HD Sun gear shell – ACDelco, Tank, Beast, Sonnax Smart Shell.Pinless 1-2, 3-4, and forward accumulator pistons – to replace OEM plastic.Overdrive billet servo – Superior or Sonnax.2 nd gear servo – Corvette and billet Superior or Sonnax.Transgo shift kit, Superior shift correction, Sonnax Zip, Sure Cure, or Fairbanks.Upgrade 3-4 clutch - Alto 9 clutch high energy, Red HP, or Raybestos Z-Pak.Transtec is the highest rated kit available and used by most rebuild shops.Īdditionally, you can add the following transmission upgrades and options to this kit: The Transtec overhaul gasket set contained within this kit includes every rubber seal, gasket, o-ring, metal clad seals, and Teflon sealing rings that you'll need to complete your rebuild. All high quality BorgWarner friction clutch plates.This master overhaul rebuild kit includes: I'll be interested in Frank Performabuilts insight on this as well.New master rebuild box kit for the 1993-up GM 4L60E 4L65E 4L70E 4L75E M30 automatic transmission. I know this is kinda off topic but I figured I would throw it out there.
Basically Im saying to "properly" do it requires the mechanical parts and upgrades to make firm shifts rather than relying on tuning to solve it for you with forced pressures. 90psi is the stock pressure for 05/06 GTOs and I still use that setting with my built trans with shifts recorded. IMO, a proper shift kit should be utilized to deal with shift upgrades rather than taking shift pressures above 90psi with tuning alone. There is a decent trans guy on the HPT forum that always says dont bump line pressure without it.
The Corvette servo can help in firming up the 1-2 shift and I've also read that it is more apt to dealing with shift pressure increases. There is also aftermarket servos that are just as good or better made by companies such as Sonnax, TransGo.etc. The 4L60/65E series "Corvette servo" will work in non-equipped models.
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