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| TerroristGHIA |
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I have changed the diff gears in the EF from 3.45 to 3.89. I have the Jaycar Speedo corrector and need to know which pin is pin 4 on the instrument cluster plug. I know which plug it is and the Tech Docs say it is pin 4 for the speed signal, this is the signal i am going to modify.
My next question may seem a little strange. I also need to know which wire on the Auto Computer(V8) is the speed signal as this will need to be modified as well. The reason is that the Auto computer looks for Road speed, not engine revs, and with my speedo adjusted using the Jaycar Speedo corrector kit, the Auto will never see the road speed it is looking for. This will cause over revving under full power driving. Finally, come some one tell me whatr the % change is from 3.45 to 3.89 in the diff ratio. So i can calibrate the corrector Brett
_________________ The Terrorist ED Retired due to RUST. |
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| Waggin |
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Is there a chance that the Trans ECU receives road speed from the cluster or the ECU? As the ECU receives road speed from the cluster via the data link.
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| 4.9 EF Futura |
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OK im not 100% on being able to give the right answer so i'll just throw some random comments down.
The VSS goes directly to the cluster IIRC. The cluster then passes this information on to the TCM. IIRC it's a white wire on the TCM loom... Give me a bit and i'll see if i can dig up the info im thinking of regarding VSS going to the TCM.
_________________ I promise..... I will never die. Last edited by 4.9 EF Futura on Tue Feb 14, 2006 12:01 pm, edited 1 time in total. |
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| 4.9 EF Futura |
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Alright, here is the "411"
1 678 Blue/Yellow - Temp Sensor (input) 2 651 Orange - Diagnostics (input) 3 ??? ?????? - Transmission output data (torque red in reverse) 4 ??? ?????? - Econ mode status (input) 5 681 Blue/Orange - Temp Sensor ground 6 648 Pink - Ignition system, engine speed signal (input) 7 680 Green - Solinoid 5 return (input) 8 652 White/Red - Diagnostics (ground) 9 657 Blue/White - Throttle Position (ground) 10 656 Violet/White - Shift Lever Position (ground) 11 664 Green/Yellow - Solinoid 4 (input) 12 661 Green/Black - Solinoid 1 (output) 13 676 Yellow/Red - Solinoid 6 (output) 14 659 Green - Mode indicator dash light (output) 15 37 Yellow/Black - Battery Positive (power) 16 650 Blue/Red - Throttle Position (input) 17 658 Violet - Shift lever (input) 18 ??? ??? - A/C Status (input) 19 999 White - Shaft SApeed Sensor (input) 20 653 Green/Blue - Diagnostics (output) 21 57 Black - Ground 22 not used 23 not used 24 not used 25 673 Blue/Green - Throttle position sensor reference 5v (power) 26 663 Green/Red - Solinoid 3 (input) 27 662 Green/White - Solinoid 2 (input) 28 477/677 (possibly a typo within book) Yellow/Green - Solinoid 7 (output) 29 665 Yellow - Solinid 5 (output) 30 16 Red/Green - Ignition switch (power)
_________________ I promise..... I will never die. |
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| TerroristGHIA |
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Thanks guys, will chase it up now, hope fully this will work.
Also what is the % difference between 3.45 and 3.91, Sorry i miss quoted in the earlier post, its a 3.91 not 3.89 Brett
_________________ The Terrorist ED Retired due to RUST. |
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| GTBob |
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Percentage difference = 11.74%
_________________ Rotten Old Revhead!!! XW GTHO + EF ex cop car (exractors 2.5 cat back zorst !6" Simmons K&N +airbox mods Lowered with Bilstein shocks+Whiteline Bars NEXT THING Swap HO for GTP or Ferrari! |
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| 4.9 EF Futura |
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0.46 difference between 3.45 and 3.91
0.46/3.45 = 13.3333333 Lol - 3.91... must be a ripper of a daily driver brett!!
_________________ I promise..... I will never die. |
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| GTBob |
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{USERNAME} wrote: I have changed the diff gears in the EF from 3.45 to 3.89. I have the Jaycar Speedo corrector and need to know which pin is pin 4 on the instrument cluster plug. I know which plug it is and the Tech Docs say it is pin 4 for the speed signal, this is the signal i am going to modify.
My next question may seem a little strange. I also need to know which wire on the Auto Computer(V8) is the speed signal as this will need to be modified as well. The reason is that the Auto computer looks for Road speed, not engine revs, and with my speedo adjusted using the Jaycar Speedo corrector kit, the Auto will never see the road speed it is looking for. This will cause over revving under full power driving. Finally, come some one tell me whatr the % change is from 3.45 to 3.89 in the diff ratio. So i can calibrate the corrector Brett No need to do anything more as trans ecu recieves speed signal from cluster on pin 19 (white wire)
_________________ Rotten Old Revhead!!! XW GTHO + EF ex cop car (exractors 2.5 cat back zorst !6" Simmons K&N +airbox mods Lowered with Bilstein shocks+Whiteline Bars NEXT THING Swap HO for GTP or Ferrari! |
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| GTBob |
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{USERNAME} wrote: OK im not 100% on being able to give the right answer so i'll just throw some random comments down.
The VSS goes directly to the cluster IIRC. The cluster then passes this information on to the TCM. IIRC it's a white wire on the TCM loom... Give me a bit and i'll see if i can dig up the info im thinking of regarding VSS going to the TCM. Also white wire on cluster plug pin4
_________________ Rotten Old Revhead!!! XW GTHO + EF ex cop car (exractors 2.5 cat back zorst !6" Simmons K&N +airbox mods Lowered with Bilstein shocks+Whiteline Bars NEXT THING Swap HO for GTP or Ferrari! |
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| TerroristGHIA |
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Yes but when the signal is changed and he TCM goes looking for road speed that the speedo cannot reach then the TCM will not change gears until that road speed is reached, hence the over revving. And yes Martin, its a ton of fun to drive now. Just gotta see how it is on GAS, which will be tonight
Brett
_________________ The Terrorist ED Retired due to RUST. |
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