This is how you transition over:
Originally posted by Needzize
Eventually no matter what you are doing or what you are on, the strength gains will come to an end. What I have found worked well for me was when I couldnt add more weight to the 5x5, I switched over to 5x3 instead, and was able to keep adding weight. The beauty there is that as you keep adding weight past where you were stuck on the 5x5, that weight you were stuck on will feel like a joke when you go back to it as you were just lifting more, albiet for less reps.
Here's an example I used when my squats went stale. I had been stuck on 405lbs for a while, but just couldnt get all my sets so that I could add more weight, so heres what I did.
week 1 410lbs 5x3reps
week 2 415lbs 5x3reps
week 3 420lbs 5x3 reps
week 4 425lbs 5x3 reps
week 5 430lbs 5x3reps
week 6 435lbs 5x3 reps
then back to 5x5
week 7 405lbs 5x5(now this felt really light after 435lbs)
week 8 410lbs 5x5
etc.......
But this time when I finally plateaued again, I was squatting 445lbs for 5's. Notice the weight increases were very small, percentage wise it was almost nothing, but see how it added up. When I first started the 5x5 routine back in the day, I was squatting 225lbs for 5x5, and since then the program has allowed me to put over 200lbs on my squat, and about 4" on my quads.