ATO Super Heavy Duty 4R100 Automatic Transmission
ATO Enhancements for Towing Durability and Performance Include:
New OEM Solenoid Pac, New Front Pump, 4140 High Strength Steel Forward Clutch Drum,
41 Element HD Intermediate Sprag, all Thrust Bearing Low Drag Planetaries, all Clutch
Pacs Improved and Enhanced, New OEM Low and Overrun Sprags, Valve Body
Enhancements by ATO are set to each Truck by Horsepower Torque and Type of Use.

Optional Upgrades Include: Deep Aluminum Oil Pan, Billet Steel
Intermediate Shaft, Billet Steel Input Shaft, Billet Steel Output Shaft.




C-6/E40D/4R100 Billet Steel Forward Clutch Drum
Designed specifically for Big Blocks and Diesel Trucks. Replaces Factory Cast Iron Clutch Drum.
Manufactured from 4140 Heat Stress Relieved Steel for Ultimate Strength.




ATO puts Quality Control into every Unit we build, from Front to Back,
Inside and Out, in our Clean Assembly Room.

All parts are carefully cleaned and prepared with all necessary machining
needed to build a ATO Super Heavy Duty 4R100 Ford F-250/F350 Transmission.




ATO Competition C-4/C-5 Automatic Transmission
Automatic Transmission Built For Heavy Off Roading or Full Competition. The Super
Heavy Duty (SHD) is built specifically for your application and performance needs.
ATO SHD C-5/C-4 Transmissions are redesigned to provide Optimum Performance
through a Unique Low Drag Planetary System and Improved Lubrication for Longevity
and Lower Transmission Temps. ATO C-5/C-4 Transmissions are built with Automatic
or Full Manual Reverse Pattern Valve Bodies. Also available with Billet Steel
Forward and Direct Clutch Drums and Input Shaft.




C4/C5 Combo Set
Billet Steel Forward Clutch Drum machined from 4140 HTSR Billet Steel for Optimum
Strength and Durability for Drage Racing and Off-Road Competition. Drum supplied
with .090 thick Pressure Plate and Needle Thrust Bearing. Drum Can Accommodate 5 Frictions

Billet Input Shaft made from 300 Maraging Steel with Superior Fatique and Fracture Resistance.
Shaft fits 1970 and Up Forward Drums with 24/26 Combination.



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