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Author Topic: C6/B7 6HP19A gearbox to C5 5HP19 swap  (Read 20453 times)
BlackT
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« on: February 22, 2021, 12:09:50 PM »

I am planing to upgrade 5hp19 gearbox to 6hp19 in audi C5 2.7 TT.
As I seen on forum M7.1.1 2.7TT can be paired with 6hp TCU.
And looking to shematic TCU only need power and canbus to work. Also I see that C6 have samo immo in TCU so I am planing to get everything from late B6 or B7.
Diff gear ratio as far I can see are same on 3.2 FSI C6 and C5 2.7 TT. So I can leave rear diff from C5 on car.

Is this is possible swap to get everything work?
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BlackT
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« Reply #1 on: February 26, 2021, 04:02:41 AM »

I can easily found gearbox from B7 2.7 TDI or 3.0 TDI.
From 3.2 FSI is imposible to find
Now I have two questions:
1. Can gearbox from TDI communicate with petrol ECU?
2. Is it possible to flash TDI gearbox with 3.2 FSI sofware?
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dus
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« Reply #2 on: March 11, 2021, 09:20:22 PM »

gear rations 3.2 a4b7 box match to 2.0 tfsi a4b7 box witch is understanding turbo load. 2tfsi box is better. or try crossflash 3.2 to 2.0tfsi. I use gearbox, flywheel and torque converter from 3.0 mpi a6c6 but not yet driven with boost. a6c6 2.7t swap.
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BlackT
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« Reply #3 on: March 11, 2021, 10:25:03 PM »

I can get 2.0TFSI gearbox from B7, but will it match with 2.7TT ECU?

gear rations 3.2 a4b7 box match to 2.0 tfsi a4b7 box witch is understanding turbo load. 2tfsi box is better. or try crossflash 3.2 to 2.0tfsi. I use gearbox, flywheel and torque converter from   3.0 mpi a6c6   but not yet driven with boost. a6c6 2.7t swap.
C6 3.0 MPI?  I didn't see that?
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macxxx
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« Reply #4 on: March 13, 2021, 07:12:25 AM »

There is no 3.0mpi in c6
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dus
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« Reply #5 on: March 13, 2021, 10:00:27 PM »

this exists on the Russian market

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dus
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« Reply #6 on: March 13, 2021, 10:08:06 PM »

I can get 2.0TFSI gearbox from B7, but will it match with 2.7TT ECU?

need to try. there is no answer now. the 2.7 turbo ecu works with 6hp19 from NA 3.0, the car drives, but there are problems with not understanding the load of the gearbox. see Stoti thread http://nefariousmotorsports.com/forum/index.php?topic=17945.0
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macxxx
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« Reply #7 on: March 14, 2021, 12:08:19 AM »

this exists on the Russian market


Forgot that there are diffrent markets Smiley
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BlackT
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« Reply #8 on: May 16, 2021, 11:52:19 PM »

gear rations 3.2 a4b7 box match to 2.0 tfsi a4b7 box witch is understanding turbo load. 2tfsi box is better. or try crossflash 3.2 to 2.0tfsi. I use gearbox, flywheel and torque converter from 3.0 mpi a6c6 but not yet driven with boost. a6c6 2.7t swap.
What ECU do you have?
Are gear ratios same for every B7 6HP?  Looking on ETKA all 6HP use same rear diff with 3.1 ratio
« Last Edit: May 16, 2021, 11:54:14 PM by BlackT » Logged
dus
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« Reply #9 on: May 23, 2021, 04:19:58 AM »

What ECU do you have?
Are gear ratios same for every B7 6HP?  Looking on ETKA all 6HP use same rear diff with 3.1 ratio

4Z7997551RX 4Z7907551R BEL
Yes gear ratios same for every 6HP
rear diff, front diff and transfer case are different
but shaft speed sensor mounted before transfer case and diffs.
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dus
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« Reply #10 on: July 25, 2021, 06:36:37 AM »

here is connected box HYH from a4b7 2.0tfsi BWE
the throttle box detect, the opening percentages are displayed, the can bus is compatible, but it need to change the identifiers to 2tfsi in ecu flash
CANVERS, FMOTC
« Last Edit: July 25, 2021, 06:42:44 AM by dus » Logged
EAF1-KR
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« Reply #11 on: September 01, 2021, 12:00:33 AM »

Hi, is 6HP19 finished?
« Last Edit: September 01, 2021, 12:23:43 AM by EAF1-KR » Logged
EAF1-KR
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« Reply #12 on: September 01, 2021, 12:19:35 AM »

Hi, is 6HP19 finished?
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EAF1-KR
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« Reply #13 on: September 04, 2021, 12:45:47 AM »

here is connected box HYH from a4b7 2.0tfsi BWE
the throttle box detect, the opening percentages are displayed, the can bus is compatible, but it need to change the identifiers to 2tfsi in ecu flash
CANVERS, FMOTC


Hi, A4 B6 1.8T I encountered the same problem when installing 3.2FSI 6HP19, can you help me solve it?
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BlackT
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« Reply #14 on: September 13, 2021, 03:59:24 AM »

Hi, A4 B6 1.8T I encountered the same problem when installing 3.2FSI 6HP19, can you help me solve it?
What DTC do you have?
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