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Audi A8 Transmission Removal and Replacement

If you decide to go crazy and remove your transmission by yourself, you might want read this. I don't have a step-by-step procedure, but if I remember correctly, this should be close. Please don't break anything, but if you do, don't blame me! ;-)

Note from editor: Thanks very much to Gabor (tozoM8) for providing this procedure! Please look at the other sections of automatic transmission on, it has a lot of supporting procedures.

First roll at least one window down.

Disconnect the battery. Have your code number for your radio handy.

If you will have your car on the lift during the whole removal and replacement, you don't have to secure the engine from the top.

If you have to take the car off of the lift (waiting for the rebuilt transmission, torque converter or any other reason), you will have to support the engine form the top. I've made a simple engine support tool. Remember, your aluminum fenders are not strong enough to hold the engine with a general transmission support tool. You need one that supports the engine by sitting on the struts.

Remove the two plastic covers on the passenger's side (one by the ECU and one by the air box).

Remove the two covers by the driver's side (one by the coolant reservoir and one by the brake master cylinder).

Remove the plastic intake hose (between the air box and the TB). Reach down behind the engine on both sides and disconnect the 2 upper O2 sensors. It is a black, flat plastic connector with 3 wires.

Disconnect the two rear O2 sensors which are located under the front seats, under the carpet.

Now your car is ready to be lifted in the air. Loosen the front wheel lug nuts.

Raise the car at least 20” off the ground.

Take the two front wheels off.

Raise the car up, so you can walk under it comfortably.

Drain the transmission fluid. (11)

Remove the belly pan if your car has one.

Remove the exhaust system. Start with the O2 sensor cables. Pull the rubber plugs and pull down the cables from the cabin. Loosen the 4 bolts in the exhaust clamps. (13)

Remove the rear part of the exhaust system.

Remove the catalic converter bolts (12).

There is a biscuit between the two flanges. Remove bolt (14).

Remove the two heat shields that protects the drive shaft. Remove the heat shield, that protects the rear transmission output flange (18).

Remove the 6 bolts that holds the drive shaft to the output flange (19). Put a rag over the drive shaft CV joint, it is greasy.

Disconnect the output speed sensor. It is located on the rear of passenger's side on the transmission.

Put a support under the engine by the oil pan.

Put another support under the center differential housing (20).

Put the third support under the sub frame.

Disconnect the front lower control arm from the sub frame (1). Remove the sway bar bolt (2).

Leave the rear control arm on the sub frame, disconnect it by the wheel by popping the ball joint at the lower shock assembly connection.

Remove (9) 4 bolts, (10) 6 bolts, mark the plate to the body with a sharpie.

Remove (28) 4 bolts, that hold the front engine supports to the sub frame.

Remove (15) 4 big bolts, that hold the sub frame to the car.

Remove sub frame, the rear control arms and the sway bar stays with the sub frame.

Remove the bolts from the inner CV joints. (4) 6 bolts on each side.

Remove the heat shield from the transmission above the axles. (5) 3 bolts on each side.

Remove the exhaust down pipe on both sides (29). You will need a 13mm socket with a looooong extension. When you have the transmission out you will have great access to the rear cam seals, cooler hoses and the famous center cowl drains.

Disconnect (6) wheel speed sensor, (7) engine speed sensor, (27) transmission cable, (26) F125 switch.

Remove the transmission mounts on both sides. 3 bolts each side.

Pop the shifter cable off of the transmission shifter lever, behind the F125 switch. Remove the 2 bolts, that holds the cable to the transmission.

On the driver's side, disconnect the transmission cooler lines from the transmission.

Remove the engine support on the passenger's side (17).

Remove the 2 bolts, that holds the (+) cable (18).

Disconnect the cable from the starter.

Remove the starter. (16) and one bolt from the transmission side.

With a long pry bar, carefully turn the flex plate (pushing upwards) until you see the torque converter bolt. (24) Remove it and turn the flex plate 120degrees, then one more time 120 degrees.

Put a transmission jack under the transmission and secure it. The transmission is 350lbs, so make sure that it will not fall on your toe. That would hurt!

Remove the stand from under the center differential housing.

Remove the transmission bolts around the bell housing. I think there are 9 bolts, 2 or 3 of them are on the front from the engine.

Start to lower the transmission jack. You might have to wiggle it a little, but it will come off from the engine.

Carefully lower the transmission jack. If you have a pre-facelift, watch for the transmission breather hose. It comes from the back of the transmission and goes up right behind the throttle body.

That's it, you've got the transmission out. Now you can rebuild it or replace it with a rebuilt unit.

Don't forget to send your torque converter out for a rebuild.

When you have your newly rebuilt transmission on the transmission jack, install the torque converter on the transmission.

Lubricate the TC shaft, put it on the main shaft, hold it by the pilot shaft and start to turn it.

This is very important, it has to go on the transmission all the way. 3 clicks. The first 2 clicks are the transmission shafts.

The last click is the TC shaft engaging with the transmission pump. I have to say it again. THIS IS VERY IMPORTANT! If the pump is not engaged and you try to pull the transmission to the engine with the bell housing bolts, the TC will crush the transmission pump.

Installation is opposite of removal.

2007 Audi S3

Dynamism, sportiness and sophistication – the Audi A3 holds an outstanding position in the premium compact class. Now its top-of-the-range version is ready to go, the new Audi S3 boasting 195 kW (265 bhp) and quattro permanent four-wheel drive.

2007 Audi S3

With its sparkling performance it pursues the ideal of pure driving pleasure coupled simultaneously with excellent everyday practicality – like all Audi S models.

The S3 redefines the standards of its class – at the level of a sports car. The sprint to 100 km/h is accomplished in 5.7 seconds, and acceleration is only halted on reaching 250 km/h. Aggressively hard-hitting, free-revving and with a sonorous acoustic profile, the powerful two-litre, turbocharged four-cylinder unit with FSI petrol direct injection proves to be a smooth, high-performance engine.

This power is transmitted by the six-speed gearbox and quattro permanent four-wheel drive to large alloy wheels with an 18-inch diameter. The new S sports suspension system on the S3 enables an extremely sporty driving style combined with the ultimate in comfort. This sporty compact model responds actively to steering movements, exhibits precise and safe handling characteristics and, thanks to quattro technology, enables maximum acceleration out of bends.

The dynamic potential of this three-door sports car is obvious at first glance. The single-frame grille sports chrome trim, the front skirt has a spoiler with large air-intakes and the side sills have been restyled. There is a contrasting platinum grey diffuser built into the rear skirt, along with two S-style oval chrome tailpipes. Aluminium-look door mirrors and a body-colour roof spoiler give added impact to the visual statement.

Interior: Sporty atmosphere

The interior conveys an atmosphere of sportiness, with materials of the highest quality and painstaking craftsmanship. The elements that dominate the styling are the sports seats with prominent side sections, the black headlining, also available in silver, and the instrument cluster with its special dials and needles.

The pedals, gear knob and air vents are in aluminium look, the inlays are in Piano finish black, or alternatively Aluminium or Fine grain birch wood grey. The red and silver S3 emblem is to be found on the leather sports steering wheel, in the instrument cluster, on the gear knob and on the door sill trims. The seats are upholstered in a combination of cloth and leather or, as an option, in Alcantara/leather or completely in leather. The two-tone leather seats are decorated with stitching in the same colour as their centre section.

TFSI in its most powerful form

The power plant of the S3 delivers all that is expected of a powerful sports engine, and does it supremely well. The 2.0 TFSI, which combines direct injection and turbocharger technology, delivers 195 kW (265 bhp) at 6,000 rpm. And at just 2,500 rpm it already musters up an impressive 350 Nm of torque – this pulling power remains constant up to 5,000 rpm. In the combined driving cycle the 2.0 TFSI displays another welcome character trait, consuming just
9.1 litres of fuel over 100 km – further proof of the forward-looking efficiency of TFSI technology developed by Audi.

Compared with the A3, this engine is an advanced version which has undergone fundamental changes. The new turbocharger with its enlarged turbine and compressor rotor generates 1.2 bar of boost pressure – an unusually high figure. A modified intercooler significantly lowers the temperature of the compressed air, thus increasing the air mass necessary for combustion.

Pistons with stronger pins and strengthened connecting rods with new bearings transmit the powerful forces to the crankshaft. The cylinder block has been stiffened up and the head is made of a new, highly heat-resistant alloy.

The exhaust camshaft timing has been adjusted to accommodate the increased power output. High-pressure injectors with an enlarged cross-section squirt the fuel straight into the combustion chamber.

Despite all this progressive engineering, the high-performance turbo weighs in at just 152 kilos, which is less than comparable power plants from direct competitors, and this has a positive effect on the axle load distribution. The compact dimensions of the 2.0 TFSI make it suitable for transverse installation, which brings benefits in terms of the S3’s interior space and luggage capacity.

To go with its sporty nature and firm handling, the new Audi S3 has a six-speed, close-ratio manual gearbox. Gearshift travel has been reduced for the S3, enabling even sportier and more precise gear changes. As is the case for all
Audi S models, the new S3 drives all four wheels by means of quattro permanent four-wheel drive. An electronically controlled multi-plate clutch, positioned at the rear for the benefit of weight balance, distributes the torque as needed – delivering plenty of grip and maximum driving safety. All the components in the drive train have been strengthened to cope with the high level of engine torque

Handling: Lightning-fast reactions

In terms of handling, the Audi S3 exhibits all the qualities of a high-performance sports car; it responds immediately to steering movements and achieves high cornering speeds. The innately sophisticated suspension of the
A3 – with subframes front and rear, triangulated lower wishbones at the front and four-link suspension at the rear – has been further refined.

Springs and shock absorbers are stiffer, and the body sits 25 mm lower than an A3 with standard suspension. Aluminium pivot bearings and wishbones reduce the weight of the front suspension. Stiffer suspension mounts and a sportier characteristic for the electro-mechanical steering convey even greater dynamism and precision. 18-inch alloy wheels and 225/40 tyres ensure firm adhesion to the road surface. A 17-inch brake system with sports brake pads ensure maximum deceleration; the black painted callipers bear S3 emblems.

The extras also include a leather steering wheel with flat-bottomed rim and – in the quattro GmbH range – folding bucket seats. In the infotainment area, Audi is presenting a new generation of audio systems. The premium package is rounded off by universal interfaces for mobile phone and iPod, plus a sound system from Bose. Standard equipment includes deluxe automatic air conditioning, a driver information system with a new lap-timer function, and an anti-theft alarm. Front fog lights and xenon plus headlights with daytime running lights underline the impressive price/performance ratio. The basic price of the 265 bhp Audi S3 in Germany is EUR 35,150.

2008 Audi RS6 Avant

Outstanding top performance and maximum dynamism combined with excellent suitability for everyday use are the impressive features of the new Audi RS 6 Avant, which will be unveiled to the public for the first time at the IAA 2007 in Frankfurt.

A newly developed V10 engine with FSI direct injection and twin turbochargers, permanent quattro four-wheel drive and sports suspension with Dynamic Ride Control DRC set the standard for high-performance vehicles in the luxury class. 580 hp and a maximum torque of 479 ft.-lbs. add up to an unforgettable performance experience. At the same time, the new Audi RS 6 Avant offers a high standard of travel comfort – on long journeys, too.

The Audi RS models from quattro GmbH are the ultimate in sportiness, complemented by powerful and elegant design, exclusive equipment and perfect quality. It has also meanwhile become a good tradition that their sports performance is combined with the high utility value of an Avant: the very first Audi RS2, which appeared in 1993, was only built as an Avant model. Although the unique Audi RS driving sensation can now be experienced in saloon, Avant and Cabriolet models – as is the case with the current RS 4 – customers especially appreciate the combination of dynamism and versatility that an Avant offers.

The new Audi RS 6 will therefore only be available as an Avant to start with, with the unrivalled combination of 580 bhp and a maximum 1,660 litres of luggage space.

The new leader in the performance category

The Audi RS 6 redefines the term “high performance” in the business class. With its 580 hp, it is the most powerful model in the current Audi range and – with the exception of pure racing cars like the Le Mans-winning Audi R10 TDI – the most potent Audi of all time. But not only that: it is also clearly superior to all competitors in the top performance category.

The ten-cylinder V-configuration engine in the RS 6 is based on the V10 powerplants of the Audi S6 and Audi S8, but has been redeveloped in practically every respect to attain the significantly higher level of performance. The twin turbochargers ensure an impressively constant stream of power over the entire engine speed range: the mighty peak torque of 479 ft.-lbs. is available across the entire range from 1,500 to 6,250 rpm; maximum output is available between 6,250 and 6,700 rpm.

The road performance of a super sports car

This powerplant enables the Audi RS 6 Avant to achieve the road performance of a high-performance sports car. It requires just 4.6 seconds for the sprint from a standing start to 62 mph, and reaches the 125 mph mark in a mere 14.9 seconds. Only when the needle touches 155 mph is the propulsive power electronically governed. The power-to-weight ratio, too, matches that of a first-rate sports car: after all, with a vehicle weight of 4,464 pounds – including the dynamic and sure-footed quattro four-wheel drive – every horsepower of the RS 6 Avant has to propel just 7.7 pounds.

The ten-cylinder concept provides the ideal basis for a high-performance unit of this caliber. The V10 is unusually compact with an overall length of 26 inches and is very light with a total weight of 613 pounds. TFSI technology from Audi, the combination of direct injection and turbocharging, ensures efficient power output, based on extensive experience in the field of motor sport: the R8 racing car, a pioneer of TFSI technology, captured a series of victories for the brand with the four rings at Le Mans.

Racing technology for high efficiency

FSI direct injection delivers precisely metered amounts of fuel into the combustion chambers at a pressure of up to 120 bar. This permits a compression ratio of 10.5:1, which is very high for a turbo engine. Remarkably efficient combustion is the result. The engine is thus content with a standard consumption of 13.9 litres – a very good figure in view of the potential offered.

A further feature adopted from racing technology is the dry-sump lubrication system used on the V10. By virtue of the elaborate design of the oil pump module and oil tank, reliable lubrication of all engine components and both turbochargers is guaranteed, even with constant lateral acceleration of 1.2 g.

Thanks to FSI technology and the optimised design of the turbocharger and air ducts, the ten-cylinder unit is extremely responsive and converts minimum movements of the throttle into dynamic acceleration. Yet the twin turbo is by no means a rough-and-ready sports engine: it runs smoothly and with refinement, as is typical of a ten-cylinder unit. When accelerating, of course, its dual-branch exhaust system with two oval tailpipes produces that sonorous sporty, throaty sound – an essential feature of a high-performance automobile. Those who wish to enhance this daily delight for the ears even further may opt for the alternative sports exhaust system.

tiptronic with exceptionally short shift times

The six-speed tiptronic is the perfect complement to the self-confident, powerful character of the RS 6. Its hydraulics and control system have been optimised to achieve exceptionally short shift times; the ratios have been adapted accordingly. It goes without saying that the new RS 6 transmits its tremendous power to the road via quattro permanent four-wheel drive. The latest generation not only provides substantially more driving safety and stability than a vehicle with rear-wheel drive, it also underscores the distinctly dynamic character of the RS 6.

In its basic setting, the centre differential distributes 40 percent of the power to the front and 60 percent to the rear wheels – this slightly rear-biased setup produces particularly dynamic handling characteristics.

Suspension for performance and comfort

The suspension of the Audi RS 6 has been consistently designed for maximum dynamic performance along with good travelling comfort – on long journeys, too. Shock absorber and spring settings as well as the entire elastokinematics of the four-link front suspension and the trapezoidal-link rear suspension have been adapted to the new level of performance. The characteristics of the servotronic speed-dependent power assistance have also been retuned. The steering is consequently very sensitive and delivers optimum feedback from the road.

All in all, in terms of driving feel the RS 6 combines the precision and cornering ability of a sports car with the relaxed straight-line stability of a comfortable cruiser. The standard Dynamic Ride Control DRC, familiar from the current RS 4 and consistently enhanced, plays a major role here. This system reduces pitching and rolling movements about the longitudinal and transverse axis of the vehicle in a particularly ingenious way – entirely without the aid of electronics and solely according to the laws of fluid dynamics.

An individual driving feel

With Dynamic Ride Control the shock absorbers are connected diagonally with each other via two oil lines and two control valves. Body movement – e.g. rolling when cornering at high speed on an uneven road surface – produces flows of oil, which generate additional damping force. As a result, the RS 6 boasts even more directional control through bends and reacts with substantially more precision to the steering inputs of the driver.

Dynamic Ride Control on the new RS 6 can be supplemented if desired with optional three-stage damping. This allows the driver to select the handling characteristics according to his/her personal preferences or chosen route. In the comfort setting, the sports suspension plus provides remarkable ride comfort, in the dynamic program it adjusts superbly to an enthusiastic driving style and in the sport mode it delivers maximum driving precision.

The sporty setting of the electronic stabilisation program ESP is an ideal match here: the point of intervention is very late, permitting a high degree of driving enjoyment whilst fully maintaining driving safety. Alternatively, the ESP may be completely deactivated.

Ceramic brakes for the exceptional athlete

An athlete of such exceptional calibre as the Audi RS 6 naturally requires an outstanding brake system. The standard 19-inch steel discs have been designed for maximum load. They consist of an aluminium brake-disc chamber and a cast friction ring, both connected with each other in a floating arrangement via metal pins. This design increases thermal stability and reduces weight.

Optionally, in conjunction with 20-inch wheels, a ceramic brake system is available: it boasts discs with an impressive diameter of 16.5 inches at the front and 14.0 inches at the rear, which endure the most extreme thermal loads with ease and have a very long operating life. Equally impressive are the tire sizes: the standard 19-inch wheels with the new 10-spoke design are shod with size 255/40 R 19 tires; the optional 20-inch wheels are fitted with 275/35 R 20 tires.

Self-assured appearance with functional features

Its independent design lends the Audi RS 6 a striking and self-assured look – without any hint of aggression. In fact, the clear front-end design with the remodelled bumper and accentuated apertures evidently follows function: the high-performance powerplant requires a considerable amount of air to breathe as well as for cooling. The fact that it belongs to the RS family is emphasised by the matt aluminium-look single-frame grille featuring a highly polished black guard in a diamond design.

The headlights on the Audi RS 6 are miniature works of art in high-tech terms: to create space in the front apron for additional air flow, the halogen fog lights have been integrated alongside the bi-xenon headlights, optionally with adaptive light, the cornering light function. The LED daytime running lights strip adds a distinctive touch: ten LEDs at the lower edge of each headlight unit lend the Audi RS 6 a striking appearance, by day or night. A flat cover at the top of the headlights sharpens the “look” of the business/sports car. The taillights, too, largely employ LED technology.

Striking design derived from the “Ur-quattro”

The rear of the Audi RS 6 is characterised by the oval exhaust tailpipes and the diffuser-look apron. A roof spoiler completes the aerodynamic fine-tuning of this high-performance vehicle. The side outline is distinguished by wide, flared wheel arches. Like the engine compartment lid, the front wings are made of aluminium in order to reduce weight. They accommodate the mighty wheels of the new Audi RS 6, yet are also reminiscent of a milestone in automotive history: the flat tops of the wheel arches with their clear edges were counted among the design elements of the Audi quattro – the pioneer of permanent four-wheel drive from the year 1980. A metallic/pearl effect paint finish is standard; new colors Sepang Blue, Monza Silver and Monterrey Green are exclusively reserved for the RS 6.

Elegant and exclusive interior

The interior of the new RS 6 offers an impressive synthesis of sporty elegance and exclusiveness. The extremely high standard of craftsmanship typical for Audi is complemented by an equally sporty and elegant combination of top-class materials. Carbon fibre, aluminium, leather and Alcantara create an ambience that is unique even in the world of high-performance cars.

The main control element is and remains the steering wheel: on the RS 6 the customer can choose between the multifunction sports steering wheel with a 3-spoke design and the particularly distinctive flat-bottomed RS sports steering wheel, likewise with multifunction controls and shift paddles for the transmission. The cockpit in the typical RS design additionally features a boost pressure gauge. Displays for boost pressure, oil temperature and lap timer can be called up via the driver information system.

The inlays are made of carbon fibre and edged in aluminium, the cockpit trim gleams with its piano black finish. Additional highlights in the interior are provided by the aluminium-colored keys of the MMI terminal on the centre console, the milled-finish door handles and the aluminium-look sports pedals. The highly contoured sports seats are covered in a combination of leather and Alcantara with an embossed RS 6 emblem or optionally wrapped completely in Silk Nappa or Valcona leather.

Extensive equipment, individual options

This high-performance vehicle naturally deserves an appropriate level of standard equipment. In addition to design and technical elements specific to the RS 6, this includes the audio system with powerful Bose Surround Sound, heated seats at the front and rear, a tire pressure monitoring system and Audi parking system plus. Together with the wide range of high-tech options for the Audi A6 series, every RS 6 can be perfectly matched to the driver’s individual wishes. The Audi RS 6 is consequently a sporty business car with great versatility, making it suitable for a variety of leisure activities, too.