Hi Im looking to upgrade from my old 3-10 11-36 drivetrain to a 1-10 11-46 drivetrain. Could i keep my current rear shifter considering it is also a deore 10 speed shifter? Thanks in advance!
Yes you can. I did the same using a Sunrace cassette and XT 11 speed derailleur. I ran the original derailleur on a goat link but changing to an 11 speed shifter was a massive improvement.