TTAC commentator Fordman_48126 writes:
I have a 2015 Lincoln MKC powered by the base 2.0-liter turbo and all-wheel drive. My issue is that the AWD system is a part-time setup that defaults to front-wheel drive. Do you know if there a way to convert it via changing and/or modifying the programming on the ECM to run it in all-wheel-drive mode all the time?
I really like the way my wife’s 2010 Audi Q5 handles in slippery conditions with its full-time Quattro system, and the mileage penalty isn’t bad from what I can tell. I find that in many situations the system is detecting slippage but the traction control always seems to activate before the rear differential kicks in.
Getting a definitive answer is difficult. And even if you can unlock the parameters that control all-wheel drive, who knows if anyone tweaks that side of the computer. My advice is to contact a tuning company directly because they might have the ability to unlock that part of the ECM.
But this might not be a good idea, even if it’s a great idea in theory. I reckon FWD-based intelligent AWD powertrains that only activate the rear wheels when needed could be inadequately designed for full-time use. This pertains to the Power Take-Off Unit and all points downstream.
Do you really have faith that companies overbuild PTUs if they never see that much action? Not if it’s my ride I don’t, son …
Even if this is a short-term lease, it’s not a good idea to override the (possible) computer calibration. Instead, get winter tires for more grip, or just leave it alone and enjoy the white knuckle moments of joy of a tuned 2.0-liter Ecoboost in the summer! If they don’t have a tune for your ride yet, just ask.
[Image: Lincoln Motor Company]
Send your queries to sajeev@thetruthaboutcars.