'15-'17 Mustang TH400 Swap (Stage 2) | Next Gen Performance

Next Gen Performance Stage 2 TH400 Swap Package (2015–2017 Mustang GT)

At Next Gen Performance, we make transmission swaps easy. Normally, these projects involve endless guesswork, incorrect parts, and heavy fabrication. With years of in-house installation experience, our team has developed complete, proven swap packages that eliminate the hassle and take out all the guesswork.

Our Stage 2 TH400 Package includes a TH400 built by Proformance Race Transmissions, rated for 1200+ horsepower.
This unit is built for serious racers and includes:

• Transbrake valve body

• Direct drum modified for instant transbrake release

• Pro Mod drum

• Clutch packs and end play clearance optimized for “low drag”, friction-free performance

Package Includes:

• Proformance TH400 Transmission

• Neal Chance Torque Converter – custom spec’d to your application

• SFI Flywheel (8-bolt)

• SFI Bellhousing (pre-mated to transmission)

• Flexplate Bolts

• Transmission Mount

• B&M Transmission Cooler with fittings and 20 ft of cooler lines

• Hurst Shifter

• Custom PST Driveshaft with billet yoke

• Lokar Dipstick

• ARP Converter Bolts

• All required adapters and installation hardware included

Optional Add-On:

Upgrade your setup with an AEM X-Series Transmission Temperature Gauge for precise, real-time temperature monitoring. These gauges offer cutting-edge functionality and style, including:

• Auto-dimming sensor for optimal brightness

• 87% larger programmable center LED

• Standard or metric readout (100–300°F / 40–150°C)

• User-selectable warning thresholds

• Peak/recall via gauge face buttons

• AEMnet CANbus-enabled for EMS or data logger

• 0–5V analog outputs for EMS/data logging

• 33% larger gauge display for enhanced visibility

• Standard 2-1/16" (52mm) diameter housing

• Ultra-slim 0.825" depth for flexible mounting

• Positive locking connectors for secure installation

Approximate Build Time: 2–3 weeks