🔥⚙️ TWISTED PRO DIESEL™ 4L80E TRANSMISSION

450–600 HP HD TOWING & PERFORMANCE BUILD

The Twisted Pro Diesel™ 4L80E is built for upgraded diesel trucks, heavier towing, work-truck use, RVs, larger tires, and drivers who need more holding power than our Street build.

The Pro adds stronger clutches and steels, increased clutch pressure, added direct-clutch holding power, and a Super Duty low-stall converter with a one-piece billet cover.

🔥 POWER & USE

✔ 450–600 Horsepower

✔ Upgraded diesel engines

✔ Heavy-duty towing and hauling

✔ Work trucks and RV applications

✔ Larger tires and added vehicle weight

✔ Firm, controlled street shifts

Final rating depends on engine torque, vehicle weight, tuning, gearing, towing load, and operating temperature.

⚙️ COMPLETE PRO DIESEL BUILD

🔧 COMPLETE MASTER OVERHAUL KIT

New gaskets, seals, sealing rings, bonded pistons, bushings, bearings, thrust washers, and wear items.

This restores proper sealing, oil control, and internal clearances.

🔥 HIGH ENERGY HD TWISTED™ CLUTCHES & STEELS

Our High Energy HD Twisted™ clutch and steel package is set up for increased holding power and better heat control under diesel torque and towing load.

New steels give the clutches a clean, flat surface to apply against.

🔥 INCREASED DIRECT-CLUTCH HOLDING POWER

The direct clutch is set up for added holding power during high-load operation.

This helps prevent clutch slip and failure during towing, heavy throttle, and repeated loaded shifts.

🔥 HEAVY-DUTY INTERMEDIATE BAND

A new wide heavy-duty band provides stronger holding power and better durability under load.

🔥 UPDATED 34-ELEMENT INTERMEDIATE SPRAG

The updated sprag is stronger than early factory designs and helps prevent sprag and intermediate clutch failure.

⚙️ TRANSGO HD SHIFT PACKAGE

The TransGo HD system improves clutch pressure, shift timing, and converter control.

It gives the transmission firm, controlled shifts without turning it into a harsh race transmission.

🔧 PRO VALVE BODY — TWISTED TORQUE™ SPEC

The valve body is taken apart, cleaned, inspected, and checked for worn valves and pressure loss.

Worn areas are repaired as needed to improve line pressure, clutch apply, shift timing, and converter lockup.

🔥 SONNAX UPDATES

Sonnax valves and sleeves are used where wear is found in the pressure, boost, oil-feed, and converter circuits.

These repairs help prevent low pressure, clutch slip, delayed engagement, and converter lockup problems.

🔧 HIGH-PRESSURE PUMP BUILD

The pump is inspected and set up for increased pressure, proper converter feed, cooler flow, and lubrication.

Hardened pump rings and recommended pump updates improve pressure control and reliability under load.

🔧 CENTER-SUPPORT UPDATE

The center support and retaining hardware are inspected and updated to help prevent movement inside the case.

🔧 NEW INTERNAL ELECTRONICS

New EPC solenoid, shift solenoids, TCC solenoid, internal wiring harness, and applicable sensors are installed.

This removes old electrical parts that commonly cause pressure, shifting, and converter lockup problems.

⚙️🔥 LOW-STALL SUPER DUTY BILLET-COVER CONVERTER INCLUDED

✔ Low-stall diesel setup

✔ Super Duty internal build

✔ Factory front cover replaced with a one-piece billet cover

✔ Improved strength under diesel torque and towing load

✔ Smooth street engagement

✔ Matched to the engine, vehicle, and intended use

The one-piece billet cover provides a stronger connection at the engine and helps prevent cover flex under heavy load.

🔥 WHY STEP UP FROM STREET?

The Twisted Street Diesel™ is built for stock and mildly upgraded trucks with lighter towing needs.

The Twisted Pro Diesel™ is built for more power, more weight, and more work.

✔ High Energy HD Twisted™ clutches and steels

✔ Increased direct-clutch holding power

✔ TransGo HD shift package

✔ Higher clutch pressure

✔ High-pressure pump build

✔ Stronger valve-body setup

✔ Low-stall Super Duty billet-cover converter

✔ Built for heavier towing and upgraded diesel engines

🚗 COMMON APPLICATIONS

✔ Chevrolet and GMC diesel trucks

✔ Chevrolet and GMC diesel vans

✔ Upgraded 6.2L and 6.5L diesel applications

✔ Hummer H1 diesel applications

✔ RV and motorhome applications

✔ Diesel conversions using a GM 4L80E

✔ Two-wheel-drive and four-wheel-drive builds

Every transmission is built to order for the vehicle, engine, and intended use.

🚚 SHIPPING

Freight is calculated separately based on destination and delivery requirements.

Residential, liftgate, limited-access, and special-delivery fees may apply.

📞 NEED HELP? LET’S BUILD IT RIGHT

📞 833-858-9612

🌐 TwistedTorque.com

BUILT FOR TORQUE. BUILT FOR WORK. BUILT TWISTED.