its in?....hotness....probably just like a new car, once its moving on the road

j/k....is there a break in period on trannies, like change the fluid at 100miles, 1k miles, 5k miles?
__________________
EB
99 Riviera, Bone stock, 14.34 @ 96 "Walking 5.0's in luxury" RIP
95 Cherokee, Bone stock 16.2 @ 83 "Treeing your 3rd gen and beating it to the line despite trapping less....and looking better"
93 TA, Bone stock, 13.8 @ 100 "Beating ****** drivers in ****** LS1's"
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R.I.P. Tia