Ford F-250: Why Won't My Truck Reverse?

The good news is that the culprit is generally a worn out shifter. The bad news is that you might have to rebuild or replace the entire unit if the internals are damaged. Figure out which side of the fence your truck falls on below.

By Brett Foote - November 18, 2014

This article applies to the Ford F-250, F-350 and Super Duty trucks (2004-2014).

Transmission problems, like most vehicle issues, tend to pop up at the most inopportune times. One of the worst happens when your reverse gear refuses to cooperate.

Usually that one goes bad on you at the precise moment you need to back up. Thankfully, this typically isn't a tough problem to fix. If your Super Duty won't shift into reverse, we've laid out some easy steps to help you diagnose and fix the problem and get you out of that tight spot.

Tools Needed

  • Code reader
  • Jack and jack stands
  • Pressure gauge
  • Socket and wrench set

Step 1 - Check for transmission codes

Use a OBD scanner to check your Super Duty's engine computer for diagnostic trouble codes. A sophisticated code scanner can tell you what the code means immediately. Generally speaking, the codes will direct you towards a system or component that's failing. Another option is check the engine codes against a service manual or Ford-Trucks.com's forum pages.

A truck that can't reverse will most likely have some transmission related error code stored. That code should point you to the component that is preventing the truck from going into reverse. A bad shift solenoid, for example, is a common problem that can keep your truck to be unable to shift into reverse.

Figure 1: Solenoids on a 5R110 transmisssion.

If you have no codes, move on to step 2.

Step 2 - Check selector lever cable

The gear selector in your truck is connected to the transmission via a cable. The shift cable goes from the transmission range sensor on the side of the transmission up into the steering column. You can see where the cable connects to your steering by looking underneath your steering wheel. You might have to remove some plastic shrouds to get to it.

If the selector lever linkage is damaged, replace it. If your truck has trouble shifting into other gears, it may simply need to be adjusted. Make sure the two bolts in the photo below are tight.

  • Figure 2. Ford F-250 Shifter Cable Diagram
  • Figure 3. An example of a gear selector in a Ford Super Duty.

If your bolts are tight and there is no problem with your linkage, move on to step 3.

Step 3 - Check transmission fluid

Pull the transmission dipstick while your transmission is still warm. Let it drip on white paper. If the fluid smells burnt or isn't pink, replace it. If the fluid appears frothy or has a milkshake like consistency, there is water or coolant in it.

Figure 4. Old transmission fluid vs. new fluid.

Also, check to be sure your transmission has enough fluid. The transmission fluid dipstick is labeled as such under the hood. Check it's level after the transmission is warmed up if you want an accurate reading.

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If your fluid looks good, move on to step 4.

Step 4 - Test transmission pressure

Connect a transmission fluid pressure gauge to your EPC tap. Follow the pressure test diagnostic in your manual to identify possible problems. If pressure is lower than recommended, it can be an indication of a bad solenoid or other potential problems that would prevent your transmission from shifting into gear, including bad internal transmission clutches or a bad fluid pump.

  • Figure 5. Pressure taps on 4R7 Transmission
  • Figure 6. Line pressure tap on the 5R110W (Diesel 5-speed automatic)
  • Figure 7. Line pressure tap on the 6R140 (Diesel 6-speed automatic)

Pro Tip

Of course, there are also internal transmission problems that can result in a truck with no reverse. The reverse servo might have broken or the reverse band might have snapped. Big damage like that will generally create an engine code that you'd see in Step 1.

These things can be handled by a person with a lot of transmission experience, but your average weekend mechanic will not. Take it to trusted transmission mechanic for internal repairs.

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