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Heavy Duty Applications

Additional Strength Upgrades

If you’re towing heavy loads or your engine makes over 400 horsepower we also recommend "Billet" input shafts and hubs. These components are made from much stronger steel then the factory components. 

Upgraded Valve Bodies

The lube circuit of the valve body is modified such that there is always line pressure feeding the lube circuit. With the factory valve body, when the transmission gets hot, you may lose oil to the lube circuit while decelerating downhill if the engine is at low rpm or idle. With our upgraded valve body this will not happen. 

Our valve body has increased pressures starting at 60-75 psi at idle and up to 150-175 psi at wide open throttle. A factory valve body has pressures of 50-60 psi at idle and 85-95 psi at wide open throttle. 

This valve body is capable of lockup in 2nd through 4th or optionally, all forward gears. If 1st through 4th lockup is desired a toggle switch can be added.   A manual lockup switch is used with an exhaust brake or to keep transmission temperatures down while towing uphill. 

Please note that we do not recommend letting the transmission shift from one gear to the next while the converter is locked. 

The valve body comes complete with all solenoids. The governor solenoid is a new borg warner solenoid - or the customer can upgrade to the GM solenoid for an extra $10000

When using a new valve body a stronger 1-2 shift lever is also recommended. The higher pressures may break the stock lever.


For the current prices on these items please see our Dodge Diesel Parts and Allison Parts.