Mazda M5OD transmission

The M5OD (Mazda 5-speed with Over Drive)^[1] is a line of manual transmissions produced by Mazda and used in Mazda and Ford cars and trucks. Two variants, light-duty R1 and medium duty R2, are made. R1 transmissions have been used in the Ford Ranger, Explorer, Aerostar, and Bronco II. R2 versions have been used in the F-150, Econoline Van, full size Bronco, and the Cougar/Thunderbird with the supercharged V6. The M5OD ended production in December 2011, being last used in the 2011 Ford Ranger.

The M5OD is fully synchronized on all gears, including reverse. The synchronized reverse gear was one of the main features of the new units, to protect internal components from being damaged by inadvertent operation by the customer, and was protected by US Patent 4,757,726.^[2] The transmission has an integral bellhousing, making the power plant stiffness high enough to avoid harmful resonance. The transmission uses a hydraulic clutch setup and has an internal slave cylinder, which is a source of frustration for anyone having a slave cylinder failure, as it requires the entire transmission to be removed.

Applications

M5OD-R1

1988–2011 Ford Ranger
1988–1990 Ford Bronco II
1988–1995 Ford Aerostar
1991–2000 Ford Explorer

M5OD-R1HD

2001–2003 Ford Explorer Sport (4.0 L SOHC V6 engine)
2001–2011 Ford Ranger (4.0 L SOHC V6 engine)

M5OD-R2

1988–1996 Ford F-150 (4.9 L {300 ci} I6 and 5.0 L {302 ci} V8 engines)
1987–1996 Ford Bronco (4.9 L {300 ci} I6 and 5.0 L {302 ci} V8 engines)
1997–2008 Ford F-150 4.2 L V6 and 4.6 L V8 engines
2006–2011 Ford Ranger/Mazda BT-50 (2.5/3.0 L I4 common rail turbocharged diesel engines)
2007–2010 Ford Everest (2.5/3.0 L I4 common rail turbocharged diesel engines)

M5R2-RKE

1989–1995 Ford Thunderbird Super Coupe (3.8 L V6 supercharged engine)
1989–1990 Mercury Cougar XR-7 (3.8 L V6 supercharged engine)

Gallery

Front view
Top view
Input shaft
Output shaft

Notes

↑ "Mazda M5OD-R2 (M5R2) Transmission Specs & Ratios". www.f150hub.com. Retrieved 2018-01-09.
↑ Yamaguchi; Touhei; Moriyama; Kazuhiko; Shirai; Ethuo (19 July 1988). "United States Patent: 4757726". Mazda Motor Corporation. United States Patent and Trademark Office. Retrieved 13 July 2010.

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[1] "Mazda M5OD-R2 (M5R2) Transmission Specs & Ratios". www.f150hub.com. Retrieved 2018-01-09.

[US_Patent-2] Yamaguchi; Touhei; Moriyama; Kazuhiko; Shirai; Ethuo (19 July 1988). "United States Patent: 4757726". Mazda Motor Corporation. United States Patent and Trademark Office. Retrieved 13 July 2010.