Ford P100 Gearbox Replacement Parts

The Ford P100 was produced from 1983 to 1992 as a single generation pickup truck based on the Ford Sierra platform, so gearboxes sourced from within that 1983–1992 window are your starting point. However, fitment depends primarily on the engine code rather than the year alone, so always match the engine code on your V5 or a VIN check before buying. Supply that code to the breaker and they can confirm the correct unit.

The P100 ran as a single generation from 1983 to 1992, but there were running production changes across those years that could affect ancillary fittings and mountings. The engine code is the most reliable guide to whether a donor gearbox is the right match, so check yours from the V5 before approaching a breaker. Confirm any year-to-year crossing directly with the breaker against your registration, as they can identify whether a specific unit is compatible.

Yes, engine code matters above everything else for gearbox fitment — a diesel P100 and a petrol P100 will not use the same gearbox, and different petrol variants can also differ. Find your engine code on your V5 or through a VIN check and give it to the breaker as the first piece of information. This single detail is more useful than the year or any other specification when sourcing a used gearbox.

No, trim level does not affect gearbox fitment on the P100 — the gearbox follows the engine and drivetrain specification, not the trim. Whether your truck is a base or higher-specification variant, what matters is the engine code and whether you have a manual or automatic transmission. Focus on matching those mechanical details rather than trim when speaking to a breaker.

The P100 was based on the Sierra platform and shares significant mechanical architecture with it, making Sierra-sourced gearboxes a possibility that many breakers are familiar with. However, whether a specific Sierra gearbox crosses over correctly depends on the engine codes of both vehicles, the gearbox type, and whether mounting and ancillary points align. Raise this directly with the breaker with both engine codes to hand, and confirm compatibility against your registration rather than assuming it will fit.

Engine code and fuel type are the critical fitment factors, so a matching engine code from any year within the 1983–1992 P100 range is the right starting point. Mileage affects the condition and expected remaining life of the unit rather than whether it will physically fit your vehicle. Ask the breaker about the mileage and condition of the donor unit, and confirm fitment against your registration before purchasing.