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

1986–1987 Buick Grand National 3.8L Turbo

Rated 350–450 HP

The Twisted Street™ Grand National 200-4R is our stock-based upgraded build for the 1986–1987 Turbo Buick application.

Built with the correct BRF-type valve body and Grand National calibration, premium friction material, updated pump components and a mild TransGo or Superior shift correction package.

NEW 1650 RPM Stock-Stall Lock-Up Torque Converter Included.

🔧 TWISTED STREET™ GRAND NATIONAL BUILD

PREMIUM FRICTIONS & STEELS

• Premium high-energy friction clutches
• New steels
• Factory Street clutch configuration retained
• Clutch clearances checked and set

BRF-TYPE VALVE BODY

• BRF-type Grand National valve body
• Turbo Buick / Grand National calibration
• Stage 1 mild TransGo or Superior shift correction kit
• Accumulator system serviced
• TV circuit checked
• Pressure circuits checked
• TCC circuit serviced
• Full automatic operation retained

REBUILT & UPDATED PUMP

• Pump completely disassembled and inspected
• New pump bushing
• Hardened pump rings
• Pump vanes inspected/replaced as required
• Pump slide and related components inspected
• Pressure regulator and boost circuits checked
• Pump clearances checked and set

INTERMEDIATE BAND & SERVO

• New intermediate band
• Factory-style servo serviced
• Servo travel checked
• Band clearance checked and set

COMPLETE INTERNAL BUILD

• New friction clutches
• New steels
• Complete bushing kit
• New sealing rings
• New lip seals
• New gaskets and seals
• New filter
• Rebuilt and updated pump
• Sprags and one-way clutches inspected/replaced as required
• Bearings and thrust components inspected/replaced as required
• Forward drum and shaft inspected
• Input shaft inspected
• Front and rear planetaries inspected
• OD carrier and ring gear inspected
• Sun shell and reaction components inspected
• Clutch clearances checked and set
• Internal endplay checked and set

Hard parts that do not pass inspection are replaced.

TV CABLE SETUP

The TV cable is not a kickdown cable.

Correct TV cable adjustment is required on the 200-4R. TV pressure and cable operation must be checked during installation.

1650 RPM LOCK-UP CONVERTER INCLUDED

Includes a NEW 1650 RPM stock-stall lock-up torque converter for the Street Grand National application.

Higher-stall converter options are available for modified combinations.

APPLICATION

1986–1987 Buick Grand National

• 3.8L Turbo V6
• 200-4R automatic
• BRF-type valve body/calibration
• Lock-up converter
• Street performance applications up to 350–450 HP

This listing is for the Grand National application.

BUILT TO ORDER

Provide:

• Vehicle year
• Engine combination
• Estimated horsepower
• Boost level
• Turbo size/modifications
• Fuel system modifications
• Rear gear ratio
• Rear tire size
• Intended use

200-4R GEAR RATIOS

1st: 2.74

2nd: 1.57

3rd: 1.00

4th: 0.67 Overdrive

FINAL BUILD CHECK

• Clutch clearances set
• Servo travel checked
• Endplay set
• Air checked during assembly
• Line pressure checked
• Final pressure test before shipping