10 in. Breakaway Torque Converter GM 4L80E Lock-up

Vehicle Info Needed

TCIPART NUMBER: 890-242948

10 in. Breakaway Torque Converter GM 4L80E Lock-up

Name: 10 in. Breakaway Torque Converter GM 4L80E Lock-up
Brand: TCI
SKU: 890-242948
Price: 1399.95 USD
Availability: InStock

^$1,399⁹⁵

Ships on 10/19/2026

Lowest Price Guarantee

10 in. Breakaway Torque Converter

1991-1996 GM 4L80E

2400-2600 RPM Stall

With Lock-up

This Breakaway Torque Converter provides between 2400 to 2600 RPM flash stall without negatively affecting part-throttle driving. TCI has engineered these Breakaway Torque Converters to be efficient at highway cruising speeds and to launch hard at wide-open throttle.

Features:

Furnace-brazed fins
Needle bearings
Hardened, pre-ground pump hub
Computer Balanced
Installed Hardware Included

Benefits:

Harder launches
Quicker acceleration
Improved low-end power
Bolt-in (no modifications required)

1000+ RPM increase in stall over stock

Street/Strip Performance Torque Converter General Application Chart
Torque Converter Series	advertised camshaft duration	rear gear ratio	engine characteristics	expected rpm stall speeds
Torque Converter Series	advertised camshaft duration	rear gear ratio	engine characteristics	*small block*	*big block*
Street Rodder	stock to 260°	stock to 3.23	smooth idle, stock comp. ratio	1500 to 1700	1700 to 1900
Saturday Night Special	stock to 265°	stock to 3.23	smooth idle, stock comp. ratio	1600 to 1800	1800 to 2000
Breakaway	265° to 280°	3.00 to 3.73	fair idle, mild modifications	2200 to 2400	2400 to 2600
StreetFighter	280° to 300°	3.55 to 4.56	rough idle, large fuel system, raised comp. ratio	3000 to 3400	3400 to 3600
Super StreetFighter	280° to 310°	3.73 to 4.88	rough idle, large fuel system, raised comp. ratio top end power	3500 to 3800	3800 to 4000
Ultimate StreetFighter	290°+	3.73+	1000+ horsepower with power adders	3500+	3800+

A Torque Converter for Your Street Machine

TCI Breakaway Torque Converters are great for moderately modified street machines, weekend racers, and daily drivers.

Part TypeAutomatic Transmission Torque Converter

Product LineTCI Breakaway Torque Converters

BrandTCI

Package Height7.5

Package Width14.0

Package Length15.0

Weight37.735 PG

Part CategoryPerformance Parts

Anti-Ballooning PlateNo

Hardware IncludedYes

Trans Model4L80E

BalancedYes

Furnace-BrazedYes

QuantitySold individually

Part FitmentSemi Universal

LockupYes

Diameter10 in (254 mm)

Vendor Part Number242948

Package Qty1

Package TypeEA

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Please click here to download the instructions PDF file

Some parts are not legal for use in California or other states with similar laws / regulations

10 in. Breakaway Torque Converter GM 4L80E Lock-up

Features:

Benefits:

A Torque Converter for Your Street Machine

⚠️ Warning

Motor Vehicles

Tools

Electrical Cords