if you need a controller right now, I'd take a serious look at what they have. I'll probably keep plugging away at mine, but with the potential move, the delivery timeline gets a bit fuzzy.
If you ever find yourself in a fair fight, your tactics suck.
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Re: 46RE standalone controller (I think I'll design one)
[Re: hooziewhatsit]
#2152160
09/11/16 09:31 AM
09/11/16 09:31 AM
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Re: 46RE standalone controller (I think I'll design one)
[Re: Speedog24]
#2398667
11/05/17 02:42 AM
11/05/17 02:42 AM
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So I’m going to bump an old thread, but I’ve been doing a lot of research and I’m interested in what you were working on. Is it still in the works? Any updates if so? If not, would you be interested in parting with what you have done so far? I’m going to be building/programming a module myself if you aren’t going to finish this one, as I don’t care for the one linked above, and I like the features you were going for in yours. Or maybe I could help further production on yours? I’m a carb intake away from a truck with a 5.9 46re stand-alone setup I could test on. (Albeit mine has 190k miles and could go at any time lol) What needs to be done to get this module to production? Well... the prototype worked well enough controlling the governor pressure compared to the road speed. But, there was no way to adjust anything, nor any temperature/4lo compensation. It really needs a LOT more programming to be anywhere near user friendly. Currently the idea was to use a hand held 4x20 character display to do all the programming (@ $120). I could make it use a PC, but that requires a laptop, and another program and more tech support. Or throw a bluetooth module on it and have it talk to a phone, but if I do just android, that cuts out half the market. Or I need to do two more mobile apps for apple and android. Beyond that, one of the first main hangups is that I really know relatively little about transmissions and troubleshooting them. So if a customer installs this and says it slips or does something weird, I have no way to help them figure that out, other then sending them here Secondly, I never did find a good source for any of the electrical plugs the harness needs (the 8 pin RE is $50 with pins already crimped, no good source for the speed sensor plugs, etc). With base costs like that, I'd have to charge at least $700-800 each to make it worthwhile, which seems higher than most would want to pay. I also don't have the vehicle I was testing it on anymore, so I don't a way to test it. Finally, I also recently got a full time job, and we're working on starting up a laser engraving business, so I don't have that much free time anymore to spend on it.
If you ever find yourself in a fair fight, your tactics suck.
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Re: 46RE standalone controller (I think I'll design one)
[Re: hooziewhatsit]
#2399191
11/06/17 03:32 AM
11/06/17 03:32 AM
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Speedog24
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Ok, so challenge accepted I have the time, vehicle, and resources to make this happen. Besides all the discussion in this thread, do you have any other good info for the theory of operation you were following?? What hardware did you base your design around? And what language were you programming in? I have experience working with c, c++, and some python. Would you consider parting with your prototype design, and let me continue it? Or am I better starting from scratch? I am no trans expert, but I have rebuilt several autos and studied operational theories in respective atsg manuals and the like. I think there could be a few ways to reduce some hardware costs, and I’m willing to fry my trans trying. (It needs rebuilt before long any way). Feel free to PM me, I’d be happy to discuss ideas
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