My FL2 (2013) with automatic transmission has an issue when driving about 50mph. It´s vibrating and if/when keeping the speed the vibration changes to shaking. So it can be terrible.

I have new balanced tires, the outer joints of front drive shafts ae replaced and also the prop shaft is new and I have made the transmission reset by instructions i got from internet: Turn on the "ignition", then pressing down the accelerator pedal for 30 secs, then relesing the pedl and turn off the "ignition". After that starting the engine normally.

Nothing has helped yet, so if anyone could help me to advise, what should I check next. Any help would be great. Thanks in advance...

-Juha

Engine mounts, transmission mounts?

a possible issue : -

I had a severe steering wheel shake once that was in fact a sticking brake caliper, after a drive check if the wheels are really hot, in particular one wheel possibly front wheel hotter than the other 2017 SEAT Ateca 4drive 2.0 xcellence (May 2022 -
2007 HSE with HST bodykit in Zermatt Silver 169,700 miles (dec 2016 - May 2022 )
2007 Honda Civic Type S GT (2012-2017)
2002 Mini Cooper S (2008-2012)
1992 Honda Legend 3.2i (2003-2008)
1990 Honda Concerto (1999-2003)
1985 Honda Accord (1997-1999)
1983 Honda Accord (1993-1997)
1983 Mini Mayfair (1988-1993)
1974 Mini 1000 (1979-1986)

Mine did exactly the same at 50mph under light throttle load..after much diagnosis it turns out it was the torque converter which was worn, these have a lockup clutch in them that locks up around 1500-1800 rpm which is 50mph in 5th, and can wear out at higher mileages. Mine had done 158k

New torque converter and a transmission recondition at my local transmission specialist and the problem is fixed.

Could be other things though, just letting you know my situation if it helps

p.s the transmission reset you did is actually a reset for the throttle body valve, although this procedure can help with smoothing out things so may give a misdiagnosis.

As far as I know gearbox adaptations can only be done via Land Rover diagnostics.