Part Number

Outside Diameter

Year

Crank Flange Bolt Pattern

Clutch Diameter

Starter Ring Gear Teeth

Notes

14085720

12-3/4"

1955-85

3.58"

10.4"

1 5 3

Lightweight nodular iron flywheel. Weighs approximately 15 pounds. For two-piece crank seal.

3986394

14"

1970-80

3.58"

11"

1 6 8

For externally balanced 400ci small-block V8 only. Use with balancer P/N 6272225.

3991469

14"

1955-85

3.58"

10.4", 11"

1 6 8

For two-piece crank seal.

10105832

1 4 "

1986-up

3.00"

11", 11.85"

1 68

For one-piece crank seal.

14088646

12-3/4"

1986-up

3.00"

10"

1 5 3

Lightweight nodular iron flywheel. Weighs approximately 16 pounds. For one-piece crank seal.

14088650

12-3/4"

1986-up

3.00"

10.4"

1 5 3

Standard weight flywheel for one-piece crank seal.

Part

Outside

Crank Flange

Converter

Starter Ring

Number

Diameter

Year

Bolt Pattern

Bolt Pattern*

Gear Teeth

Notes

471598

14"

1970-85

3.58"

10.75", 11.50"

1 6 8

For internally balanced engine with two-piece crank seal.

471578

14"

1970-80

3.58"

10.75", 11.50"

1 6 8

471529

123/4"

1969-85

3.58"

9.75", 10.75"

1 5 3

For internally balanced engine with two-piece crank seal.

14088765

123/4"

1986-up

3.00"

10.75"

1 53

For one-piece crank seal. Used with 5.7-liter HO engine.

12554824

1 4 "

1986-up

3.00"

11.50"

1 68

Heavy-duty flexplate with increased thickness for one-piece crank seal.

14088761

1 4 "

1986-up

3.00"

10.75", 11.50"

1 6 8

For one-piece crank seal.

Torque converters for TH350 and TH400 transmissions are produced with both 10.75" and 11.50" diameter converter bolt patterns. To identify the correct pattern, measure from the converter center to an attaching bolt hole and then multiply this dimension by 2.

Shop GM Parts | Directory | View Cart | About Us | Contact Us | Your Account | Order History | Check Out | Search Shop
Crate Motors | Crate Engines | Charts | Resources | Privacy Policy | Warranty Information | Terms and Conditions | Back Home
Add Your Link To CrateEngineDepot.Com | Testimonials