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D2 - Transmission Gearboxes, diffs, drive shafts.

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  #11  
Old 15th August 2020, 10:15 AM
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Quote:
Originally Posted by HPsauce View Post
Now who might that be?
I think we need her assistance to help with this one. Specifically, other than one being 8-pin and the other 9-pin, what other differences are there, other than visual (the actual switch internals). Is there something about the older 8-pin unit that won't play ball with the newer gearbox?

Can you confirm that the only issue is that the park P light doesn't illuminate and that everything works, or have you not driven it yet (you mention being it the garage).
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts

My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts

Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights

My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds
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  #12  
Old 15th August 2020, 10:18 AM
HPsauce HPsauce is offline
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I'm at my limit to be honest, but others know more and will be along in due course. Basically you have a later gearbox in an older car with it's original (older) F125.

It could also be something to do with the gear shift lever as well, are they the same in both cars or not? Or even the TCU...
(Trying to think what else might be different/incompatible )
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!)
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/Platinum. Every option (I think) except electric rear seats, tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
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  #13  
Old 15th August 2020, 11:25 AM
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I did swap tcms so the one in car now is one that came with that gearbox Y729XGA not driven yet I did have prop with starter motor I put the small lead on wrong terminal so would not crank but that has been sorted now cranks but I've as yet to fill her up with all the fluids engine oil. Coolant and power steering fluid but didn't want to as I would have to drain again if I don't get this sorted and I understand there is a process for stearing fluid apart from no light up of p nothing else is wrong fingers crossed won't be running or starting with no fluid just sorting this gearbox first. Do you think I've got to go under and adjust gearbox cable I understand there is not much room for error as getting that in the right place but don't have access to vcds to check and would not know how to do vcds myself hope I'm making sense been on this car for 2 years oh and before I cranked it over for first time I put some misting oil in Cylinders moved it by hand with all plugs out shall turn over at some point with fuel pump disconnected to get the oil circulated as much as possible before start
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  #14  
Old 15th August 2020, 02:02 PM
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Okay, ignoring the driven part, can I assume that the park P light worked previously and no longer works? If so, then I'd suggest it has to do with the wiring of the plug. Specifically, the change from the 8-pin to 9-pin wasn't just a case of changing plug format, and the additional wire must be used for something. Again, MJ may be the person who can answer all these questions.
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts

My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts

Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights

My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds
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  #15  
Old 15th August 2020, 02:20 PM
HPsauce HPsauce is offline
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Sean, I think (hope) you misunderstood.
My reading is that it's the same F125 switch that was originally in the car, fixed to the replacement gearbox.

So it's the same shifter, cabling, wiring and F125 but the gearbox and TCU have been swapped.

Something in there will be incompatible, but we need someone more knowledgeable than me to comment.
That's why I asked about the shifter on the current and donor cars; are they the same or not (Sport mode etc.)

It would be interesting to see the internal structure of the two types of F125. I've seen several photos of the later version (and can supply them myself if needed) but don't recall any of the earlier one with round plug.
Here's a later type (damaged) which actually has 9 cables internally in groups of 4 and 5. I think the 10-pin plug actually only has 9 pins installed:
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__________________
2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!)
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/Platinum. Every option (I think) except electric rear seats, tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.

Last edited by HPsauce; 15th August 2020 at 02:34 PM.
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  #16  
Old 15th August 2020, 02:39 PM
HPsauce HPsauce is offline
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It would be instructive to see the layout of an 8-pin F125 but my "interpretation" of the 10-pin layout is:
Top 2 tracks, Park and Neutral circuit (with which mine has a problem) used to allow/inhibit starting mainly.
Next 2 tracks, Reverse circuit, goes all the way to the reversing lights so can take quite a load and burn out.
Bottom 5 tracks, detailed gear lever selection position communicated to the ECU, dash etc.

My money is on the lower tracks being different between the versions. So, if anyone has an old F125 internals picture....
__________________
2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!)
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/Platinum. Every option (I think) except electric rear seats, tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
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  #17  
Old 15th August 2020, 03:33 PM
HPsauce HPsauce is offline
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And of course there's one on the forum, TOTALLY DIFFERENT inside see here: http://forum.a8parts.co.uk/showpost....8&postcount=17
Cams and microswitches, not tracks. And Audiworld has a better-sized view:
http://forums.audiworld.com/picture....ctureid=166348
It's an interesting bit of total rethink redesign, presumably just to put a bit of extra functionality (and an extra wire) inside what is effectively the same size casing with the same rotating physical input.

I'd put money on it being an incompatibility between the newer F125 switch and older TCU.
Though how you solve it, heavens only knows...…….. Ideas on a postcard please!

Is it worth the risk of putting the original TCU back or would it cause a problem with an older gearbox?
__________________
2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!)
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/Platinum. Every option (I think) except electric rear seats, tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.

Last edited by HPsauce; 15th August 2020 at 06:37 PM.
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  #18  
Old 15th August 2020, 07:43 PM
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craig craig is offline
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W8AND is older than Y729XGA all I did was take XGA gearbox tcm and f125 put them in W8AND but wand is the one that has round f125 so I put that on Y729XGA box they both did work before the gearbox swap so guys and girls am relying on your help 100 percent to get this poor car on the road and to one of the meets its on my bucket list I've waited so long for that moment won't give up
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  #19  
Old 15th August 2020, 08:22 PM
HPsauce HPsauce is offline
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Sorry, but I'm genuinely lost. Can you go step by step saying exactly which is which as you go.
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!)
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/Platinum. Every option (I think) except electric rear seats, tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
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  #20  
Old 15th August 2020, 08:47 PM
HPsauce HPsauce is offline
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Trying to reread all you've said and work it out.
Quote:
Originally Posted by HPsauce View Post
Basically you have a later gearbox in an older car with it's original (older) F125.
Is this correct?

I "think" you are trying to fix the older car (W8AND) with the gearbox from the newer car (Y729XGA).

As I read it you currently have the gearbox as well as the TCU from the newer car (XGA) fitted to the older car (AND). BUT the original F125 is still on AND because it and the wiring loom have the older round 8-pin connector.

Earlier I said
Quote:
I'd put money on it being an incompatibility between the newer F125 switch and older TCU.
In fact I think I got that the wrong way round. The (older) car you're trying to fix (AND) has an OLDER F125 and NEWER TCU. But they are still incompatible in some way.

My other question needs correcting:
Quote:
Is it worth the risk of putting the original TCU back or would it cause a problem with a newer gearbox?
but it still stands though, as does the query about the shifters.
__________________
2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!)
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/Platinum. Every option (I think) except electric rear seats, tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.

Last edited by HPsauce; 15th August 2020 at 08:52 PM.
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