Muncie M21 and M22 Overhaul Kit

Muncie M21 / M22 4 Speed (RWD) Manual Transmission Parts

These quality M21 and M22's manual transmission parts, rebuild 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 availability by transmission type. Muncie transmissions are covered in this section M21 and M22's, rear wheel drive (RWD), requiring 4 speed applications. The Muncie 4 speed manual transmission was use by General Motors in Buick Special, Special Deluxe, GS, Lesabre, Wildcat, Electra, Century, Centurion, Skylark and Regal. Chevrolet Belair, Biscane, Camaro, Chevelle, El Camino, Impala, Malibu, Corvettes, Nova and Chevy II. GMC Caballero and Spirit. Oldsmobile Cutlass, Jetstar, Cruiser 88, Delmont, Delta, Dynamic, F88, Omega, Starfire, Vista and 442. Pontiac Catalina, Firebird, Trans AM, Grand Prix, LeMans, Lemans GTO and Tempest.

 

Bearing overhaul kits are available depending on the extent of the overhaul that you plan, the contents of the kits are described as follows:

  • MRK Kits (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 available separately in sets.
  • DTSBK Overhaul Kits (RWD): Input shaft bearings, main shaft bearings, Counter shaft bearings, pocket bearings, shift fork inserts, gaskets, seals and small parts (where applicable). Order extension housing bushing separately.

    Information and parts are provide for the following Transmission: Muncie M21 / M22 4 Speed (RWD), an illustrated parts drawing for the M21 is provided.

IDENTIFICATION - Aluminum case, extension housing and side cover. The side cover has 7 bolts and 2 shifter cams. The synchro rings have 36 teeth and the unit has a 4-step cluster gear. Reverse gears are helical cut and are located on the extension housing.

 

We provide parts in three separate categories for the Muncie M21 / M22 4 Speed: Overhaul kits by application include standard kits, heavy duty kits for more horsepower and "WS" kits that include both bearings and syncro rings as well as gaskets and seal for Buick, Chevrolet, GMC, Oldsmobile and Pontiac. Plus we off a large selection of miscellaneous hard parts.

IDENTIFICATION - Aluminum case, extension housing and side cover. The side cover has 7 bolts and 2 shifter cams. The synchro rings have 36 teeth and the unit has a 4-step cluster gear. Reverse gears are helical cut and are located on the extension housing. M-21 close ratio, and the extra heavy duty close ratio" M-22, also known as the "Rock Crusher".  The M-22 was generally installed behind severely powerful (high torque) big-block engines. The M-22 is distinguished from an M-21 by the angle of the gear teeth. The M-22 has "straight cut" gears. This make the transmission tend to be noiser (whines or howls almost like a Crusher). The M-21 has a higher pitch angle on its gear teeth.
 

The close ratio gearboxs generally came with 3.73+ gear ratio'ed cars. 3.55 geared and higher (numerically lower) cars used the wide ratio gearbox.  Identification and ratio information is provide below these groves are typically cut across the clutch spline on the input shaft:

 

 
Muncie 4speed
   m21_m22illustration_large.jpg
Number of ID Groves

1st

2nd

3rd

4th
No groves

2.58

1.91

1.48

1.00
1 grove

2.20

1.64

1.28

1.00
2 grove

2.52

1.88

1.48

1.00

 

SYNCHRO RING KIT      
  ASK130 Synchro Ring Kit Rings with Step 1963-74
MISCELLANOUS KITS      
  K100130-8 Gasket and Seal Kit Included in MRK & DTSBK Kits 1963-74
  DK130 Dog & Spring Kit Included in MRK Kits 1963-74

 

 Overhaul kits by application        
  MODEL CYL. ENG YEAR DESCRIPTION   OVERHAUL KIT PART #
   OVERHAUL KIT W/SYNCRO RINGS PART #
BUICK                
  SPECIAL, SPECIAL DELUXE, GS, LESABRE, WILDCAT, ELECTRA, CENTURY, CENTURION, SKYLARK and REGAL (1979 and older)
    8 cyl 300ci 1967 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 340ci 1967 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 3OOci 1967 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 340ci 1967 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cy! 400ci 1967-70 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cy! 400ci 1967-70 1" diameter countershaft pin max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 350ci 1968-73 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cy! 350ci 1968-73 1 " diameter countershaft pin max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cy! 455ci 1971-73 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cy! 455ci 1971-73 1 " diameter countershaft pin max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
CHEVROLET            
  BEL AIR, BISCAYNE and IMPALA        
    8cyl 283ci 1965-67 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8cyl 283ci 1965-67 1" diameter countershaft pin 80mm O.D. input bearingmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 327ci 1965-69 diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8cyl 327ci 1965-69 diameter countershaft pin 80mm O.D. input bearing1" diameter countershaft pin DTS-BK116HD   DTS-BK116HDWS
    8cyl 396ci 1966-69 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8cyl 427ci 1966-69 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8cyl 427ci 1966-69 1" diameter countershaft pin 80mm O.D. input bearingmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 396ci 1966-69 1" diameter countershaft pin 80mm O.D. input bearing max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 350ci 1968-71 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8cyl 350ci 1968-71 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116HD   DTS-BK116HDWS
  CAMARO              
    8cyl 283ci 1967 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8 cyi 283ci 1967 1" diameter countershaft pin 80mm O.D. input bearingmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 402ci 1972 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8cyl 402ci 1972 1" diameter countershaft pin 80mm O.D. input bearingmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyi 327ci 1967-69 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8 cyi 327ci 1967-69 1" diameter countershaft pin 80mm O.D. input bearingmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyi 396ci 1967-71 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8 cyi 396ci 1967-71 1" diameter countershaft pin 80mm O.D. input bearingmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyi 350ci 1967-74 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8 cyi 350ci 1967-74 1" diameter countershaft pin 80mm O.D. input bearingmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyi 302ci 1968-70 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8 cyi 302ci 1968-70 1" diameter countershaft pin 80mm O.D. input bearingmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
  CHEVELLE, EL CAMINO and MALIBU        
    8cyl 400ci 1970 1 " diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cyl 400ci 1970 1 " diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 402ci 1972 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cyl 402ci 1972 max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 283ci 1965-67 1" diameter countershaft pin 80mm O.D. input bearing DTS-BK116   DTS-BK116WS
    8 cyl 283ci 1965-67 1" diameter countershaft pin 80mm O.D. input bearingmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 327ci 1967-69 1 " diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 327ci 1967-69 1 " diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 396ci 1967-71 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cyl 396ci 1967-71 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 350ci 1967-74 1 " diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 350ci 1967-74 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 454ci 1970-74     DTS-BK116   DTS-BK116WS
    8cyl 454ci 1970-74 max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
  CORVETTE              
    8cyl 327ci 1965-68 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cyl 327ci 1965-68 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 427ci 1966-69 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cyl 427ci 1966-69 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 350ci 1967-74 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cyl 350ci 1967-74 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 454ci 1970-74 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cyl 454ci 1970-74 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
  NOVA and CHEVY II            
    8 cyl 283ci 1965-67 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 283ci 1965-67 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 327ci 1965-69 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 327ci 1965-69 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 396ci 1967-71 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 396ci 1967-71 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 350ci 1968-74 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 350ci 1968-74 1" diameter countershaft pinmax load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
GMC              
  CABALLERO and SPIRIT        
    8cyl 402ci 1971-72     DTS-BK116   DTS-BK116WS
    8cyl 402ci 1971-72 max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 307ci 1971-73     DTS-BK116   DTS-BK116WS
    8cyl 307ci 1971-73 max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 350ci 1971-74     DTS-BK116   DTS-BK116WS
    8cyl 454ci 1971-74     DTS-BK116   DTS-BK116WS
    8cyl 350ci 1971-74 max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 454ci 1971-74 max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
OLDSMOBILE            
  CUTLASS JETSTAR, CRUISER 88, DELMONT, DELTA, DYNAMIC, F88, OMEGA, STARFIRE, VISTA, and 442
    8 cyl 330ci 1965-67 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 330ci 1965-67 7/8" diameter countershaft pin   DTS-BK117   DTS-BK117WS
    8 cyl 455ci 1965-73     DTS-BK116   DTS-BK116WS
    8 cyl 455ci 1965-73 max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 400ci 1966-70     DTS-BK116   DTS-BK116WS
    8 cyl 425ci 1966-70 4spd, RWD, M21 , Muncie, aluminum case, 7 bolt side cover DTS-BK116   DTS-BK116WS
    8 cyl 400ci 1966-70 max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 350ci 1968-73     DTS-BK116   DTS-BK116WS
    8 cyl 350ci 1968-73 max load front and rear mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
PONTIAC            
  CATALINA              
    8 cyl 326ci 1965 7/8" diameter countershaft pin   DTS-BK117   DTS-BK117WS
    8 cyl 389ci 1965 7/8" diameter countershaft pin   DTS-BK117   DTS-BK117WS
    8 cyl 389ci 1965-66 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 389ci 1965-66 max load input and mainshaft bearings1" diameter countershaft pin DTS-BK116HD   DTS-BK116HDWS
    8 cyl 326ci 1965-67 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 326ci 1965-67 max load input and mainshaft bearings1" diameter countershaft pin DTS-BK116HD   DTS-BK116HDWS
    8 cyl 428ci 1967-69 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 428ci 1967-69 1" diameter countershaft pinmax load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 400ci 1967-72 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 400ci 1967-72 1" diameter countershaft pinmax load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 350ci 1970-72 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 455ci 1970-72 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 350ci 1970-72 max load input and mainshaft bearings1" diameter countershaft pin DTS-BK116HD   DTS-BK116HDWS
    8 cyl 455ci 1970-72 1" diameter countershaft pin max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
  FIREBIRD and TRANS AM          
    8cyl 326ci 1967     DTS-BK116   DTS-BK116WS
    8cyl 326ci 1967 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 400ci 1967-74     DTS-BK116   DTS-BK116WS
    8cyl 400ci 1967-74 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 350ci 1968-74   DTS-BK116   DTS-BK116WS
    8cyl 350ci 1968-74 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 455ci 1973-74     DTS-BK116   DTS-BK116WS
    8 cyl 455ci 1973-74 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
  GRAND PRIX              
    8 cyl 326ci 1965 7/8" diameter countershaft pin   DTS-BK117   DTS-BK117WS
    8 cyl 326ci 1965-67 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 326ci 1965-67 1" diameter countershaft pinmax load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 389ci 1965 7/8" diameter countershaft pin   DTS-BK117   DTS-BK117WS
    8cyl 350ci 1 970-72 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 389ci 1965-66 1 " diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8cyl 389ci 1965-66 1" diameter countershaft pinmax load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 428ci 1967-69     DTS-BK116   DTS-BK116WS
    8cyl 428ci 1967-69 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 400ci 1967-72     DTS-BK116   DTS-BK116WS
    8cyl 400ci 1967-72 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8cyl 350ci 1970-72     DTS-BK116   DTS-BK116WS
    8cyl 455ci 1970-72     DTS-BK116   DTS-BK116WS
    8cyl 455ci 1970-72 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
  LEMANS, LEMANS GTO and TEMPEST        
    8 cyl 326ci 1965 7/8" diameter countershaft pin   DTS-BK117   DTS-BK117WS
    8 cyl 389ci 1964-65 7/8" diameter countershaft pin   DTS-BK117   DTS-BK117WS
    8 cyl 389ci 1965-66 1" diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 389ci 1965-66 1" diameter countershaft pinmax load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 326ci 1965-67 1 " diameter countershaft pin   DTS-BK116   DTS-BK116WS
    8 cyl 400ci 1966-74 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 400ci 1967-74     DTS-BK116   DTS-BK116WS
    8 cyl 350ci 1968-74     DTS-BK116   DTS-BK116WS
    8 cyl 350ci 1968-74 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS
    8 cyl 455ci 1970-73     DTS-BK116   DTS-BK116WS
    8 cyl 455ci 1970-73 max load input and mainshaft bearings DTS-BK116HD   DTS-BK116HDWS

 

  PART NUMBER DESCRIPTION TYPE YEARS
MISCELLANOUS PARTS      
  K100130-8 Gasket and Seal Kit   1963-74
DWG. REF#      
  NAP45008 Rear Bushing 27 Spline Output 1963-74
  NAP201449 Rear Bushing 32 Spline Output 1963-74
11 TRS304760 Case, M20 Muncie 7/8" Pin    
11 TRS304760A Case, M21 Muncie 1" Pin    
42 TRS304672 Mainshaft Muncie 21 spline    
42 TRS304672A Mainshaft Muncie 32 spline    
38 TRS304703K 3-4 Sync Assy, Complete with Rings Muncie    
3 TRS304735 Front Retainer Muncie    
30 TRS304674 Cluster Gear, R27-22-19-17, Small Pin Close Ratio M20    
30 TRS304674A Cluster Gear, R29-22-17, Small Pin, Wide Ratio M20    
30 TRS304674B Cluster Gear, R25-22-19-17, Big Pin Wide Ratio M21    
30 TRS304674C Cluster Gear, R27-22-19-17, Big Pin, Close Ratio M21    
30 TRS304674D Cluster Gear, R27-22-19-17, M22 Close Ratio M22    
71 TRS304819 Reverse Idler Muncie    
39 TRS304583 3rd Gear, 27t Muncie    
39 TRS304583A 3rd Gear M22 , 27t    
43 TRS304581 1st Gear, Muncie 36t    
43 TRS304581A 1st Gear, M22 36t    
43 ALT 18-410-014 1st Gear Kit M22 Updated: Gear, Spacer, Bushing, Bearing    
90 TRS304641 Slider, Muncie Torque Lock Style    
13 TRS304670 Input Shaft, 26t 10 Splines, Muncie Close Ratio    
13 TRS304670A Input Shaft, 24t, 10 Splines, Muncie Wide Ratio    
13 TRS304670B Input Shaft, 21t, 10 Splines, Muncie Wide Ratio    
13 TRS304670C Input Shaft, 21t, 26 Splines, Muncie Wide Ratio    
13 TRS304670D Input Shaft, 26t 26 Splines, Muncie Close Ratio    
13 TRS304670E Input Shaft, 26t, 26 Splines M22 Close Ratio    
13 TRS304670F Input Shaft, 26t, 10 Splines M22 Close Ratio    
40 TRS304582 2nd Gear, 30T Muncie    
40 TRS304582A 2nd Gear, 30T M22    
52 TRS304587 Reverse Gear, 35T Muncie    
91 ALT 18-672-001 Iron Support Plate Muncie    
55 TRS304772A Tail Housing, for 32 spline shaft Muncie    
55 TRS304772 Tail Housing, for 27 Spline haft (pass. Side speedo) Muncie    
92 TRS304628A Reverse Lever, Internal Threads Muncie    
92 TRS304628 Reverse Lever, External Threads Muncie    
66 TRS304756K * Side Cover Kit, 3/8" Internal Threads Muncie    
66 TRS304756K * Side Cover Kit, 3/8" External Threads Muncie    
    *Each Kit includes: Side Cover, pivot Pin, Interlock Scissors, Retaining Clip, Shift Shafts, 4 Bearings and 2 Shift Shaft Seals
17 TRS304841 Shift Fork Muncie    
79 ALT 7410 Shifter Seal Kit Muncie    
41 TRS304701K 1-2 Syncro Assy Complete with Rings Muncie    
94 TRS304798 Input Nut Muncie    
95 TRS304267 Pocket Bearing With Cage Muncie    
98 TRS304041 First Gear Bushing Muncie    
96 TRS304997A Drive Speedo Gear 8t 1.18" ID 1.84" OD Muncie    
96 TRS304997 Drive Speedo Gear 8t 1.18" ID 1.76" OD Muncie    
96 ALT 3978758 Drive Speedo Gear, 8t 1.41" ID 1.84" OD Muncie    
97 ALT 3912195 Counter Shaft Spacer, 1" Muncie    
32 TRS304485B Cluster Pin 7/8" dia. M20 Muncie    
32 TRS304485A Cluster Pin 1" dia M21 Muncie    
73 TRS304819A Front Idler Gear 18t M22    
67 TRS304820 Reverse Idler Shaft Muncie    
  TRS304699 Input Bearing Slinger Muncie    
  TRS304460 Input Nut Wrench Muncie    
  TRS304580 M20 Gear Kit 7/8" C/Shaft, 10 spl., Wide Ratio 2.56 1st Gear    
  TRS304580A M20 Gear Kit 1" C/shaft, 10 spl., Wide Ratio 2.52 1st Gear    
  TRS304580AA GK-M20 Gear kit 1" c/shaft, 26spl., Wide Ratio 2.52 1st Gear    
  ALT GK-M21 M21 Gear kit 7/8" C/Shaft, 10 spl., Close Ratio 2.20 1st Gear    
  ALT GK-M21A M21 Gear Kit 1" C/Shaft, 10spl., Close Ratio 2.20 1st Gear    
  ALT GK-M21B M21 Gear Kit 1" C/Shaft, 26spl., Close Ratio 2.20 1st Gear    
  ALT GK-M22 M22 Gear Kit to convert a M21 (10 spline input)    
  ALT GK-M22A M22 Gear Kit to convert a M21 (26 Spline Input    
  ALT GK-M22B M22 Gear Kit to convert a M21 (26 Spline input, Wide Ratio)    
  ALT SP297-50 Muncie Small Parts Kit M20    
  ALT SP297-50A Muncie Small Parts Kit , M21 / M22    

Kit m21_mw_t297ramk.jpg