# Performance Transmissions & Torque Converters | Gearstar
> converters for GM, Ford and Mopar builds. One technician per unit, dyno tested before it ships.

## Product Categories
- [Performance Transmissions | GM Ford and Mopar Power](https://gearstar.com/transmissions/): Browse performance transmissions for GM, Ford and Mopar cars, each crafted by one technician to match your horsepower goals and driving style.
- [Transmission Parts and Accessories | Gearstar](https://gearstar.com/parts/): Shop performance transmission parts and accessories including torque converters, controllers, flexplates, dipsticks, and adapters. Order online today.
- [Automotive Gifts | Gearstar](https://gearstar.com/gifts/): Shop official Gearstar apparel and merchandise for automotive enthusiasts and transmission builders. Find the ideal automotive gift for your build today.
- [Complete Engine Assemblies | BluePrint Crate Engines](https://gearstar.com/engine-complete-assembly/): Shop complete BluePrint crate engine assemblies for high performance street and strip applications. Find your exact horsepower and torque specifications today.

## Featured Products
- [AOD Level 2 Transmission | 2WD 400HP Overdrive](https://gearstar.com/ford-aod-performance-transmission-2wd-level-2/): Built AOD Level 2 2WD transmission rated to 400 HP featuring a custom billet converter, Raybestos frictions, and dyno testing. Configure your build today.
- [TH400 Level 2 Transmission | 550 HP 2WD](https://gearstar.com/chevrolet-th400-performance-transmission-2wd-level-2/): Gearstar built TH400 Level 2 2WD transmission handles up to 550 horsepower. Includes a custom torque converter and shift kit. Order yours today.
- [700R4 2WD Level 3 Transmission | Hot Rod Ready Box](https://gearstar.com/chevrolet-700r4-performance-transmission-2wd-level-3/): Maximize your hot rod's potential with a custom-built 700R4 2WD level 3 transmission. Engineered for superior shifting, strength, and raw track power.
- [700R4 4x4 Level 2 Transmission | Firm Trail Shifts](https://gearstar.com/chevrolet-700r4-performance-transmission-4x4-level-2/): Equip your off-road rig with a beautifully engineered 700R4 4x4 level 2 transmission. Delivering reliable torque management and smooth trail shifting.
- [Chevrolet 4L60E Level 3 Transmission | 2WD, Dyno Tested](https://gearstar.com/chevrolet-4l60e-performance-transmission-2wd-level-3/): Chevrolet 4L60E Level 3 2WD transmission tuned for daily use and towing. Dyno tested, built to order, see specs, upgrade options, and current lead times.
- [TH350 Transmission Level 2 | 2WD 400 HP](https://gearstar.com/chevrolet-th350-performance-transmission-2wd-level-2/): This Chevrolet TH350 Level 2 2WD performance transmission handles up to 400 horsepower for classic street builds. Order your dyno tested transmission today.
- [4L80E 2WD Level 2 Transmission | Rated Up To 500HP](https://gearstar.com/chevrolet-4l80e-performance-transmissions-2wd-level-2/): Upgrade your vehicle's performance with a premium 4L80E 2WD level 2 transmission. Hand-built by experts for extreme durability and heavy-duty towing.
- [4L80E Level 4 Transmission | Extreme GM Performance](https://gearstar.com/gm-4l80e-performance-transmission-level-4): High strength 4L80E Level 4 transmission engineered for extreme horsepower builds with premium internal upgrades and dyno-tested reliability.
- [Mopar 727 Level 3 Automatic Transmission](https://gearstar.com/mopar-727-performance-transmission-2wd-level-3/): Performance-oriented Mopar 727 level 3 automatic transmission for 2WD builds, featuring internal upgrades and premium components for consistent shifts.
- [Ford 4R70W Performance Transmission Level 3 | Gearstar](https://gearstar.com/ford-4r70w-performance-transmission-level-3/): Get a high-performance Ford 4R70W Level 3 transmission built for up to 500 HP with strong durability and reliable performance for street and race use.

## Product Catalog
- [Machine-readable product catalog](https://storage.googleapis.com/bc-index-now.firebasestorage.app/lsy2gbmvwa/product-feed/products-1.jsonl): Updated every twelve hours.

## Company
- [About Us](https://gearstar.com/about-us/)

## Customer Support
- [Contact](https://gearstar.com/contact/)
- [Support](https://gearstar.com/support)

## Shopping Tools
- [RPM calculator](https://gearstar.com/rpm-calculator/)
- [Calculators](https://gearstar.com/calculators/)

## Guides and Resources
- [Blog - Gearstar Performance Transmissions](https://gearstar.com/blog/)

Last updated: 2026-09-05T03:04:21.659Z