Mazda M5OD-R1 Manual Transmission

M5OD-R1 & M5OD-R1HDTransmission Specs & Ratios

The M5OD-R1 is a fully synchronized five speed manual transmission produced by Mazda. The transmission was first introduced for the 1988 model year in the Ford Ranger, Bronco II, and Aerostar. The transmission would be available in the Ford Ranger until its retirement following the 2011 model year. A HD version of the transmission, the M5OD-R1HD, is found behind applications equipped with Ford's 4.0L SOHC V-6. The HD configuration includes different gear ratios which are slightly taller than the standard M5OD.

M5OD-R1 Transmission Gear Ratios

 

1

2

3

4

5

R

R1

3.72 : 1

2.20 : 1

1.50 : 1

1.00 : 1

0.79 : 1

3.40 : 1

R1HD

3.40 : 1

2.05 : 1

1.31 : 1

1.00 : 1

0.79 : 1

3.40 : 1

 

Mazda M5OD-R1 Transmission Specs

Transmission:

Mazda M5OD-R1 (M5R1, Mazda R1, R1HD)

Type:

5 speed manual overdrive, toploading

Applications:

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

R1HD found in 2001 - 2003 Ford Explorer and 2001 - 2011 Ford Ranger w/ 4.0L V-6 engine

Case Material:

Aluminum case, top cover, and extension housing

Synchronized:

Synchronized in all forward gears & reverse

Output Spline:

25 spline output shaft

Max Input Torque:

331 lb-ft (450 N-m)

Overall Length:

29-1/2 in

Weight:

~ 90 lbs

Fluid Type/Spec:

MERCON V ATF (previously MERCON), 5.6 pints, 2.8 quarts capacity

Features:

• Hydraulic clutch system featuring a concentric internal slave cylinder (transmission must be removed to replace slave cylinder)

• Trans code "D", "R", or "J" (HD version) depending on model year

• Integrated bellhousing

• Toploading transmission

M

Mazda

5

5 forward speeds

OD

Overdrive

R1

Revision 1; light duty version of the M5OD transmission platform. A heavy duty version, the R2, can be found in many Ford F-150 applications.