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AARDQ
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« Reply #45 on: February 28, 2017, 08:36:52 PM »
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I think I was happiest at 10% (1.1 ohms) for the base line pressure and shift solenoids, but I ended up at 20% for the TC function. 20% (1.2 ohms) on line pressure was really harsh.
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Kilohertz
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« Reply #46 on: March 01, 2017, 08:17:53 AM »
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I think I was happiest at 10% (1.1 ohms) for the base line pressure and shift solenoids, but I ended up at 20% for the TC function. 20% (1.2 ohms) on line pressure was really harsh.
Thank you again. Okay perfect. I will round up the parts and get ready for a little warmer weather. I am going to do some research on the internals of the 5HP19. I would like to know if line pressure affects the TCC lockup, and if so, does increasing the line pressure increase the holding power on the TCC. I'm suspecting it will and hoping it will fix the slip when warm problems. Cheers |
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Jerry Tunin
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« Reply #47 on: March 01, 2017, 11:50:03 PM »
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I intend on doing this mod as well on the 1.8t. I'll keep everyone updated.
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f-schlauch
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« Reply #48 on: March 16, 2020, 07:47:57 AM »
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Just tried this and the TCU went P1748 real quick
I've soldered in 0.8ohm for EDS4, everything else 1.1ohms
Did I miss something?
RS6 C5 / 4B0 927 156 FB
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« Last Edit: March 16, 2020, 07:57:14 AM by f-schlauch »
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flash a few, brick a few
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mikeb1223
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« Reply #49 on: March 28, 2020, 10:39:37 AM »
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You used 3w resistors, you have to use .5w
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IamwhoIam
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« Reply #50 on: March 28, 2020, 12:32:00 PM »
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You used 3w resistors, you have to use .5w
How can a resistor's power rating possibly affect it's job as a RESISTOR?  |
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I have no logs because I have a boost gauge (makes things easier)
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f-schlauch
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« Reply #51 on: April 11, 2020, 03:51:54 PM »
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I've soldered in 0.8ohm for EDS4, everything else 1.1ohms
EDS5 needs to be 1ohm, otherwise P1748 at least in my case |
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flash a few, brick a few
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jibberjive
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« Reply #52 on: March 17, 2021, 03:58:31 AM »
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It's been a few years since there was much input here regarding potential modification of the TCU via software, rather than hardware. Anyone by chance have some progress towards that end that they care to share?
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prj
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« Reply #53 on: March 17, 2021, 04:27:11 AM »
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Yes.
Stock trans, no slip.
It can actually hold in excess of 900nm with the correct software modifications.
A lot of stuff needs to be recalibrated due to MDNORM issues.
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nunovti
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« Reply #54 on: March 28, 2021, 04:31:37 PM »
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Yes.
Stock trans, no slip.
It can actually hold in excess of 900nm with the correct software modifications.
A lot of stuff needs to be recalibrated due to MDNORM issues.
nice job |
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Door ding
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« Reply #55 on: June 29, 2023, 02:58:09 AM »
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Would these modifications work on a 2004 2.7t Allroad with the 5hp19 or is the tcu layout/requirements different from the one shown in that last photo?
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prj
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« Reply #56 on: June 29, 2023, 03:09:59 AM »
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Probably.
The main problem on the 5hp gearboxes is that the shift maps, the solenoid linearisation maps and the holding pressure maps all abruptly end at a certain torque.
Anything past that torque causes the box to slip, because it can not make any more pressure.
Fixing the linearisation for the solenoids and the holding pressures, as well as extending the shift pressure maps fixes this issue.
6HP and 8HP do not have this issue, their linearisation even stock is way past what the engine could ever make in stock form. Hence why usually there are no slipping issues.
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cb_jjj
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« Reply #57 on: August 28, 2023, 10:47:04 PM »
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In 2023, is there still anyone around that programs the 5hp19 TCU? Probably.
The main problem on the 5hp gearboxes is that the shift maps, the solenoid linearisation maps and the holding pressure maps all abruptly end at a certain torque.
Anything past that torque causes the box to slip, because it can not make any more pressure.
Fixing the linearisation for the solenoids and the holding pressures, as well as extending the shift pressure maps fixes this issue.
6HP and 8HP do not have this issue, their linearisation even stock is way past what the engine could ever make in stock form. Hence why usually there are no slipping issues.
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sda2
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« Reply #58 on: September 06, 2023, 12:20:50 AM »
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The BMW world also desperately needs data for the 5HP19. But since there are like two people who have the A2L, one of them passed away a whole while ago, its down to prj.
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prj
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« Reply #59 on: September 06, 2023, 12:24:26 AM »
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There's a hell of a lot more than two people who have the a2l.
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