New Muncie 4 Speed Transmissions


Muncie Transmission is back!
General Motors stopped installing "Muncie" 4 speeds in 1974. Complete units were able to be purchased from GM until the late 1970's. Parts trickled out of inventory by the late 1980's. With the quality of used Muncie transmissions getting worse in the last 10 years, the idea of making new improved Muncie parts was becoming a reality. We were contacted by Autogear Company (Syracuse NY ) to help them conceptualize newer designed products for the Muncie. First we started with gears, then the Supercase. Soon after design concepts for endurance racing followed with iron midplates, sealed inputs, extra close ratios and rollerized 1st gears. In less than 3 years a complete new 4 speed became possible. With the proper rear end gear a new M22 can handle close to 800HP!

Why should you purchase a new Muncie 4 Speed from us?

We realize that the success of these products has allowed many people to build new transmissions with these products. We are an authorized Autogear distributer as well as value added assembler. Between the Internet and Ebay there are a great deal of people putting together "new" Muncie 4 speeds. The problem is that some may use some new parts mixed with used parts. Some may build units with gears not made by AUTOGEAR. We are also the only company selling our state of the art SPEC-25 Muncie, designed for endurance racing, historic racing and SCCA A-SEDAN classes. When making a decision to purchase, please compare our features listed below.


Muncie Models, Features and Pricing
( all transmissions are 100% all new )

Standard M21 and M20

$1700. USD

New Super Case
New iron mid plate
New rollerized side cover
New Heavy Duty Tailhousing with line honed bushing
Torque locking sliders with matching hardened hubs
All new internals
Hex head sealing plugs
Forged synchro rings
Babbit and nitrided thrust washers.
Dynamic oil feed first gear sleeve
Sealed front bearing w/ std slinger nut design
Universal Shifter Shafts
Standard M22 - M22W M22X
$2025. USD

New Super Case
New iron mid plate
New rollerized and bronze bushed side cover
New Heavy Duty Tailhousing with line honed bushing
Zero rock sliders with matching hardened hubs
All new internals
Hex head sealing plugs
Forged synchro rings
Bronze and nitrided thrust washers.
Anchored countershaft to iron mid plate
Uni-Cluster Counter Gear with no spacer tube
Sealed system with alloy vent case.
Universal Shifter Shafts
 
M22Z
$2100. USD
New Super Case
New iron mid plate
New rollerized and bronze bushed side cover
New Heavy Duty Tailhousing with line honed bushing
Zero rock sliders with matching hardened hubs
All new internals
Hex head sealing plugs
Forged synchro rings
Bronze and nitrided thrust washers.
Anchored countershaft to iron mid plate
Modular Counter Gear with no spacer tube
Sealed system with alloy vent case.
Universal Shifter Shafts
Drag Special
M22 - M22X or M22W
$2200. USD
New THUST BUTTON Super Case
New iron mid plate
New rollerized and bronze bushed side cover
New Heavy Duty Tailhousing with line honed bushing
Zero rock sliders with matching hardened hubs
All new internals
Hex head sealing plugs
Forged synchro rings
Bronze and nitrided thrust washers.
Anchored countershaft to iron mid plate
Modular DS ( Drag Special Gearset ) with heavy duty 1st gear.
9310 Alloy Countershaft stub section.
Sealed system with filtered vent case.
Universal Shifter Shafts
 
Light Weight
M22 M22X or M22W
$2275. USD
New THUST BUTTON Super Case
New iron mid plate
New double bronze bushed side cover
New Heavy Duty Tailhousing with line honed bushing
Caged Counter Gear Needle Bearings
Zero rock Torque Locking sliders with matching hardened hubs
All new internals
Hex head sealing plugs drilled for safety wire
Forged synchro rings
Bronze and nitrided thrust washers.
Anchored countershaft to iron mid plate
Rifle drilled mainshaft ( reduces 1 lb of weight and aids in cooling)
Modular M22 style gearset with rollerized 1st speed gear
Sealed system with alloy vent case.
Universal Shifter Shafts
 

SPEC-25
M22 or M22X
A-SEDAN

$2995. USD

New THUST BUTTON Super Case
New iron mid plate
New double bronze bushed side cover
New Heavy Duty Tailhousing with line honed bushing
Zero rock sliders with matching hardened hubs level 3 clearance
Caged Counter Gear Needle Bearings
All new internals
Hex head sealing plugs drilled for safety wire
Forged synchro rings
Shot peened and surface enhanced gearset ( improves strength reduces fatique)
CT Telfon Coated case ( reduces heat )
Bronze and nitrided thrust washers.
Anchored countershaft to iron mid plate
Rifle drilled mainshaft ( reduces 1 lb of weight and aids in cooling)
Modular M22 style gearset with rollerized 1st speed gear
Sealed system with alloy vent case.
Universal Shifter Shafts
Model Type Ratios
M20 2.52 1.88 1.46 1.00
M21 2.20 1.64 1.28 1.00
M22 2.20 1.64 1.28 1.00
M22W - DS 2.56 1.88 1.37 1.00
M22W 2.56 1.75 1.37 1.00
M22X 2.20 1.51 1.17 1.00
M22Z 2.98 2.04 1.47 1.00
SPEC-25 2.20 1.64 1.28 1.00
SPEC-25X 2.20 1.51 1.17 1.00
A-SEDAN 2.56 1.90 1.37 1.00

 

The new Muncie style 4 speed even in base form is a huge improvement over factory units. Each unit starts with a completely new gearset and all internals blueprinted by us. The internals are installed in the Supercase, iron midplate and heavy duty tail. The unit is buttoned up with a new side cover assembly and forks. The side cover assembly has shifter shafts that ride on roller bearings and in some models bushings. This improves shift feel. Every component is new, there is no core charge.

You can obtain a new transmission as a standard replacement unit with a 10 spline input and 27 spline output in M20, M21, and M22 ratios. You can have the same ratios in the 26 spline input and 32 spline output or a mix of spline combinations at no additional cost.

To read more specs, price a new transmission and see ratio charts visit our ONLINE STORE.


New gears get cleaned and inspected

Gears deburred and fitted with forged rings

A new M20 goes together

New hardware and front retainer locks

All units include new speedo drives and hardware

Factory and Hurst shifters fit perfectly

New design cover with bolt on style shift shafts

Inside shows new detents and pinned shafts, these are then welded.


Countershaft drilled and tapped


Countershaft anchors to iron midplate
New design side cover uses roller bearings inside the shifter shaft bore. Typically used in high tech German transmissions, this design promotes positive shifting and eliminates cover bore wear. The improved concentricity of the shifter shaft to cover bore relationship eliminates shaft oil leaks. Some models come with bushings and rollers and all bushings.


Typical 26 / 32 Spline Transmission


Base 10 / 27 Spline Transmission



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