Mitsubishi / Ford Truck FM145/146/132 5 Speed (RWD) Manual Transmission Parts

These quality Mitsubishi Ford truck FM145 and FM146manual 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:

• MRK Kit (RWD): Main case bearings, gaskets, seals, kits may also include nuts, dogs & wires, thrust bearings, extension housing bushing, small parts kit, shifter bushings however miscellaneous parts will vary by transmission. Syncro rings are sold separately in sets.

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.

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.

REF #	PART NUMBER	DESCRIPTION	YEARS	COST
MASTER REBUILD KIT
	MRK100200	Master Rebuild Kit FM145 & FM146	1985-91	$229.85
REBUILD KIT
	K100200	Rebuild Kit FM145 & FM146	1985-91	$193.86
SYNCHRO RING KIT
	ASK340	Synchro Ring Kit	1985-87	$60.45
	ASK200	Synchro Ring Kit with Synchronized Reverse	1988-91	$88.90
MISCELLANEOUS KITS
	K100200-8	Gasket and Seal Kit FM145 & FM146	1985-91	$20.58
	ALTD50-55	D50 Gasket Set		$16.49
MISCELLANEOUS PARTS
Drawing Reference Number
16	ALTMIT-8	FM145 Cluster, 28-26-20-13		$81.84
16	ALTMIT-8A	FM146 Cluster, 28-24-19-13		$136.94
16	ALTD50-8	D50 Cluster Gear 28/26/20/13 1.837" 1st gr diam		$128.24
16	ALTD50-8A	D50 Cluster Gear 28/26/20/13id 1.815" 1st gr diam		$129.28
32	ALTMIT-11	FM145 3rd Gear, 24t		$85.98
29	ALTMIT-16D	FM146 Input, 20t		$92.64
29	ALTMIT-16F	FM145 input, 19t		$83.46
29	ALTD50-16	D50 Input Shaft, 19t uses 6307-N bearing		$102.83
29	ALTD50-16A	D50 Input shaft, 19t-1id uses F6307X1-1 bearing		$102.83
29	ALTD50-16B	D50 input shaft, 19t uses TMSC0788N bearing		$102.83
11	ALTMIT-5	FM145, FM146 5th Gear Set, Updated		$127.26
20	ALTMIT-5	FM145, FM146 5th Gear Set, Updated		$127.26
47A	ALTD50-30A	FM145, FM146, D50 1-2 Fork		$20.28
47	ALTD50-89A	FM145, FM146, D50 3-4 Fork		$16.54
47B	ALTD50-31A	FM145, FM146, D50 5th -Rev Fork		$18.26
80	ALTFM145-40	FM145, D50 5th Rev Synchro Assembly		$63.98
80	ALTMIT-40	FM146 5th Rev Synchro Assembly		$87.49
42	ALTD50-57	FM145, FM146 D50 Rear Retainer		$18.86
51	ALTD50-148	FM145, FM146 D50 Main Shaft Nut		$6.85
52	ALTD50-156	FM145, FM146 D50 Cluster Nut		$6.12
	ALTGK-MIT	FM Updated 5th Gear set w/Assembly		$195.88
	ALTGK-MITA	FM146 Updated 5th Gear Set w/Assembly		$216.78
	MTC-MW990006-R	5th Gear Bearing & Sleeve Update Kit See detailed discussion	1985-1992	$46.62
Check "Tag to Component Identification Chart" to verify proper gear/kit application.

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

In addition to the Mitsubishi Ford truck FM145 and FM146manual transmission parts, rebuild kits and overhaul kits listed here, we also provide an impressive list of automotive after market products for car, pickup truck, SUV and 4wd repair parts and accessories that includes rear end covers, ring and pinion gears, OE clutches and heavy duty performance clutches, diesel gauge kits, exhaust brakes, re manufactured manual and automatic transmissions and both manual and automatic overhaul kits. Other products we offer for the RV recreational vehicle market include REMCO drivelinedisconnects, tow bar and baseplates and auxiliary overdrive units to improve vehicle performance and save fuel. We have a complete 4 wheeling drivetrain product line including complete differential assemblies, limited slip and other solid locking positractions. We offer transmission conversion kits including the NV4500 and NV5600 as well as replacement kits for light duty GM and Jeep transmissions. You may be interested in visiting our Ford and Powerstroke Diesel page, Dodge Ram and other Jeep pages for detailed information.

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