Transmission

The F23 is a five-speed manual transmission manufactured by Getrag in Italy.[citation needed] It is designed for transverse engine applications, primarily by General Motors. It can handle torque inputs of over 230 newton-metres (170 lbf⋅ft). The F23 has one roll pin, two gearsets on each of three parallel shafts – the input shaft, the output shaft, and the intermediate shaft. This three-shaft (also called three-axis) design results in a very short axial length for better packaging. There are three separate shift fork shafts, which hold three shift forks to activate the synchronizer rings for the two gearsets on each of the three gear shafts. The shift forks are activated by a cable system. The clutch release bearing is operated by a concentric slave cylinder that surrounds the input shaft in the clutch housing. A concentric slave cylinder allows more linear clutch feel than an external lever-actuated clutch and release bearing. The input shaft carries the 3rd and 4th gear synchronizer, the intermediate shaft carries the 1st and 2nd gear synchronizer, and the output shaft carries the 5th and reverse gear synchronizer. The aluminium case contains a conventional final drive gearset. There are sintered bronze double-cone blocker rings on the synchronizers for 1st and 2nd gears, while 3rd and 4th gears use carbon fiber blocker rings, and 5th and Reverse gears use molybdenum on their synchronizers. Carbon and molybdenum are extremely durable friction surfaces that remain stable even under extreme heat.[1] In the U.S. market, General Motors uses the F23 in two versions (with several application variations): the M86/M94 and MG3. There is now an aftermarket source for limited slip differentials, of the helical-gear, torque-sensing / torque-biasing design. It also has a following in the ecotec racing community for being able to handle 700 hp with an LSD insert and only costing about $200. It does not have the problems that plague the F-35 found in the SS, so it makes for a good transmission swap candidate.

The GM MR6/F40 six-speed manual transaxle was first developed for GM Europe by Saab Powertrain, for use in Saab and Opel applications. Originally a design developed by GM Powertrain Sweden Södertälje - Europe six-speed manual transaxle was originally built by Saab in its transmission plant in Gothenburg, Sweden (2002-2003) but production was moved to Opel in Rüsselsheim am Main, Germany since 2004. Its first use in Europe was the new Saab 9-3 2003-2011, while first use in North America was the same, in the Aero model. It is also used in 9-5 2010-2012 models.

The "MH1" 4T80-E is able to handle vehicles up to 8000 lb (3628.74 kg) GVWR. The final drive ratio is 3.11:1, 3.48:1, or 3.71:1. The 4T80 uses a viscous torque converter clutch, which was replaced with EC3 (electronically controlled converter clutch) in 2005. Transmission broadcast codes in 2005 for the ECCC transmission are 5ABN and 5MMN. The 4T80-E is a hydramatic transmission and was developed for use with V8 front-wheel-drive cars, specifically for the Cadillac Northstar engine. It was designed with extreme power handling capabilities at the time. The 4T80-E debuted in the Cadillac Allanté in 1993 along with the Northstar Double Overhead Camshaft (DOHC) V8. It reportedly cost 80% more than a similar GM 4T60 transmission and weighed 60 lb (27 kg) more. This transaxle has been used in many of GM's front drive large sedans. The Cadillac Division had exclusive usage of the 4T80-E until the 1995 Oldsmobile Aurora debuted. The Aurora had the 4.0L version of the Northstar V8 coupled to a 4T80-E. It wasn't until 2004 that Pontiac got usage of this transaxle in the Bonneville GXP which employed a 275 horsepower version of the Northstar 4.6L V8. The 4T80-E was last used in 2011 on the Cadillac DTS and the Buick Lucerne (when equipped with the 4.6L Northstar).

General Motors and Ford Motor Company cooperated in 2002 to create a new automatic transaxle, designed for transverse engine applications in cars. The companies jointly committed to investing US$720 million in their manufacturing plants to support the new transmission. Each company will name and manufacture the transmission separately: Ford builds the 6F50 and 6F55 along with the 6F35 (related to the GM 6T40 transmission) at their Van Dyke Transmission Plant in Sterling Heights, Michigan, and in the future at Sharonville Transmission in Sharonville, Ohio. GM builds the 6T70, 6T75 and 6T80 at Warren Transmission in Warren, Michigan with production starting in July 2006.[1] Ford claims the 6F50 is designed to handle 300 hp (224 kW) and 280 ft·lbf (380 N·m), while General Motors rates their 6T70 to 315 hp (235 kW) and 280 lb⋅ft (380 N⋅m), the 6T75 to 315 hp (235 kW) and 300 lb⋅ft (407 N⋅m), and the 6T80 to 410 hp (306 kW) and 369 lb⋅ft (500 N⋅m). GM lists the wet (with fluids) weight of the 6T70/75/80 to be between 102 kg (225 lb) and 104.7 kg (231 lb). Ford appears not to have made a public statement regarding the 6F55's maximum capabilities, but uses it in AWD in the Taurus SHO with an engine rated at 272 kW (370 PS; 365 hp) and 475 N·m (350 lb·ft) of torque (Final drive 2.77:1 standard or 3.16:1 with SHO Performance Pckage), as well as the tenth generation Lincoln Continental with an engine rated at 400 hp (298 kW; 406 PS) and 400 lb⋅ft (542 N⋅m). The first application of the technology is in the 2007 Ford Edge and Lincoln MKX crossover SUVs, as well as the Saturn Aura sedan and the Saturn Outlook crossover. It was also used for the Pontiac G6 GTP models and the GMC Acadia models for 2007. Prior to 2009, this transmission had issues caused by a very weak 3,5,R wave plate, which made this transmission prone to failure in GM products. Updated wave plates were released for many clutches in 6T70. The old design wave plates were not stress relieved and could break with use.