Mack's Standard Transmission Inc.
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Bearing Rebuild Kits:
Transmissions
Transfer Cases
Front & Rear Axles


Parts:
Bearings
Seals
Synchronizers
Main Shafts
Input Shafts
Counter Shafts
Gears
Bearing Retainers
Shift Forks
Shift Rails
Axle Shafts
Clutch Kits
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Mazda Ford M5R1 4x4

Bearing (Rebuild) Kit:
  Application Year Notes Kit # w/Synchros
Ford        
  Ranger, Bronco II, Explorer, Aerostar Van 5sp E87A, E97A, F07A, F17A
87-on
Alum Case, Alum Top Cover. Also called M50D or Toyokoygo. 5th and Rev Synchros may change. BK247
      36 Synchro Teeth use BK247WS.   BK247WS
      30 Synchro Teeth use BK247AWS (Updated).   BK247AWS
  Ranger, Explorer
01-on
1-2 Synchro rings Larger Dia. "45T", 2nd Synchro 3 Piece type.
BK247 BK247BWS

Countershaft (Cluster):
REF # Part # Description
8 M5R1-8 M5R1 Cluster Gear 38-32-24-16
8 M5R1-8A M5R1 Cluster Gear 38-34-25-17


Input Shaft:
REF # Part # Description
16 M5R1-16 M5R1 Input Shaft, 23t (mates with M5R1-8)
16 M5R1-16A M5R1 Input Shaft, 23t (mates with M5R1-8A)


Main Shaft:
REF # Part # Description
2 M5R1-2 M5R1 Mainshaft 4x4
2 M5R1-2A M5R1 Mainshaft 2wd


Hubs & Sleeves (sliders):
REF # Part # Description
43 M5R1-2.5 M5R1 3-4 Synchro Assembly (slider & hub only)
43 M5R1-2.5A M5R1 3-4 Synchro Assembly (complete)
45 M5R1-15 M5R1 5-R Slider, non-updated 36 Splines
45 M5R1-15A M5R1 5-R Slider, Updated

Synchros:
REF # Part # Description
  M5R1-14 M5R1 Rev Sycnhro Ring, Non-updated, 36t
14b M5R1-14B M5R1 5th Synchro Ring, Updated, 30t
  M5R1-14C M5R1 Rev Synchro Ring, updated, 30t
  M5R2-14E M5R1 1-4 Synchro Ring
14b MAZ-14A M5R1 5th Synchro Ring, Non-updated


Shift Forks:
REF # Part # Description
  M5R1-23 M5R1 1-2 Shift Fork
  M5R1-23A M5R1 3-4 Shift Fork


Bearings:
REF # Part # Description
1 30207/80 M5R1 Input Shaft Bearing
4 K25/33/24 M5R1 Pocket Bearing
3 AXJ39X62.3x4 M5R1 Thrust Bearing
53 E8TZ7127A M5R1 3rd Gear Needle Bearing
52 E8TZ7133A M5R1 2nd Gear Needle Bearing
51 E8TZ7133A M5R1 1st Gear Needle Bearing
  30207 M5R1 Mainshaft Bearing
5 6207/33 M5R1 Rear Mianshaft Bearing
7 NJ2205 M5R1 Front Countershaft Bearing
  NJ206EX1 M5R1 Middle Countershaft Bearing
55 E8TZ7R130A M5R1 5th Gear Needle Bearing
58 K24/28/16.5 M5R1 Reverse Gear Needle
23 6304-N M5R1 Rear Countershaft Bearing


Bearing Retainers:
REF # Part # Description
6 M5R1-6 M5R1 Front Bearing Retainer

Key / Spring / Ball Kit:
REF # Part # Description
M5R1-K3 M5R1 3-4, 1-2 Key & Spring Kit


Gears 1-R:
REF # Part # Description
11 M5R1-11 M5R1 3rd Gear 29t
11 M5R1-11A M5R1 3rd Gear 27t
18 M5R1-18A M5R1 Mainshaft 5th Gear w/ Spacer (#146)
19 M5R1-19A M5R1 Countershaft 5th Gear Updated
21 M5R1-21 M5R1 2nd Gear 32t
21 M5R1-21A M5R1 2nd Gear 31t
36 M5R1-36 M5R1 Rev Gear non-updated
36 M5R1-36A M5R1 Countershaft Rev Gear Updated

Miscelaneous Parts :
REF # Part # Description
  M5R1-40 M5R1 5-R Assembly Updated
  13948CR M5R1 Front Seal
  M5R1-62 M5R1 2wd Tailhousing Bushing
  2245 M5R1 2wd Rear Seal
  11615 M5R1 4x4 Rear Seal
  M5R1-63 M5R1 Oil Trough
  M5R1-55 M5R1 Top Cover Gasket
  M50-P1 M5R1 Top Cover Pin
  219-1135 M5R1 Top Cover Plug (Front)
  M5R1-105 M5R1 Shifter Stub
  M5R-28A M5R1 Shifter Seat
  M5R1-109 M5R1 Shifter Stub Spacer
  E8TZ277A M5R1 Shift Stick Rubber Retainer
  M5R1-111 M5R1 Shift Boot Bolts
  555-108 M5R1 Top Cover Plugs, Steel (Rear)
  M5R1-SMK M5R1 Input Shim Kit
  3541 M5R1 Baffle Seal
  M5R1-46A M5R1 Input Slinger
  M5R1-144 M5R1 Rear Retainer Plate
77 M5R1-149 M5R1 Mainshaft Nut
  RUS206E M5R1 Middle Countershaft Bearing Race
78 M5R1-167 M5R1 Countershaft Nut
RK-M5R1 M5R1 Rev Kit, gear/slider/ring (Non-Updated)
RKL-M5R1 M5R1 Rev Kit, gear/slider/ring (Updated)
FK-M5R1 M5R1 Front Repair Kit