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Super Duty trucks were offered with two transfer case shift setups: a manual lever on the floor, or electronic shift-on-the-fly with a dash knob or buttons. On the electronic trucks, a motor on the back of the transfer case turns the shift shaft into 2HI, 4HI and 4LO. A module commands it and reads its position.
The motor sits right behind the case, low on the truck, and these trucks work for a living. Road salt, water, mud and plowing all find it. Corrosion at the connector and inside the motor are the usual failures. The case itself is rarely the problem.
Which Motor Does Your Truck Use?
| Truck | Motor | Notes |
|---|---|---|
| F-250, F-350, F-450, F-550 Super Duty 1999-2016 | 600-805 | Electronic shift only |
| Ford Excursion 2000-2005 | 600-805 | Electronic shift only |
| F-250, F-350 2017-2022, 6.2L gas | HC3Z-7G360-A | Also replaces HC3Z-7G360-B, LC3Z-7G360-A |
| F-250, F-350 2017-2024, 6.7L Power Stroke | HC3Z-7G360-A | Triangular output shaft, 7-blade plug |
| F-250, F-350 2020-2024, 7.3L gas | HC3Z-7G360-A | Same motor as the 6.7L |
If you are not sure which transfer case is under your truck, our transfer case tag guide shows where to look. The older trucks mostly run the BorgWarner 1356 case, covered in our BW1356 problems guide.
Symptoms
- Stuck in 2WD. You select 4HI, the light flashes, and the front never engages.
- Stuck in 4WD. It went in and will not come out. You feel binding and tire scrub in turns on pavement.
- 4X4 fault message on newer trucks, or a selector showing a mode the case never reached.
- Works when warm, fails when cold or wet. Classic corrosion behavior.
- Blown 4x4 fuse that keeps blowing. A motor binding internally can pull too much current.
The front hubs matter too. Many Super Duty trucks have hubs that lock with vacuum in auto mode. If the case shifts but the front wheels are not driving, check the hubs. Our Super Duty vacuum hub lock guide walks through that system. Turning the manual hubs to LOCK is a quick way to tell whether the problem is at the hubs or at the case.
How to Test the Motor
1. Fuses and connector
Check the 4x4 fuses and relay. Then unplug the motor and inspect the connector. Green corrosion and water in the plug are the most common finds on trucks from the salt belt.
2. Bench test (2017-up motor)
The 2017-up motor can be tested off the truck. Face the triangular output shaft and put 12 volts DC across terminals 1 and 2. The motor should turn. Reverse the polarity and it should turn the other way. If it is dead, slow, or stalls under light hand resistance, replace it.
3. Power at the plug (1999-2016)
On the older trucks, back-probe the connector and turn the selector. If the module sends power and the motor does not move, the motor is bad. If nothing arrives, follow the wiring back toward the module and the dash switch.
4. Scan the 4x4 module
A scan tool that reads the 4x4 control module will show codes for the motor circuit and position sensor. On 2017-up trucks it is especially worth doing, because the module will tell you exactly which circuit it is unhappy with.
What It Costs
| Option | Typical Cost | Notes |
|---|---|---|
| Dealer, Ford motor | Often $600 to $1,000 | Diagnosis plus OEM part |
| Independent shop, new aftermarket | Roughly $300 to $450 | About an hour of labor |
| DIY, 1999-2016 (600-805) | About $192 | A few bolts and a plug |
| DIY, 2017-up (HC3Z-7G360-A) | About $202 | Bench test the old one first |
Replacement Tips
- Match the shift shaft to the motor. New motors come indexed to a specific position, and the 600-805 ships indexed to 4HI. Read the instructions with the motor and rotate the case shift shaft to that same position before installing.
- Disconnect the battery before unplugging anything.
- Clean the mounting face and inspect the shift shaft seal. A leaking seal is cheap now and annoying later.
- Do not use the bolts to pull the motor into place. If it does not seat by hand, the motor and shaft are not lined up.
- Seal the connector with dielectric grease. That is how the original failed.
- Test every mode on gravel or wet grass, not dry pavement.
If a new motor shifts the case but you still have noise or the case jumps out of 4LO under load, the problem is internal. See our popping out of 4 low guide. On plow trucks, also look at the fluid. A case that has been run hard and low on fluid will chew up its chain and bearings.
Super Duty Shift Motors Ship Same-Day
1999-2016 trucks: 600-805. 2017-up F-250 and F-350: HC3Z-7G360-A. Both new units with sealed connectors. CoreTransmissionParts carries the transmission side.
Shop the 1999-2016 Motor → Shop CoreTransmissionParts →FAQ
Why will my Super Duty not go into 4WD?
On electronic-shift trucks, the most common causes are a failed shift motor, a corroded motor connector, a blown 4x4 fuse, or front hubs that are not locking. Lock the manual hubs to rule them out, then check the fuse and the motor.
Is the 2017 Super Duty shift motor the same as the 2016?
No. 1999-2016 Super Duty trucks and the 2000-2005 Excursion use the 600-805 motor. 2017-up F-250 and F-350 trucks use HC3Z-7G360-A, which also replaces HC3Z-7G360-B and LC3Z-7G360-A.
How do I bench test a 2017-up Super Duty shift motor?
Face the triangular output shaft and put 12 volts DC across terminals 1 and 2. The motor should turn. Reverse the polarity and it should turn the other way. A dead or weak motor needs replacement.
How much does a Super Duty transfer case shift motor cost?
A new aftermarket motor is about $192 for 1999-2016 trucks and about $202 for 2017-up trucks. Independent shops typically charge around $300 to $450 installed. Dealer jobs often run $600 to $1,000.
Does my Super Duty have a shift motor if it has a floor lever?
No. Trucks with a manual floor shift lever for the transfer case do not use a shift motor. The motor is only on electronic shift-on-the-fly trucks.