One for the Techies
Upgrade early FL 5 speed auto to S mode.
As you will know early FL 5 speed autos did not have the sport setting on the 5 speed. There is quite a bit about re-coding PF and FL boxes to change their shift patterns but little on converting a FL 5 speed with PRND432 to PRNDS.
After a major refit of the Murple thanks to MJ with lots of work done we started talking about this and as she had a TCU from a late model FL S8, we thought we would swap mine out but keep the current shifter to see if it would work.
It does. But there are some oddities. After fitting the replacement TCU the DIS no longer displays the PRND432 or PRNDS! nothing there at all!
We took it out for a run with VCDS attached and the S mode works just as it shoud. In D the car changes up and down as one would expect. In 'TIP' the display comes back on and 5,4,3,2,1, are all displayed and gear changes happen as they should.
However, select 4 on the shifter and, BINGO, VCDS says its in sport mode, the reves change and the box is indeed in Sport mode. Nothing shows on the DIS though.
Select 3 and it all goes horrible wrong! Faults come up, the DIS reports no gear shifts in 'TIP' and I had to stop, turn the engine of and a couple of code were thrown on VCDS to the effect that the F125 switch was reporting an implausible position. As actually it should as there is no shifter position below S (4) on a sport shifter.
So; why is the DIS not showing P,R,N,D,S when in any of those positions?
Thoughts anyone?
__________________
Conan (the Librarian)
Watch it if you dare
Currently,
2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block.
1997 4.2 A8SQ - the Projekt. 12 years and ongoing!
1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard
2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion.
2005 C5 Allroad 2.5TDi FE - Grey - Workhorse.
2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter.
Previously
2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex
1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure.
1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex.
2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on.
1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8.
And a list of non VAG going back 40 years before I saw the light. 
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