i had a similar problem when converting to a c172. got it cured by two things:
1. laying the flight manuals for the two aircraft side by side and comparing the characteristic speeds. in my case, the 172 had a slightly higher recommended approach speed but a lower stall speed. as soon as i understood there was a greater speed margin to lose, everything else was clear.
2. for a while (until i got a better feeling of the plane), trimming slightly nose up on the final so i wouldn't have to pull so hard.