My 4T65eHD has held up for the past 7 years with numerous full throttle runs. Those transmission with a bit of modification work have been built to handle 900HP. That might be on the top edge, but forum member Darkhorizon ran a 9.87 @142 mph 1/4 mile time with his 3800/4T65eHD combo. Ash Scott how he likes his transmission. You won't go anywhere near that with any of the sticks that have been used or swapped in the Fiero
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "