F150 F20 F350 F450 F550 PSOM REPLACEMENT E150 E250 E350 E450 BRONCO
F150 F20 F350 F450 F550 PSOM REPLACEMENT E150 E250 E350 E450 BRONCO
PSOM Square wave test

1992-1997 PSOM Replacement Ford F150 F250 F350 F450 F550 BRONCO E150 E250 E350 E450


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Your PSOM could be defective if you are experiencing any of the following symptoms;

  • Harsh / delayed transmission shifts
  • Rough shifting sending transmission into limp mode
  • Code 452 stored in memory
  • Over drive light flashing on shifter
  • Speedometer completely dead
  • Odometer screen is blank / not showing numbers
  • Odometer or speedometer intermittently working
  • Odometer reads ERROR
  • Needle drops to 0 after a certain speed has been reached
  • Speedometer needle wavers erratically
  • Speedometer needle not calibrated
  • Rough idle
  • Transmission dropping in and out of neutral
  • ABS light on
  • Transmission in and out of limp mode

Our rebuilt PSOM can help solve your issues! 

Each unit is fully rebuilt and tested thoroughly.

Mileage / Kilometer and tire calibration included!

With thousands of units repaired by us, we’ve been the #1 PSOM rebuilder for years and come recommended on several forums.

Hassle free 2-year warranty. (Optional 5 year available)

Priority shipping and handling. (Expedited shipping and 24 hour handling option available)

$60 core refund offered with return shipping label included in packaging.

Odometer and tire calibration included.

PSOM will come fully programmed with 6 tire calibration attempts remaining, same as factory settings.

Compatible with both diesel and gasoline engines.

Tire size in METRIC format and desired odometer reading will be required.

Please include this information in the order note box during checkout or email after order is placed.

Metric Tire Size Example: 235/70R16

Tire size and desired odometer reading is required to calibrate the PSOM and cannot be shipped without receiving this information.

If your odometer is in kilometers, please inform us of this otherwise U.S. miles will be assumed.

Please keep in mind, desired odometer reading may vary within +/- 900 miles / km.

Core returns that are badly burnt or corroded may not be accepted depending on condition.

Expedited shipping and handling option applies to business days only.

If preferred, you may send the Tire CAL code on the PSOM instead of the tire size using the instructions below.

If you are interested we have a (repair service) for this PSOM.

We also have (replacement odometer LCD displays) and (full clusters with PSOM) available.

Technician’s notes

The Programmable Speedometer Odometer Module a.k.a. the PSOM – located inside your instrument gauge cluster attached behind the speedometer – is responsible for converting the vehicle speed sensor (VSS) into a square wave. This wave instructs the computer when to shift the transmission. When the PSOM is defective due to aging components, corrosion, solder, etc. the wave will be corrupted or missing altogether. This will cause your transmission to shift erratically or jump hard in and out of gear.

Intermittent problems are very common with a defective PSOM. It’s not uncommon for symptoms to appear one day and disappear the next.

If your vehicle speed sensor (VSS) signal is present and moving your speedometer needle but a signal is not passing though the PSOM, your issue is most likely the PSOM.

Don’t let harsh shifting ruin your E40D transmission!

This PSOM is a compatible with any of these part numbers: F3UF-14A608-DA | F5UF-14A608-AA | F6UF-14A608-AA | PWB-2256 | PWB-3855 | PWB3989

To remove the PSOM from the cluster, simply unscrew the lens with the black housing away from cluster. Pull the gauge pods away from the cluster (left and right of the speedometer. You do not need to remove needles; the gauges simply pull away from the cluster in sections and the speedometer will loosely pull away from the cluster.

To find your Tire CAL code, hold RESET button and turn the ignition on, let speedometer needle sweep to the right and back, then press RESET again and the code will appear.

Don’t hesitate to reach out if you have any other questions, we are always here to help!

-Module Mechanics

Additional information


1992, 1993, 1994, 1995, 1996, 1997




F150, F250, F350, F450, F550, Bronco, E150, E250, E350, E450, XL, XLT, Eddie Bauer, SVT Lightning, 4×4 Offroad

Engine Size

4.9L (300 cid) I6 – 5.0L (302 cid) V8 – 5.8L (351 cid) V8
7.5L (460 cid) – 7.3L (444 cid) Power Stroke or IDI Diesel

Part Numbers

F6TF-10C956-AA, F4TF-10C956-C, F2TF-10848-AA, F4TF-10849-DC, F4TF-10C956-B, F6TF-10849-GE, F2TF-10C956-B, F6TF-10849-AE, F2UF-10848-AA, F3TF-10C956-A, F6TF-10849-AA, F4TF-10849-BD, F4TF-10894-FC, F2TF-10C956-A, F6TF-10849-EF, F5UF-14A608-AA, PWB-3855, F3UF-14A608-DA, PWB-2256, F2UF-14A608-BD, PWB-1471, F2UF-14A608-BE, PWB-1769, F2TF-17282-A, F2TF-10E853-AE

Other Part Number(s)

F6TF10C956AA, F4TF10C956C, F2TF10848AA, F4TF10849DC, F4TF10C956B, F6TF10849GE, F2TF10C956B, F6TF10849AE, F2UF10848AA, F3TF10C956A, F6TF10849AA, F4TF10849BD, F4TF10894FC, F2TF10C956A, F6TF10849EF, F5UF14A608AA, PWB3855, F3UF14A608DA, PWB2256, F2UF14A608BD, PWB1471, F2UF14A608BE, PWB1769, F2TF17282A, F2TF10E853AE

  • 2 year warranty included with purchase, optional 5 year available.
  • Warranty will begin on the day tracking confirms delivery.
  • We do not reimburse for shipping and/or labor costs.
  • Return shipping labels are not currently provided.
  • Refunds after 90 days are only issued if exchange is unavailable.
  • 15% restocking fee may apply to non-defective returns.
  • Returns may be refused if tamper proof measures are altered.
  • Pre-owned units may show signs of wear.
  • Buyer is responsible for ordering correct part number as we do not verify with VIN.
  • Buyer assumes all responsibility confirming part function after installation & during road use.
  Having an issue? We’re here to help! Email us: support@modulemechanics.com


Our mission is providing unique and cost saving solutions to combat the automotive industries problematic electronic issues, keeping you in your car, not your wallet. 

F150 F20 F350 F450 F550 PSOM REPLACEMENT E150 E250 E350 E450 BRONCO
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Our Shipping Address

Module Mechanics

6732 W. Coal Mine Ave, STE 511, Littleton, CO 80123

*Please include your name or order number with the shipment

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