Getrag F23 transmission
Encyclopedia
The F23 is a five-speed manual transmission
manufactured by Getrag
in Italy. It is designed for transverse engine
applications, primarily by General Motors. It can handle torque
inputs of up to 230 newton metres (170 ft·lbf).
In the U.S. market, General Motors uses the F23 in two versions: the M86 and MG3.
There is now an aftermarket source for limited slip differentials, of the helical-gear, torque-sensing / torque-biasing design.
(RPO) code M86 is rated for lighter vehicles with a maximum gross vehicle weight rating
(GVWR) of 1857 kilograms (4,094 lb).
Applications
Applications
released a Technical Service Bulletin
(TSB #02-07-29-001) addressing a "Grinding/Rattle Type Noise Coming From Transmission". The TSB was intended for the following GM vehicles equipped with the GM Quad 4 (RPO LD9) Engine and Getrag M86/M94 5-Speed Transmissions:
The bulletin continued to explain that there are actually two distinguishable noises which have two very different remedies.
this transmission. If the vehicle is not making any noise when trying to verify the condition, it can be
induced by making several tight left hand circles with the vehicle at normal operating temperature.
Making a sharp right hand turn will usually stop the noise. While the noise is occurring, in order to
distinguish between the two noises, you can press lightly on the clutch pedal without releasing the clutch
and the noise will NOT go away or change. As a second diagnostic aid, while the vehicle is making the
noise, shift to third gear and the noise will stop.
usually most noticeable in first or second gear. While the noise is occurring, if you press lightly on the
clutch pedal without releasing the clutch, the noise will be reduced or eliminated.
General Motors provided a fix for "Noise #1" but stated that "Noise #2" was a characteristic of any car equipped with a manual transmission and that a similar noise could be repeated by lugging the engine. The remedy for "Noise #1" was to overfill the transmission with Saturn Manual Transmission Lubricant from the stock 1.8 quarts to 2.6 quarts. Although this seemed to work for many customers, many other complaints still surfaced and in 2003 General Motors released another TSB urging customers that still have the rattling noise in their transmissions should bring their vehicles in to their nearest General Motors affiliated dealer for a more complex fix. This time, GM Technicians had concluded that gears one and two required additional thrust loads and proceeded to install a wave washer between the blocking ring and speed gears for gears three and four. This indeed fixed the rattle issue once and for all, but has more recently been lamented in many online communities as causing a bigger problem than it solves, as many customers that received this fix reported third and fourth gears grinding from time to time while shifting. Afterwards, many owners of these vehicles have concluded that leaving the transmission alone was for the best, as the rattling noise has been proven to be harmless.
Manual transmission
A manual transmission, also known as a manual gearbox or standard transmission is a type of transmission used in motor vehicle applications...
manufactured by Getrag
Getrag
Getrag is a leading manufacturer of automobile manual transmissions. The company was founded on 1 May 1935, in Ludwigsburg, Germany, by Hermann Hagenmeyer; as the Getriebe und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG...
in Italy. It is designed for transverse engine
Transverse engine
A transverse engine is an engine mounted in a vehicle so that the engine's crankshaft axis is perpendicular to the long axis of the vehicle. Many modern front wheel drive vehicles use this engine mounting configuration...
applications, primarily by General Motors. It can handle torque
Torque
Torque, moment or moment of force , is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist....
inputs of up to 230 newton metres (170 ft·lbf).
In the U.S. market, General Motors uses the F23 in two versions: the M86 and MG3.
There is now an aftermarket source for limited slip differentials, of the helical-gear, torque-sensing / torque-biasing design.
Gear ratios
| final drive | 1 | 2 | 3 | 4 | 5 | R |
|---|---|---|---|---|---|---|
| 3.84 | 3.58 | 2.02 | 1.35 | 0.98 | 0.69 (M86) | 3.31 |
| 0.81 (MG3) |
M86
Regular Production OptionRegular Production Option
A Regular Production Option is a General Motors standard coding for vehicle configuration options. These codes are a combination of 3 alphanumeric characters and refer to a specific option or modification to the vehicle...
(RPO) code M86 is rated for lighter vehicles with a maximum gross vehicle weight rating
Gross vehicle weight rating
A gross vehicle weight rating is the maximum allowable total weight of a road vehicle or trailer when loaded - i.e., including the weight of the vehicle itself plus passengers, and cargo....
(GVWR) of 1857 kilograms (4,094 lb).
Applications
- 2000–2005 Chevrolet CavalierChevrolet CavalierThe Chevrolet Cavalier was a compact automobile produced from 1982 to 2005 by General Motors. Built on the company's J platform, the Cavalier was one of the best-selling cars in the United States throughout its life.- Predecessors :...
- 2005–2007 Chevrolet CobaltChevrolet CobaltThe Chevrolet Cobalt is a compact car introduced by Chevrolet in 2004 for the 2005 model year. The Cobalt replaced both the Cavalier and the Prizm as Chevrolet's compact car....
- 2005–2007 Chevrolet HHRChevrolet HHRThe Chevrolet HHR was a retro-styled station wagon launched by the Chevrolet division of American automaker General Motors at the 2005 Los Angeles Auto Show as a 2006 model — and designed by Bryan Nesbitt. Smaller than the Equinox, the HHR shared the GM Delta platform with the Chevrolet...
- 2000–2005 Pontiac SunfirePontiac SunfireThe Pontiac Sunfire was introduced for the 1995 model year as the compact car to replace the Sunbird. Not only was the name changed, but dramatic styling changes were included as well. The new styling was shared with the redesigned Chevrolet Cavalier...
- 2005–2007 Pontiac G5Pontiac G5The Pontiac G5 is a rebadged Chevrolet Cobalt compact car that was marketed by the Pontiac division of General Motors. It was first introduced in 2004 for the 2005 model year. For 2005 and early 2006, this car was known as the Pontiac Pursuit in the Canadian market, and G5 Pursuit during mid-2006. ...
- 2000–2005 Pontiac Grand AmPontiac Grand AmThe original Grand Am was introduced in the fall of 1972 as a 1973 model. It was based on the GM A platform along with other cars such as the Pontiac LeMans, Pontiac GTO, Chevrolet Chevelle, Buick Century, and the Oldsmobile Cutlass Supreme...
- 2000–2004 Oldsmobile AleroOldsmobile AleroThe Oldsmobile Alero was a compact car produced by the Oldsmobile division of General Motors from 1999 to 2004.The Alero was introduced in spring 1998 as a 1999 model to replace the Achieva and Cutlass. The Alero went into production on April 6, 1998. All Aleros were built in Lansing, Michigan...
- 2003–2007 Saturn IonSaturn IONThe Saturn Ion was a compact car sold by the Saturn marque of American automaker General Motors between the 2003 and 2007 model years. It used the GM Delta platform. The Ion replaced the Saturn S-Series in 2003,...
- Opel CorsaOpel CorsaThe front-wheel drive Opel Corsa was first launched in September 1982 to replace the Opel Kadett C City, and to fill the gap vacated as the Kadett grew in size and price. Built in Zaragoza, Spain, the first Corsas were three-door hatchback and two-door saloon models, with four-door and five-door...
- Opel AstraOpel AstraThe Opel Astra is a small family car engineered and manufactured by the German automaker Opel since 1991.It is branded as Vauxhall Astra in the United Kingdom, the Buick Excelle XT in China and the Chevrolet Astra/Vectra in Latin America...
- 2000–2002 Opel Vectra B
- Opel ComboOpel ComboThe second generation was launched in 2001. While most competitors severed their connections with their subcompact brethren, Opel decided to base the vehicle on the Corsa again. The use of subcompact Gamma platform constrained the overall width of the vehicle. While the general body shape was...
- Opel ZafiraOpel ZafiraThe Opel Zafira is a compact MPV engineered and produced by the German automaker Opel. The Zafira is sold under the Vauxhall marque in the United Kingdom.- Zafira A :...
- Opel TigraOpel TigraThe Opel Tigra name has been applied to two quite different cars engineered and produced by the German automaker Opel, both based on different iterations of the Corsa supermini, the first built in Spain, the second in France. The first Tigra was a small 2+2 coupé, produced from 1994 to 2000. The...
- 2009-2010 Chevrolet CobaltChevrolet CobaltThe Chevrolet Cobalt is a compact car introduced by Chevrolet in 2004 for the 2005 model year. The Cobalt replaced both the Cavalier and the Prizm as Chevrolet's compact car....
with economy 3.63:1 FDR is RPO FY1, otherwise is 3.84:1 - 2009-2010 Chevrolet HHRChevrolet HHRThe Chevrolet HHR was a retro-styled station wagon launched by the Chevrolet division of American automaker General Motors at the 2005 Los Angeles Auto Show as a 2006 model — and designed by Bryan Nesbitt. Smaller than the Equinox, the HHR shared the GM Delta platform with the Chevrolet...
is 3.95:1 FDR
MG3
RPO code MG3 is rated for heavier vehicles with a maximum GVWR of 2030 kilograms (4,475 lb).Applications
- 2004–2007 Saturn VueSaturn VUEThe Saturn Vue is a compact crossover SUV that was sold by General Motors' Saturn marque, and at one time was Saturn's best-selling model. It was the first vehicle to use the GM Theta platform when it was introduced in 2002. A second generation model was launched in 2007 for the 2008 model as a...
Rattling / Grinding
On January 28th, 2002, General MotorsGeneral Motors
General Motors Company , commonly known as GM, formerly incorporated as General Motors Corporation, is an American multinational automotive corporation headquartered in Detroit, Michigan and the world's second-largest automaker in 2010...
released a Technical Service Bulletin
Technical Service Bulletin
Technical Service Bulletins, or TSBs, are recommended procedures for repairing vehicles. Not to be confused with recalls, a TSB is issued by a vehicle manufacturer when there are several occurrences of an unanticipated problem. TSBs can range from vehicle-specific to covering entire product lines...
(TSB #02-07-29-001) addressing a "Grinding/Rattle Type Noise Coming From Transmission". The TSB was intended for the following GM vehicles equipped with the GM Quad 4 (RPO LD9) Engine and Getrag M86/M94 5-Speed Transmissions:
- 2000-2002 Chevrolet CavalierChevrolet CavalierThe Chevrolet Cavalier was a compact automobile produced from 1982 to 2005 by General Motors. Built on the company's J platform, the Cavalier was one of the best-selling cars in the United States throughout its life.- Predecessors :...
- 2001-2002 Oldsmobile AleroOldsmobile AleroThe Oldsmobile Alero was a compact car produced by the Oldsmobile division of General Motors from 1999 to 2004.The Alero was introduced in spring 1998 as a 1999 model to replace the Achieva and Cutlass. The Alero went into production on April 6, 1998. All Aleros were built in Lansing, Michigan...
- 2000-2002 Pontiac SunfirePontiac SunfireThe Pontiac Sunfire was introduced for the 1995 model year as the compact car to replace the Sunbird. Not only was the name changed, but dramatic styling changes were included as well. The new styling was shared with the redesigned Chevrolet Cavalier...
- 2001-2002 Pontiac Grand AmPontiac Grand AmThe original Grand Am was introduced in the fall of 1972 as a 1973 model. It was based on the GM A platform along with other cars such as the Pontiac LeMans, Pontiac GTO, Chevrolet Chevelle, Buick Century, and the Oldsmobile Cutlass Supreme...
The bulletin continued to explain that there are actually two distinguishable noises which have two very different remedies.
- Noise 1: This is a very distinct noise that is usually much louder than the second noise that can be associated with
this transmission. If the vehicle is not making any noise when trying to verify the condition, it can be
induced by making several tight left hand circles with the vehicle at normal operating temperature.
Making a sharp right hand turn will usually stop the noise. While the noise is occurring, in order to
distinguish between the two noises, you can press lightly on the clutch pedal without releasing the clutch
and the noise will NOT go away or change. As a second diagnostic aid, while the vehicle is making the
noise, shift to third gear and the noise will stop.
- Noise 2: This noise, commonly referred to as gear rattle, can be induced by lugging the engine in any gear, but is
usually most noticeable in first or second gear. While the noise is occurring, if you press lightly on the
clutch pedal without releasing the clutch, the noise will be reduced or eliminated.
General Motors provided a fix for "Noise #1" but stated that "Noise #2" was a characteristic of any car equipped with a manual transmission and that a similar noise could be repeated by lugging the engine. The remedy for "Noise #1" was to overfill the transmission with Saturn Manual Transmission Lubricant from the stock 1.8 quarts to 2.6 quarts. Although this seemed to work for many customers, many other complaints still surfaced and in 2003 General Motors released another TSB urging customers that still have the rattling noise in their transmissions should bring their vehicles in to their nearest General Motors affiliated dealer for a more complex fix. This time, GM Technicians had concluded that gears one and two required additional thrust loads and proceeded to install a wave washer between the blocking ring and speed gears for gears three and four. This indeed fixed the rattle issue once and for all, but has more recently been lamented in many online communities as causing a bigger problem than it solves, as many customers that received this fix reported third and fourth gears grinding from time to time while shifting. Afterwards, many owners of these vehicles have concluded that leaving the transmission alone was for the best, as the rattling noise has been proven to be harmless.