Twisted Pro™ Buick Grand National 200-4R Performance Transmission

1986–1987 Buick Grand National 3.8L Turbo

Rated 500–550 HP

The Twisted Pro™ Grand National 200-4R is our performance street build for modified 1986–1987 Turbo Buick applications in the 500–550 HP range.

Built with the correct BRF-type Grand National valve body, TransGo HD2-A performance calibration, dual-fed direct clutch, 3-clutch overdrive, upgraded intermediate band and servo, and 10-vane performance pump.

NEW 1800–2100 RPM Lock-Up Torque Converter Included.

🔧 TWISTED PRO™ GRAND NATIONAL BUILD

HIGH-ENERGY CLUTCH PACKAGE

• Premium high-energy friction clutches
• New performance steels
• Increased-capacity direct clutch pack
• Dual-fed direct clutch
• Clutch clearances checked and set

3-CLUTCH OVERDRIVE

• 3-clutch OD conversion
• Modified/replacement OD piston and clutch stack
• 3 high-energy OD frictions
• Matching steels
• OD clutch clearance checked and set

BRF-TYPE VALVE BODY / TRANSGO HD2-A

• BRF-type Grand National valve body
• TransGo 200-4R-HD2-A Reprogramming Kit
• Dual-feed 3rd/direct circuit
• Billet 2nd servo piston
• Performance accumulator calibration
• Separator plate/orifice calibration
• Full automatic operation retained

SHIFT CALIBRATION

Choose your shift feel:

Mild • Medium • Firm • Wild

Specific WOT automatic shift RPM can also be requested. Governor calibration is set up when required for the requested shift point.

INTERMEDIATE BAND & SERVO

• Wide high-energy intermediate band
• TransGo billet 2nd servo piston
• Servo travel checked and set
• Band clearance checked and set
• Direct drum band surface inspected

10-VANE PERFORMANCE PUMP

• 10-vane performance pump configuration
• Hardened pump rings
• New pump bushing
• Updated pump slide spring
• Pump slide and pivot inspected
• Pump vanes inspected/replaced as required
• Rotor and pump pocket inspected
• Pump clearances checked and set

TV / PRESSURE SYSTEM

• .471/.472 performance TV boost setup
• .500 boost setup used on higher-torque combinations when required
• Pressure regulator valve and bore inspected
• Sonnax oversized PR repair used when bore wear requires correction

HARDENED STATOR SUPPORT

• Hardened / heat-treated stator support
• Stator splines and pump components inspected during assembly

FACTORY HARD PARTS

The Pro retains the factory-style 200-4R hard parts.

• OE forward drum and shaft inspected
• OE input shaft inspected
• Front and rear planetaries inspected
• OD carrier and ring gear inspected
• Sun shell inspected
• Sprags and roller clutches inspected
• Worn or damaged hard parts replaced

COMPLETE INTERNAL BUILD

• Complete bushing kit
• New sealing rings
• New lip seals
• New gaskets and seals
• New filter
• Bearings and thrust components inspected/replaced as required
• Clutch clearances checked and set
• Servo travel set
• Endplay checked and set
• Air checked during assembly
• Line pressure checked
• Final pressure test before shipping

TV CABLE SETUP

The TV cable is not a kickdown cable.

Correct TV cable adjustment is required. TV pressure and cable operation must be checked during installation.

1800–2100 RPM LOCK-UP CONVERTER INCLUDED

Includes a NEW 1800–2100 RPM lock-up torque converter for the Pro Grand National build.

Higher-stall options are available for combinations that require them.

GRAND NATIONAL APPLICATION

1986–1987 Buick Grand National

• 3.8L Turbo V6
• 200-4R automatic
• BRF-type valve body
• Performance street applications
• Rated 500–550 HP

This listing is specifically for the Buick Grand National application.

BUILT TO ORDER

Provide:

• Vehicle year
• Engine combination
• Estimated horsepower
• Boost level
• Turbo size
• Injector / fuel system setup
• Intercooler modifications, if applicable
• Engine modifications
• Rear gear ratio
• Rear tire size
• Vehicle weight, if changed significantly
• Cam / operating RPM range, if known
• Shift feel: Mild / Medium / Firm / Wild
• Desired WOT shift RPM, if applicable
• Intended street / performance use

200-4R GEAR RATIOS

1st: 2.74

2nd: 1.57

3rd: 1.00

4th: 0.67 Overdrive