These quality Mitsubishi Ford truck FM132, FM145 and FM146 manual transmission 
parts, rebuild kits and overhaul 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 availablity by transmission type.
Different overhaul kits are available depending on the extent of the overhaul that you plan, the contents of the kits are described as follows:
DTSBKXXX Kits (RWD): Main case bearings, gaskets, seals. You may also want to add new bearing retainer, nuts, dogs & wires, extension housing bushing, small parts kit, shifter bushings. Syncro rings are not included in these kits.
DTSBKXXXWS Kits (RWD): Main case bearings, gaskets, seals. You may also want to add bearing retainer, nuts, dogs & wires, extension housing bushing, small parts kit, shifter bushings. Syncro rings are included in these kits.
Information and parts are provide for the following Mitsubishi Transmissions: Mitsubishi / Ford Truck FM145/146/132 5 Speed (RWD) an illustrated parts drawing for the FM145 FM166 and K132 is provided.
IDENTIFICATION --- Mitsubishi built aluminum bottom loaded case with 12-bolt steel cover in bottom. The bellhousing is separate from the case and the front bearing retainer is aluminum with no snout. Found in Ranger and Bronco II, both 2WD & 4WD models.
Notorius Problem and Recommended Fix
IDENTIFICATION --- Mitsubishi built aluminum bottom loaded case with 12-bolt steel cover in bottom. The bellhousing is separate from the case and the front bearing retainer is aluminum with no snout. Found in Ranger and Bronco II, both 2WD & 4WD models.
Check "Tag to Component Identification Chart" to verify proper gear/kit application
It's easy to get the correct parts the first time from drivetrain.com. Using the application tables below just locate your vehicle model, model year, number of cylinders and engine size read across to identify correct overhaul kit part number. Make a note of the part number and complete our secure easy order from .
| Model |
Cyl. |
Eng. |
Trans. Model |
Year |
Description |
Overhaul Kit |
Overhaul Kit with Syncro Rings |
| BRONCO II |
4 cyl |
2.3L |
FM132 |
1988 |
12 bolt tin bottom pan |
DTSBK151B |
DTSBK151BWS |
| BRONCO II |
4 cyl |
2.0L |
FM132 |
1988 |
12 bolt tin bottom pan |
DTSBK151B |
DTSBK151BWS |
| BRONCO II |
6cyl |
2.9L |
FM132 |
1988-90 |
12 bolt tin bottom pan |
DTSBK151B |
DTSBK151BWS |
| RANGER |
4cyl |
2.0L |
FM132 |
1988 |
12 bolt steel bottom pan |
DTSBK151B |
DTSBK151BWS |
| RANGER |
4cyl |
2.3L |
FM132 |
1988-92 |
12 bolt steel bottom pan |
DTSBK151B |
DTSBK151BWS |
| RANGER |
6cyl |
2.9L |
FM132 |
1988-90 |
12 bolt steel bottom pan - 2 wheel drive only - reverse synchro ring |
DTSBK151B |
DTSBK151BWS |
| BRONCO II |
4 cyl |
2.0L |
FM145 |
1985-87 |
4WD, 12 bolt tin bottom pan |
DTSBK151 |
DTSBK151WS |
| BRONCO II |
4 cyl |
2.3L |
FM145 |
1985-87 |
4WD, 12 bolt tin bottom pan |
DTSBK151 |
DTSBK151WS |
| BRONCO II |
6cyl |
2.8L |
FM145 |
1985 |
4WD, 12 bolt tin bottom pan |
DTSBK151 |
DTSBK151WS |
| BRONCO II |
6cyl |
2.9L |
FM145 |
1986-87 |
4WD, 12 bolt tin bottom pan |
DTSBK151 |
DTSBK151WS |
| RANGER |
4cyl |
2.0L |
FM145 |
1985-87 |
4WD, 12 bolt steel bottom pan |
DTSBK151 |
DTSBK151WS |
| RANGER |
4cyl |
2.3L |
FM145 |
1985-87 |
4WD, 12 bolt steel bottom pan |
DTSBK151 |
DTSBK151WS |
| RANGER |
6cyl |
2.8L |
FM145 |
1985-87 |
4WD, 12 bolt steel bottom pan |
DTSBK151 |
DTSBK151WS |
| RANGER |
6cyl |
2.9L |
FM145 |
1985-87 |
4WD, 12 bolt steel bottom pan |
DTSBK151 |
DTSBK151WS |
| BRONCO II |
4 cyl |
2.3L |
FM146 |
1988 |
4WD, 12 bolt tin bottom pan - reverse synchro ring |
DTSBK151 |
DTSBK151AWS |
| BRONCO II |
4 cyl |
2.0L |
FM146 |
1988 |
4WD, 12 bolt tin bottom pan - reverse synchro ring |
DTSBK151 |
DTSBK151AWS |
| BRONCO II |
6cyl |
2.9L |
FM146 |
1988-90 |
4WD, 12 bolt tin bottom pan - reverse synchro ring |
DTSBK151 |
DTSBK151AWS |
| RANGER |
4cyl |
2.0L |
FM146 |
1988 |
4WD, 12 bolt steel bottom pan - reverse synch ring |
DTSBK151 |
DTSBK151AWS |
| RANGER |
4cyl |
2.3L |
FM146 |
1988-92 |
4WD, 12 bolt steel bottom pan - reverse synch ring |
DTSBK151 |
DTSBK151AWS |
| RANGER |
6cyl |
2.9L |
FM146 |
1988-90 |
4WD, 12 bolt steel bottom pan - reverse synch ring |
DTSBK151 |
DTSBK151AWS |
| REF # |
PART NUMBER |
DESCRIPTION |
YEARS |
| SYNCHRO RING KIT |
|
|
| |
ASK340 |
Synchro Ring Kit |
1985-87 |
| |
ASK200 |
Synchro Ring Kit with Synchronized Reverse |
1988-91 |
| MISCELLANEOUS KITS |
|
|
| |
406002 |
Gasket and Seal Kit FM145 & FM146 |
1985-91 |
| |
ALTD50-55 |
D50 Gasket Set |
|
| MISCELLANEOUS PARTS |
|
|
| Drawing Reference Number |
|
|
| 16 |
TRS406674 |
FM145 Cluster, 28-26-20-13 |
|
| 16 |
TRS406674A |
FM146 Cluster, 28-24-19-13 |
|
| 16 |
TRS362674 |
D50 Cluster Gear 28/26/20/13 1.837" 1st gr diam |
|
| 16 |
TRS362674A |
D50 Cluster Gear 28/26/20/13id 1.815" 1st gr diam |
|
| 32 |
ALTMIT-11 |
FM145 3rd Gear, 24t |
|
| 29 |
TRS406670 |
FM146 Input, 20t |
|
| 29 |
TRS406670A |
FM145 input, 19t |
|
| 29 |
TRS362670 |
D50 Input Shaft, 19t uses 6307-N bearing non stepped 21mm thick |
|
| 29 |
TRS262670A |
D50 Input shaft, 19t-1id uses F6307X1-1 sinput bearing |
|
| 29 |
TRS362670B |
D50 input shaft, 19t uses TMSC0788N non stepped bearing 24mm thick |
|
| 11 |
TRS406585K-1 |
FM145, FM146 5th Gear Set, Updated |
|
| 20 |
ALTMIT-5 |
FM145, FM146 5th Gear Set, Updated |
|
| 47A |
TRS406841 |
FM145, FM146, D50 1-2 Fork |
|
| 47 |
TRS406843 |
FM145, FM146, D50 3-4 Fork |
|
| 47B |
ALTD50-31A |
FM145, FM146, D50 5th -Rev Fork |
|
| 80 |
TRS406709K |
FM145, D50 5th Rev Synchro Assembly |
|
| 80 |
ALTMIT-40 |
FM146 5th Rev Synchro Assembly |
|
| 42 |
TRS406736 |
FM145, FM146 D50 Rear Retainer |
|
| 51 |
TRS406795 |
FM145, FM146 D50 Main Shaft Nut |
|
| 52 |
TRS406796 |
FM145, FM146 D50 Cluster Nut |
|
| |
TRS406585AK |
FM Updated 5th Gear set w/Assembly |
|
| |
ALTGK-MITA |
FM146 Updated 5th Gear Set w/Assembly |
|
| |
MTC-MW990006-R |
5th Gear Bearing & Sleeve Update Kit See detailed discussion |
1985-1992 |
The Mitsubishi 5 speed used in the Ford Ranger from 1985 to 1992 has had a notorius problem with the 5th gear bearing sleeve wearing into the 5th/reverse synchronizer hub. This problem further has cause the failure of the 5th gear on the mainshaft, causing the 5th gear to seize to the 5th/reverse hub and then break.
The problem is inherent, because the mating-surface area of the 5th gear bearing sleeve is too small. Although pressures against the hub are amplified while the transmission is a high operating temperatures, they decrease significantly when the transmission cools to ambient temperature. This continual pattern causes the sleeve to work loose against the 5th/reverse synchronizer hub and then begins to wear into the splined area of the hub.
As this wears, the preset factory clearances for end play are diminished to the point that the 5th gear on the mainshaft begines to heat the hub and scuffing begins to appear. If this situation is not corrected, it will cause the 5th gear to seize to the hub, breaking the gear teeth.
Given the size and load characteristics of the 5th gear, correcting the problem by simply changing the gear design is next to impossible. Now available is a unique answer to this nagging problem. Not only is it simple but also it is very inexpensive to install. The entire kit includes only tow pieces, a newly designed caged bearing and bearing sleeve (see Figure 1). Further design change directs the radial pressure from the gear to a more specified area on the bearing sleeve. |
|
|
|
|
|
Installation
During inspection for a repair or re-build of the Mitsubishi-built 5 speed, closely examine the area where the 5th gear bearing sleeve contacts the 5th/reverse synchronizer hub. If there is any noticeable wear, replace the 5th/reverse synchronizer hub. Also compare old design 5th needle bearing sleeve to new design (see Figure 1), and after inspection install new design 5th bearing sleeve with flange against 5th/reverse synchronizer hub (see Figure 2). Figue 1 also shows the old design.
Apply assembly lube on all mating thrust surfaces and assemble remainder of main shaft. Torque mainshaft nut to 181-195 ft. lbs. Check that the .006" - .010" clearance is maintained between the 5th gear on the mainshaft and the 5th gear thrust washer (see Figure1).
This installation will end you problems of poor th gear end clearance on the Mitsubish-built rear wheel drive 5 speed. The update kit is approved by the OEM manufacture.
By Ray Schoenfelder |
