Ford MT75 transmission

The MT75 is a

rear wheel drive Rear-wheel drive (RWD) is a form of engine and transmission layout used in motor vehicles, in which the engine drives the rear wheels only. Until the late 20th century, rear-wheel drive was the most common configuration for cars. Most rear-wheel ...

or four wheel drive

gearbox Propulsion transmission is the mode of transmitting and controlling propulsion power of a machine. The term ''transmission'' properly refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive vehicles), differe ...

, depending on variant, made by the

Ford Motor Company Ford Motor Company (commonly known as Ford) is an American multinational automobile manufacturer headquartered in Dearborn, Michigan, United States. It was founded by Henry Ford and incorporated on June 16, 1903. The company sells automobi ...

. The MT75 replaced the

Ford Type 9 transmission Type 9 (also, Type N, T9, or T-9) is a gearbox from Ford that was used in Ford Capri 1.6, 2.0 1984 onwards, Capri 2.8 1983 onwards, Ford Sierra 1.6, 1.8, 2.0, Sierra XR4i, Sierra XR4x4 2.8 and the Scorpio 4x4 as well as the US market Merkur XR4Ti ...

. The MT75 has an all alloy casing and comes with an integrated bellhousing. In 4x4 versions, the

planetary gear An epicyclic gear train (also known as a planetary gearset) consists of two gears mounted so that the center of one gear revolves around the center of the other. A carrier connects the centers of the two gears and rotates the planet and sun gea ...

center differential with viscous-type limited slip is integrated in to the rear half of the gearbox. The 4x4 system is of full-time type with a static torque split of 34% front, 66% rear (similarly to Type 9 4x4 models). The MT75 has five speeds and reverse. This was the first Ford production gearbox to have a

synchromesh A manual transmission (MT), also known as manual gearbox, standard transmission (in Canada, the United Kingdom, and the United States), or stick shift (in the United States), is a multi-speed motor vehicle transmission system, where gear changes ...

on reverse (so reverse can be selected whilst in slight forward motion). The internal gear assembly in order from front to back as installed on the mainshaft is as follows: 4th, 3rd, 2nd, 1st, Reverse with 5th gear situated at the rear towards the output (propshaft flange), all gears are of a helical cut with the exception of reverse which is straight cut. Refined over time with slight improvement made to the synchro's phasing out single part synchromesh's on 1st & 2nd gear in favour of three part syncro's. The designation breaks down as
"M" Manual
"T" Transmission
"75" the distance in millimetres between the main and layshaft centers.
Common failures include: • Mainshafts wear through the hardening (1st - 3rd roller) on the journals resulting in noise
• Front and or rear bearing failure
• Brass Selector forks wear out (jumps out of gear) although this can also be caused by worn dogs & windows on hubs (less common)
• Nose cone / Guide tube becomes loose, loss of oil & burnt out gearbox
• Laygear bearings wear out
• Spigot wear / first motion 4th gear separation / loss of drive
Used in the Sierra and

Granada Granada (,, DIN 31635, DIN: ; grc, Ἐλιβύργη, Elibýrgē; la, Illiberis or . ) is the capital city of the province of Granada, in the autonomous communities of Spain, autonomous community of Andalusia, Spain. Granada is located at the fo ...

, it came in various flavours for each engine and was used in two wheel drive and

four wheel drive Four-wheel drive, also called 4×4 ("four by four") or 4WD, refers to a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously. It may be full-time or on-demand, and is typically linked via a transfer case ...

(MT75 4x4) versions (four wheel drive in the 4x4 Sapphire Cosworth, Escort Cosworth and

XR4x4 The Ford Sierra is a mid-size car or large family car manufactured and marketed by Ford Europe from 1982-1993, designed by Uwe Bahnsen, Robert Lutz and Patrick le Quément — and noted for its aerodynamic styling producing a drag coeffi ...

). This transmission, like the

Type 9 Type 9 (also, Type N, T9, or T-9) is a gearbox from Ford that was used in Ford Capri 1.6, 2.0 1984 onwards, Capri 2.8 1983 onwards, Ford Sierra 1.6, 1.8, 2.0, Sierra XR4i, Sierra XR4x4 2.8 and the Scorpio 4x4 as well as the US market Merkur XR4Ti a ...

, is already used in uprated classic cars and

hot rod Hot rods are typically American cars that might be old, classic, or modern and that have been rebuilt or modified with large engines optimised for speed and acceleration. One definition is: "a car that's been stripped down, souped up and made ...

s, especially if a

Ford Pinto engine The Ford Pinto engine was the unofficial name for a four-cylinder internal combustion engine built by Ford Europe. In Ford sales literature, it was referred to as the EAO or OHC engine and because it was designed to the metric system, it was som ...

, a multi valve 4-cylinder or

Rover V8 engine The Rover V8 engine is a compact V8 internal combustion engine with aluminium cylinder block and cylinder heads, originally designed by General Motors and later re-designed and produced by Rover in the United Kingdom. It has been used in a wide ...

is used. It should not be confused with the

MTX-75 The Ford MTX-75 (M TransaXle), is a 5-speed transmission developed by Ford Motor Company for its larger-engined front wheel drive models. "75" refers to the distance in millimeters between the main and lay shafts. Debuting in 1992, the transmissi ...

which is a completely different gearbox for front wheel drive models such as the

Mondeo The Ford Mondeo is a large family car manufactured by Ford since 1993. The first Ford model declared as a "world car", the Mondeo was intended to consolidate several Ford model lines worldwide (the European Sierra, the Telstar in Asia and Austr ...

Ford Escort (Europe) The Ford Escort is a small family car that was manufactured by Ford of Europe from 1968 until 2000. In total there were six generations, spread across three basic platforms beginning with the original rear-wheel drive Mk.1/Mk.2 (1968–1980), ...

also latterly adapted for use in Jaguars & Transit connect vans. MT75 {{Automotive-part-stub