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Home > M5R1 > Hard Parts
M5R1 Transmission
Rebuild Kits / Hard Parts
Drivetrain Parts Las Vegas offers quality M5R1 manual transmission rebuild kits and parts, our kits are designed to be top of the line overhaul kits. We have include information on how to identify individual transmissions, application information, model year, detailed kit and part availability by transmission type. Top loaded M5R1 transmission are covered in this section, rear wheel drive (RWD). Typically used in Ford Bronco II , Explorer, and Ranger Pickup requiring 5 speed applications. Mazda used the M5R1 in the following models: B2300, B2500, B3000, B4000 and the Navajo.
IDENTIFICATION - FORD TRUCK & SUV 5spd, RWD or 4WD, M5R1 Aluminum case and top cover, top loaded aluminum unit with an integral bellhousing and tower shift. Fully synchronized with brass synchro rings in all gears, including reverse. Front input shaft bearing is tapered with an 80mm O.D. The rear bearing retainer is aluminum. The shifter tower has the infamous three rubber plugs in the back that are prone to leak if not changed to steel. Inspect the units to see if they have the updated 5th/reverse assembly before ordering synchro kits or reverse gears.

M5R1 Part Number Description Type Years Cost
Syncro Ring Kits
SRK247A Syncro Ring Kit Synchro Kit (1 pc 2nd Synchro, 30 T 5th & Rev Synchro) 1988-90 $45.81
SRK247 Syncro Ring Kit Synchro Kit, (1 pc 2nd Synchro, 36 T 5th & Rev Synchro) 1990-97 $45.41
SRK
Miscellaneous Kits
121 306204K Input Shim Kit $20.93
306201 Front Bearing Kit Input bearing, snap ring, slinger, caged roller bearing gasket & seal 1987-On $41.90
306002 Gasket And Seal Kit 1987-On $13.99
M5R1-105K-S Shifter Repair Kit This kit includes 2 seats,Shift Stub Retainer,3 Screws,2 Washers,2 Guide Pins, Seal, Gasket $29.95
306201B Needle Bearing Kit M5R1 - All Apps $29.27
306701-2K 1-2 or 3-4 Key & Spring Kit This kit includes 2 springs and 3 keys, if you need both 1-2 and 3-4 order quantity 2 each. $7.39 ea
MWT-M5R1TC Top Cover/Shifter Remanufactured no core required, includes forks 88-94/95-On $250.00
Miscellaneous Parts
SHAFTS
5 306670 Input Shaft, 23t (mates with 306674) (Non-4.0L) Outside Diameter. (2.440” for M5R1-16) $42.41
5 306670A Input Shaft, 23t (mates with 306674A) (4.0L Only)Outside Diameter. (2.470” for M5R1-16A) $42.41
17 306672 Main shaft, 4WD 1988-2001 $99.21
17 306672A Main shaft, 2WD $111.83
32 306674 Cluster Gear 38-32-24-16 fOR 2.3, 2.5, 2.9 3.0L Engines Only 1988-97 $66.20
32 306674A Cluster Gear 38-34-25-17 For 4.0 L Engines Only 1990-97 $66.20
GEARS
19 306582 2nd Gear, 32 teeth $61.87
19 306582A 2nd Gear, 31 teeth $54.44
16 306583 3rd Gear, 29 teeth $42.90
16 306583A 3rd Gear 27 teeth $39.53
24 306585-2 Main shaft 5th Gear w/Spacer (#25) $37.53
36 306585-1 Countershaft 5th Gear, Updated $59.39
40 306587 Reverse Gear Non-updated Mainshaft 36T 87-On $58.98
306587A Reverse Gear Updated Counter Shaft 30t 01-On $55.45
306587K Reverse Kit, Gear/Slider/Ring (Non-Updated) $99.01
306587AK Reverse Kit, Gear/Slider/Ring (Updated) $86.54
BEARINGS
A306240 Input Shaft Bearing $31.78
7 306267 Pocket Bearing $6.37
10 306240A Thrust Thurst Bearing $6.95
306210 Mainshaft Bearing $14.87
306211 Rear Mainshaft Bearing $15.18
306260 Front Countershaft Bearing $35.57
306261 Middle Countershaft Bearing $45.41
476262 Rear Countershaft Bearing 6304-N $9.78
18 306271 1st Gear Needle Bearing $12.63
18 306271 2nd Gear Needle Bearing $12.63
15 306273 3rd Gear Needle Bearing $10.61
35 306275 5th Gear Needle Bearing $11.64
39 306277-1 Reverse Gear Needle Bearing $11.89
53 E8TZ7E139A Reverse Idler Needle Bearing MWT $24.98
SYNCHRO PARTS
476701 Synchro Rings 1 - 4 Same 1987-2000 Single pc $7.16
1L5Z7107DA Synchro Rings 3-4 Fiber Lined 2001-04 EA
306705 Synchro Rings 5th Gear 30T Updated $6.86
306705A Synchro Rings 5th Gear 36T Non Updated $6.86
306706 Synchro Rings Reverse Gear 36T Non Updated $6.86
306706A Synchro Rings Reverse Gear 30T Updated $7.16
F1TZ7107-AA Synchro Rings Reverse Gear 24T 2001-04 2001-04 $105.98
1L2Z7107AA Synchro Rings 1st Gear, USE ONLY With 2nd Gear Multi Piece Ring Assy 2001-04 $108.50
306702 Synchro Rings 2nd Gear Multi Piece Use ONLY 2001-04 $388.60
Synchro Rings 1st Thur 5th Are Fiber Lined 2004-On TBA
M5R1-2.5AC 3-4 Syncro Assembly (slider & hub only) $43.61
2.5 306703K 3-4 Syncro Assembly (Complete) Includes keys/springs, synchro rings ( 2 ) $76.23
2.5 306860 3-4 Syncro Assembly Snap Ring $4.92
8 M5R1-15C 5-R Slider, non-updated 36 Teeth $24.33
14 306643A 5-R Slider, Updated 30 Teeth $32.87
14 FORKS
306841 1-2 Shift Fork $24.10
56 306843 3-4 Shift Fork $30.25
56A FORK-USED 5/R 5th / Rev Fork non_updated 36t slider $42.50
FORK-USED 5/R 5th / Rev Fork updated 30t slider $42.50
TOP COVER
306833 Shifter Stub 1988-94, 4 5/8" $42.14
105 476756-4 Top Cover Pin 2 Req $2.36 ea
68 306484 Top Cover Plug (Front) 3 Req $3.54 all
81 476484 Top Cover Plugs, Steel (Rear) 3 Req $3.54 all
117 306411 Switch, Back up light 2 prong, Red with female connector no wires $11.37
ALTM5R1-70 Switch, Neutral safety 2 prong with wires $11.37
CASE PARTS
306066 Tail Housing Bushing $12.93
48 306724 Front Bearing Retainer $27.10
44 306697 Oil Trough $6.89
48 306485 Interlock Pin $29.16
75 306735 Rear Retainer Plate $21.10
23 476797 Countershaft Nut $7.92
43 306795 Main Shaft Nut $7.92
28 306997 Speedometer Gear, Green 8t $7.35
151 306997A Speedometer Gear, White 7t $9.16
151 SEALS
336070 Front Seal $6.25
476074 2wd Rear Seal $7.93
372070 4x4 Rear Seal $5.85
306084 Baffle Seal $6.61
M5R1-55 Top Cover Gasket - Oring $5.00