What trans do you have????
If you have an automatic it may be your problem, especially running the 4.11's. You may want to add a deep pan or a separate trans cooler. If you don't have an auto, it may just be the temp your car runs at with it's setup.
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347 (Coast High short block), 279/284, TFS TW heads, Stealth, 750 Holley, Flowtech hdrs, Dr. Gas X, 2 Chmbr Flowmaster, MSD 6AL-Dist.& SS coil, March serpentine pulley system, Art Carr C-4 (Soon to be a Richmond 6 spd), Currie 9" w/3.50, alum Drv Shft, susp mods, Total Control subframes & tower braces, Trans Am Racing power dual master, 4 wheel disc, 17x8 Torqthrust II's
Something up my sleeve
In a 66 coupe