Pure Drivetrain Solutions ZF 8HP51 Stage 2 Transmission Rebuild – Toyota GR Supra (A90/A91)

OVERVIEW

This is a build service performed on your own ZF 8HP51 unit, not an outright sale of a new transmission. Pure Drivetrain Solutions completely disassembles the transmission, washes the casing and housings, inspects every hard part and checks the case for cracks or damage before the unit is reassembled with upgraded internals.

The Stage 2 package for the A90 and A91 Toyota GR Supra adds billet super alloy hub drives, custom pistons on several clutch assemblies and substantially higher clutch counts: clutch C and clutch E each gain five frictions for eleven total, clutch D gains two for six total, and clutch B picks up a 60% increase in friction surface area. Basket assemblies are modified for better oiling and taken through a three-step process for added strength and durability.

SPECS

• Rebuild service performed on the customer's own ZF 8HP51 automatic transmission — not an outright sale of a new unit
• Complete disassembly, vigorous washing of the casing and housings, and inspection of all hard parts and the case for cracks or damage
• Billet super alloy hub drives
• Upgraded clutches and steels throughout the entire transmission
• Heat treated and hard anodized clutch baskets, modified for improved oiling
• Upgraded O-rings and seals within the valve body assembly
• Cog drives and shaft modified for better lubrication transfer
• All new gaskets, seals and rings
• Brand new pan, filter element and fluid supplied with the build
• Custom pistons used on several clutch assemblies
• Upgraded clutch pack for clutch C — +5 frictions (11 total)
• Upgraded clutch pack for clutch E — +5 frictions (11 total)
• Upgraded clutch pack for clutch D — +2 frictions (6 total)
• Upgraded clutch frictions for clutch A
• Upgraded clutch frictions for clutch B — 60% increase in surface area
• New clutch packs use PDS proprietary paper frictions and steels throughout the entire transmission
• Torque converter in this package yields a 3,000 rpm stall on the foot brake while keeping a tight feel for around-town driving
• Laser etched Pure Drivetrain Solutions logo

PARTS INCLUDED

• Your ZF 8HP51 transmission, fully rebuilt to the specification listed above
• Upgraded clutch packs — PDS proprietary paper frictions and steels
• Modified, heat treated and hard anodized clutch baskets
• Complete gasket, seal and ring set, including upgraded valve body O-rings and seals
• New transmission pan and filter element
• Transmission fluid required to fill the unit
• Laser etched Pure Drivetrain Solutions logo
• Rebuilt high-stall race torque converter, if that option is selected at checkout

TECH RESOURCES

Additional Parts Required

• Your transmission core. Pricing covers rebuilding the unit you send in. If you do not have a core to send, contact Speed Logic before ordering — core purchase is quoted separately.
• Freight both ways. Shipping the core to Pure Drivetrain Solutions and the finished unit back is not included in the listed price.
• Post-install TCU adaptation / re-learn. Pure Drivetrain Solutions calls for the transmission re-adaptation (re-learn) process to be run after installation, which requires a scan tool capable of ZF 8HP clutch-fill adaptation. Installer supplied.
• Transmission fluid, pan and filter are already included with this rebuild — no separate fluid or filter kit purchase is required.
• Pure Drivetrain Solutions does not specify a transmission flash or TCU tune as a requirement for this rebuild.
• Installer-supplied transmission jack, lift and standard driveline service tools for removal and refitting.

Installation

• Pure Drivetrain Solutions – ZF 8-Speed Fluid Fill & Break-In Procedure (PDF)
• Pure Drivetrain Solutions – ZF 8-Speed Change Fluid, Pan & Filter Procedure (PDF)
• Pure Drivetrain Solutions – 8HP Resources: transmission identification, TCM adaptation and quick-learn procedures
• Pure Drivetrain Solutions – transmission break-in process
• Fluid level must be checked with the transmission fluid between 40°C and 50°C, per the PDS fluid fill procedure.
• Break-in: run the re-adaptation procedure if possible, then complete roughly 500 miles of easy stop-and-go driving, cycling up and down through the gears. PDS states that cruising on the highway will not properly break in the clutches.
• Pure Drivetrain Solutions does not publish a vehicle-specific removal and installation manual for this unit. Removing and refitting a ZF 8HP transmission is a specialist job and should be carried out by a qualified transmission shop.

Notes

• Freight cost is not included in the price and varies by location. We will reach out to coordinate shipping freight cost.
• Pure Drivetrain Solutions does not publish an official part number, a rated torque capacity, a published lead time or a written warranty for this build. Confirm fitment, current build time and warranty terms with Speed Logic before ordering.

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