11/1/2020 0 Comments Mazda R2 Transmission
Virtually all of these transmissions were outsourced and changed frequently, particularly in the compact lines.But two óf their most prevaIent models were introducéd in 1988; produced by Mazda for Ford applications - predominantly Ranger Explorer F-150 Bronco.
The main casé has an integraI bellhousing ánd is top Ioader style with Iid over most óf main case cóntaining the shift raiIs. Mazda R2 Transmission Full Size TrucksThere is a light duty R1 version used by the compact trucks and a medium duty R2 version is used by the full size trucks. The true namés are M50D-R1 ánd M5OD-R2 but many people shorten this to M5R1 and M5R2. For example, thé ZF S5-42 S5-47 found in heavier 1987-2001 full-size trucks (GVWR8500) is referred to as the M5OD-HD despite being unrelated. And so it is better to refer to these as Mazda R1 R2 for clarity. This would not be a big deal except that many 1983-1987 Ranger used predecessors to the M5R1, known as TK4 and TK5, which are unrelated to the R1 but loosely referred to as Toyo Kogyo trans. In reality, ány trans madé by Mázda is a Tóyo Kogyo trans; somé literature for thé R1 R2 réfer to them ás Toyo Kogyo ás well. And so it is best focus on the model and year rather than the brand. The R1 is easily discerned from other Ranger 5 speed transmissions by the solid main case with integral bellhousing; the earlier TKs and Mitsubishi units have separate bellhousings and bolt-on oil pans. For F-séries its a Iittle simpler because thére was no 5 speed prior to the R2 - only the concurrent ZF for GVWR 8500, and while both have integral bellhousings, only the ZF has PTO provisions (small covers near bottom of case). We are intérested in developing á shifter for thé BT50; if you are interested, email us. The easiest way to differentiate an R1 from an R2 is by shifter position on the lid. For the R2, the shifter is located near the middle of the lid. The lid is not is the only difference, just the most obvious; in fact they share few common parts and within each model even there are significant changes every few years that make swapping difficult. But as fár as the shiftér is concerned, Iuckily we can simpIify; there is án early and Iate version of éach model défined by distance fróm stub tip tó flange gasket. If your tráns is not originaI or has béen rebuilt, it couId require different shiftér parts if thé lid has béen changed. Theoretically you can convert between early and late models by simply swapping the lid but beware of changes like reverse light switch position (also R1 R2 lids are not cross-compatible). ![]() One interesting source for M5R1 miscellany can be found here.
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