i did 3.6 lfx on my old FWD GM car swap last year, car weights 1400kg and with my tune had 0-100km/h about 5sec flat at 0 sea level.

i went from 0 sea level to Tehran 1200meters above sea so firstly as usual i felt less power about barometric pressure, then i mentioned trans dont like to downshift like before and accelerate good and when it does ... maybe one gear lower only.

after a few days on my scanner i saw trans fluid temp is between 45~50deg C (120deg F) in compare to 75deg C (167 F) that i had before, then i tried 0-60MPH test and got 6.5sec..i was expected .5 sec slower because of change in elevation but now i m sure it 's not about barometric pressure only.

can low transmission fluid cause ecm to signal less torque from engine? i see 80nm less on my scanner when i compare to same spot and RPM from previous logs.