🔥 Twisted PRO™ Grand National 200-4R Performance Transmission

Rated 450–550 HP

Built Exclusively for 1986–1987 Buick Grand National, GNX, T-Type & Turbo T

Designed specifically for the legendary turbocharged Buick 3.8L V6, the Twisted PRO™ Grand National 200-4R is engineered for serious street performance, weekend drag racing, and boosted street cars making up to 550 horsepower.

Unlike universal 200-4R builds, this transmission is calibrated exclusively for the unique hydraulic characteristics, boost curve, and torque delivery of the Buick Grand National platform.

Whether you're restoring your GN, upgrading your weekend cruiser, or building a street/strip turbo Buick, this transmission delivers crisp shifts, improved durability, and dependable overdrive performance.

🔧 TWISTED PRO™ PERFORMANCE COMPONENTS

✔ Twisted Torque™ Performance Valve Body Calibration

GN-specific hydraulic calibration engineered for quicker, firmer shifts without sacrificing street manners.

✔ GN Hi-Rev Governor

Correct shift timing specifically matched to the turbocharged Buick V6 powerband.

✔ Twisted Torque Performance Clutches

High-performance friction material for increased holding capacity.

✔ Kolene Steel Clutch Plates

Superior heat resistance and improved clutch durability.

✔ Heat-Treated Input Shaft

Stronger than stock for aggressive street driving and moderate boost applications.

✔ Hardened Sun Shell

Eliminates one of the most common 200-4R hard part failures.

✔ Hardened Stator Support

Improves durability under high converter load and elevated line pressure.

✔ Superior Super Servo

Increases band apply force for stronger, more consistent 2nd gear operation.

✔ Heavy-Duty Kevlar Band

Excellent holding power with increased resistance to heat and wear.

✔ .500 Performance Boost Valve

Raises line pressure for quicker clutch application and reduced slippage.

✔ Complete New Bushing Kit

Restores proper internal clearances throughout the transmission.

✔ 10-Vane High-Volume Performance Pump

• Heat-treated pump components
• Hardened pump rings
• Teflon pump bushing
• Corrected pump clearances
• Optimized oil flow for high-performance operation

✔ New High-Flow Transmission Filter

Provides consistent fluid flow during spirited driving and sustained high RPM operation.

🔥 INCLUDED PERFORMANCE CONVERTER

FREE 2500 Stall Lock-Up Performance Torque Converter

Matched specifically for turbo Buick applications to provide:

• Faster turbo spool
• Improved launch characteristics
• Excellent street drivability
• Efficient highway cruising with lock-up operation

Higher stall speeds available.

🚗 DIRECT FIT APPLICATIONS

✔ 1986 Buick Grand National

✔ 1987 Buick Grand National

✔ 1986–1987 Buick T-Type

✔ 1986–1987 Buick Turbo T

✔ 1987 Buick GNX

✔ 3.8L Turbocharged Buick V6

⭐ WHY CHOOSE THE TWISTED PRO™ GRAND NATIONAL?

Every transmission is custom built to order using premium performance components—not assembled on a production line.

Each transmission is:

✔ Completely remanufactured

✔ Performance upgraded throughout

✔ GN-specific calibrated

✔ Pressure tested before shipment

✔ Built by experienced transmission builders

✔ Backed by real technical support before and after the sale

💪 POWER RATING

Rated: 450–550 HP

Designed for:

• Street Performance
• Turbo Buick Builds
• Weekend Drag Racing
• Mild Alcohol Injection Setups
• Moderate Boost Applications

Ideal for most street-driven Grand Nationals producing up to 550 horsepower when properly tuned.