I just had my trans completely rebuilt with the best parts I could find. The turbo was killing the clutches and destroyed the O/D band. Anyway, I would get a Protorque 2,800-3,000 stall converter, shift kit, Autologic chip, trans cooler and 3.73 gears if you don't have them already. You will definitely want to get some D/Rs because it's a waste of a better converter if you can't launch. Also, you might want to upgrade to a synthetic trans fluid like Redline. Mercon V is good because it's a blend, but you might need to change it more often. The auto can take tons of punishment. From 98-up, Ford got smart and put in a mechanical diode(One way roller for stronger 2nd gear) & Borge warner clutches rated for over 400 hp and 400 lb-ft.
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99 Silver GT Auto
TDC Stage II Turbo
Built 4R70W with Raybests Blue Plate clutches
Aeromotive 1000 HP fuel system
MSD DIS4
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