The input gear drives the 5th, 1st, and 2nd gears and the reverse idler gear. Mounted on the countershaft are the 5th and reverse synchronizer and speed gears and the 1-2 speed gears and synchronizer assembly. Fourth gear is part of the shortened output shaft or mainshaft.
![m5r1 repair manual m5r1 repair manual](https://zbook.org/img/19/1268197.jpg)
At the rear of the input shaft is the 3-4 synchronizer assembly. The design of the new M5R4 locates the 5th gear as the the first gear on the input shaft, followed by reverse, 1st, 2nd, and 3rd gears, in that order. The 1-2 speed gears and synchronizer assembly and the the 5th and reverse speed gears and synchronizer are mounted on the countershaft. On the M5R1 unit the 3-4 synchronizer assembly is on the mainshaft directly behind the input gear. The input was relatively short, with the drive gear mounted behind the input bearing and a pocket in the input to support the pilot journal of the mainshaft on a needle or tapered bearing.
#M5r1 repair manual manuals
Traditionally, rear wheel drive manuals have been designed with 4th gear being the input shaft.
#M5r1 repair manual manual
The M5R4 represents one of the most radical design changes in rear wheel drive manual transmissions. Mercon ATF is the lubricant fill specified for the M5R4. Gone is the removeable shift cover, and all shift components are housed in the main case. The speed gears all run on needle bearings on the shafts. All speeds are fully synchronized with helical cut gears. The mainshaft and countershaft are supported by tapered bearings with shims under the races to set endplay. The new model has a detachable bellhousing, a main case and extension housing, all made of aluminum. The M5R1 transmission we all know and love has been replaced by a radical new design built by Mazda. The manual transmission option for the new four door model is a 5-speed fully synchronized unit designated the M5R4 or M5OD-R4. In 2002 Ford introduced a new four-door model of the venerable Explorer and its sister, the Mercury Mountaineer. Therefore, we present you with this information.
![m5r1 repair manual m5r1 repair manual](https://cdn3.volusion.com/ymcqg.kvqok/v/vspfiles/photos/SRK247-1.jpg)
So it may be that someone will decide to swap one in to a Ford Ranger. The 2002+ Ford Explorer (not Sport) came with the new M5OD-R4 (M5R4) behind the SOHC 4.0. The SOHC 4.0 in the Ford Ranger came with a M5OD-R1-HD manual transmission.