Hello gurus.

93' (9/92) bmw 525iA m50tu here. My driveway is located at the bottom of a blind hill and being how I like to baby my car, I hate reving out to 3500-4000RPM to shift when everything is cold in the morning. (More so in the winter than summer, summer is 2900-3200 RPM) I have read this is done to warm the drivetrain up but that seems a little high. I accidentally have found that if you slip down into sport mode then back into drive before speeding up on the road, it shifts like its warmed up. Is this bad to do? If not then maybe somebody else with the same problem can use this trick. I like being able to moderately accelerate @ 2500rpm (like a grandma). Thanks

NovceGuru