Ford MT75 Gearbox guide to Specifications, Applications, Ratios & Common faults

Ford MT75 Gearbox guide to Specifications, Applications, Ratios & Common faults

The Ford MT75 gearbox is a durable 5-speed manual transmission developed for rear-wheel-drive (RWD) and four-wheel-drive (4x4) vehicles. Known for its strength, integrated bellhousing, and full synchromesh—including reverse gear—the MT75 transmission became a trusted choice in Ford’s lineup from the late 1980s to the early 2000s. This complete guide covers the MT75 gearbox’s specifications, gear ratios, vehicle applications, common issues, and maintenance tips.

What Is the Ford MT75 Gearbox?

The MT75 transmission is a 5-speed manual gearbox developed by Ford to replace the Type 9 gearbox. Launched in 1988, the MT75 takes its name from “Manual Transmission” and its 75mm gear centre spacing. It was Ford’s first gearbox with synchromesh on reverse gear, offering smooth operation even when engaging reverse from a rolling start.

Used in both performance and utility vehicles—including the Sierra RS Cosworth, Ford Transit, and Scorpio—the MT75 is valued for its reliability, torque handling, and adaptability across different engines and drivetrains.

Ford MT75 Gearbox Specifications

• Type: 5-speed manual gearbox
  
• Drive Layout: Rear-wheel drive (RWD) or full-time 4WD
  
• Casing: Cast aluminium with integrated bell housing
  
• Clutch Actuation: Cable-operated
  
• Lubrication: ATF
  
• Synchros: All 5 forward gears inc. reverse
  
• Torque Capacity: Officially rated at 220 Nm, handles up to 300 Nm+ with proper care
  
• Weight: Approx. 30–35 kg depending on variant
  
• 4WD Version: Includes viscous-coupled differential (34% front / 66% rear split)
  

This gearbox was engineered to deliver durability and ease of use, even in high-mileage or performance applications.

Ford MT75 Gear Ratios

Gear ratios in the MT75 vary slightly based on engine type and vehicle model. Below are the most common configurations:

Standard Petrol Gearbox

• 1st Gear: 3.89:1
  
• 2nd Gear: 2.08:1
  
• 3rd Gear: 1.34:1
  
• 4th Gear: 1.00:1
  
• 5th Gear: 0.82:1
  
• Reverse: 3.51:1
  

Cosworth / Performance Variant

• 1st Gear: 3.61:1
  
• 2nd Gear: 2.08:1
  
• 3rd Gear: 1.44:1
  
• 4th Gear: 1.00:1
  
• 5th Gear: 0.83:1
  
• Reverse: 3.26:1
  

Diesel / Late-Model Scorpio

• 1st Gear: 3.61:1
  
• 2nd Gear: 2.08:1
  
• 3rd Gear: 1.36:1
  
• 4th Gear: 1.00:1
  
• 5th Gear: 0.76:1
  

Note: Diesel versions typically have taller gearing for better fuel economy and lower cruising RPM.

Vehicle Applications: Which Cars Use the MT75 Gearbox?

The Ford MT75 gearbox was fitted to a wide range of vehicles between 1988 and the early 2000s. Key applications include:

Passenger Cars

• Ford Sierra (1989–1993): 2.0 DOHC and 4x4 variants
  
• Sierra Sapphire RS Cosworth 4x4
  
• Ford Escort RS Cosworth (1992–1996)
  
• Ford Granada / Scorpio (1989–1998): 2.0, 2.3, 2.9 V6, and 2.5 TDi
  
• Morgan Roadster (2004–2018): Used with Ford 3.0 and 3.7 V6 engines
  

Vans & Commercial Vehicles

• Ford Transit (1988–2000): Petrol and diesel RWD models
  
• LDV Convoy (1996–2005): With Ford diesel engines
  

Kit Cars & Conversions

• Popular in Westfield & Locost kit cars
  
• Common in Rover V8 swaps, classic Ford restorations, and custom builds
  

The MT75's availability, strength, and variety of bellhousing patterns make it ideal for custom applications and upgrades.

Common Problems with the MT75 Gearbox

Although well-regarded for reliability, the MT75 gearbox has some known issues, especially with age or high torque use:

• Bearing Failure: Input and output shaft bearings can wear, leading to whining or vibration.
  
• Selector Fork Wear: Brass forks may bend or crack, causing gear selection issues.
  
• Synchro Ring Wear: 1st and 2nd gears may become notchy or crunch.
  
• Mainshaft & Laygear Wear: Excessive play or gear rattle
  
• Loose Input Shaft Retainer: The nose cone may loosen and cause fluid leaks
  
• Oil Leaks: Especially from rear seal or selector shaft
  

For modified cars or turbocharged engines, 3rd gear failure is common above 300 lb/ft of torque.

Maintenance Tips for the Ford MT75 Transmission

Proper maintenance helps maximise the life of your MT75 gearbox. Here’s what to watch for:

• Fluid Type: Use ATF only
  
• Fluid Level: Check regularly—gearboxes may leak slowly over time
  
• Fluid Change Interval: Change approx every 50,000–70,000 miles (or during rebuild)
  
• Inspect for Leaks: Especially around the nose cone and rear output seal
  
• Check Mounts: A failing transmission mount can cause poor gearshift feel
  
• Use a Healthy Clutch: Clutch drag can wear the reverse synchro prematurely
  

While many MT75s were “filled for life,” regular fluid changes and leak checks are recommended for longevity.

Why Choose the MT75 Gearbox?

The Ford MT75 transmission offers a blend of strength, refinement, and compatibility. It's:

• Strong enough to handle 300 Nm+ with ease
  
• Available in 2WD and 4WD configurations
  
• Compatible with a range of Ford engines (Pinto, DOHC, Cosworth, V6, Diesel)
  
• Ideal for upgrades in classic cars, kit cars, and custom builds
  
• Backed by OEM and aftermarket support for spares and rebuild kits
  

With the right setup and care, the MT75 remains a top choice for RWD Ford enthusiasts and race car builders today.