TRANSMISSION
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TRANSMISSION

Built to Handle the Power

When you add power, you need a transmission that can handle it. From valve body upgrades to full built transmissions.

OVERVIEW

Add power and the transmission quickly becomes the weak link. We build and service Allison, TorqShift, and Aisin units to hold the torque you are actually making — valve body work, clutch and converter upgrades, and calibration that keeps shifts firm under load without making the truck miserable to drive empty.

We also handle routine transmission service with the correct-spec fluid and filters, and add external cooling for trucks that tow heavy in Texas heat.

WHAT'S INCLUDED
RebuildComplete transmission rebuilds
Valve BodyShift kit & valve body upgrades
Torque ConverterHigh-stall performance converters
CoolerExternal transmission coolers
TuningTransmission calibration
HOW IT WORKS

Our Process

01

Diagnosis

Datalog and pressure testing to see exactly where the unit is slipping or lazy.

02

Build Plan

We size the build to your power level and towing duty — no overkill, no weak links.

03

Build or Service

Rebuild, upgrade, or service with correct-spec fluids and documented clearances.

04

Calibration

Shift strategy tuned and road tested under load before delivery.

READY TO SCHEDULE?

Send us your vehicle details and we'll confirm availability and pricing for transmission.

REQUEST SERVICE

VISIT US

1121 West Market Street
Rockport, Texas 78382

Mon–Fri: 9AM–5PM

PLATFORMS

CUMMINSDURAMAXPOWER STROKETITAN
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⚠ DISCLAIMER: All performance tuning products and services are intended for off-road use only. Use on public roads may be illegal under federal and/or state emissions regulations. By purchasing, you accept full responsibility for compliance with applicable laws. All deposits and tuning part purchases are non-refundable. Express Diesel Performance LLC is not responsible for any mechanical failures resulting from tuning modifications.

Express Diesel Performance

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