TEREX 72 31AA Wheel loader SLOW UNTIL WARMED UP

Where is the dipstick located to check the transmission [Alison I believe] on 72 31aa Wheel loader? When I start it up cold it takes a while to get it to drive forward and backwards. I do not know where the dipstick is located to check the transmission. OR if you have any other thoughts I need to address, please let me know. If anyone has a parts breakdown or Service Manual for this machine--GREATLY APPRECIATED! [4v71 Detroit for power].
Thanks

TEREX 72 31AA Wheel loader SLOW UNTIL WARMED UP