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B&M 20485 High Performance Torque Converter for TH350 Transmission

(GMC G2500 1979-91, Sonoma 1991, K1500 1979-86, 1988-91, C1500 1979-86, 1988-91, K2500 1979-86, 1988-91, Jimmy 1970-91, C3500 1979-86, 1988-91 + 279 more models)

Manufacturer

Picture for manufacturer B&M

Part Number

20485
7 reviews
Sale Price

$675.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The B&M 20485 is a high-performance torque converter designed specifically for 1965-1981 TH350 automatic transmissions. Engineered for enhanced acceleration and durability, this converter delivers improved performance for street machines, hot rods, and performance vehicles equipped with the popular Turbo 350 transmission.

Key Features:

  • Steel alloy pump drive tube for maximum strength and reliability
  • Furnace brazed impeller and turbine construction ensures secure bonding under high-stress conditions
  • Anti-balloon plate adds structural rigidity and prevents flex at high RPM
  • Fully balanced and pressure tested for smooth operation and quality assurance
  • Needle bearing between stator and turbine reduces friction and heat buildup
  • Higher stall speed provides quicker acceleration and improved launch characteristics
  • Dual bolt pattern accommodates both 10.75-inch and 11.50-inch bolt circles for broad compatibility

Built with B&M's legendary quality and durability, this torque converter is an excellent upgrade for TH350-equipped vehicles seeking improved performance without sacrificing reliability. The precision engineering and premium materials ensure consistent performance under demanding conditions.

Products specifications

Fits

GMC G2500 1979-91, Sonoma 1991, K1500 1979-86, 1988-91, C1500 1979-86, 1988-91, K2500 1979-86, 1988-91, Jimmy 1970-91, C3500 1979-86, 1988-91, K2500 Suburban 1979-86, K3500 1979-86, 1988-91, C15/C1500 Pickup 1967-74, Safari 1985-91 + 275 more models

Additional Contents

New needle bearings

Anti-Balloon Plate

Yes

Automotive Item Grade

High Performance

Bolt Circle Diameter (in)

10.75

Brand

B&M

Prop 65

No

Category

Transmission

Crank Pilot Diameter (in)

1.71

Emission Code

5

FlexPlate Bolt Circle

10-3/4", 11-1/2"

Flexplate Change Needed

No

Furnace Brazed

Yes

Grade Type

Performance

Input Spline

30

Lock Up Type

No

Lockup

No

Material

Steel

Mounting Studs

No

Product Type

Automatic Transmission Torque Converter

Spline Quantity

30

Stall

3500-3800

Stall Speed

3,500-3,800

Sub Category

Transmission Hard Parts

Torque Converter Series

Nitrous Holeshot

Transmission

TH400

Transmission

TH425

Transmission

TH350

Transmission

TH375

Transmission

TH375B

Transmission Model

TH400, TH425, TH375, TH350

everything was great thanks

Very quick and best price including shipping recieved the correct items the first time.Thanks

no

Connection with Amazon is great

found the part I needed quick and at the best price Thanks

It gives you option to pay with paypal. Ive never had to type account # usually it just lets me cash out through them. It wouldnt let me. 1st time ever I had this problem. Frustrating

linked with Amazon account smoothly

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