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Home >> BMW >> 2018 >> M4 2D Convertible, Automatic DCT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (On-Vehicle Servicing - (A5S 360R/390R)) >> Removal & Installation >> Removing And Installing Or Replacing Transmission Extension Housing (A5S 360R / 390R)

Removing And Installing Or Replacing Transmission Extension Housing (A5S 360R / 390R)

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NOTE: Numbers in text refer to numbers in figures.
NOTE: After completing work, top up ATF level. Check/top up fluid level in automatic transmission. See CHECKING/TOPPING UP FLUID LEVEL IN AUTOMATIC TRANSMISSION (A5S 360R / 390R, A4S 200R / 310R)  .

Remove complete exhaust system.

Remove heat shields. See Figure and Figure .

Support transmission with special tools 00 2 030 / 24 5 301 / 24 5 305. See Figure .

Release screws. Remove cross-member (1). See Figure . Upon installation, tighten screws to specification. See TORQUE SPECIFICATIONS  .

Release screws. See Figure . Upon installation, replace self-locking nuts. Tighten to specification. See TORQUE SPECIFICATIONS  .

Grip propeller shaft and release nuts. See Figure . Bend propeller shaft downwards at center bearing (1). Detach propeller shaft from transmission output flange and tie back to side on vehicle underbody. Upon installation, tighten nuts to specification. See TORQUE SPECIFICATIONS  .

Version 1 without spring washer: grip output flange (1) with Special Tool (23 0 020). See Fig 1 . Release hexagon nut. Detach output flange (1). Upon installation, replace sealing ring in output flange (1). Install hexagon nut with screw retaining compound. Tighten to specification. See TORQUE SPECIFICATIONS  .

Fig 1: Detaching Output Flange (Version 1)
G00382356Courtesy of BMW OF NORTH AMERICA, INC.

Version 2 with spring washer: release hexagon nut (1) on output flange (2). See Fig 2 . Upon installation, install hexagon nut with screw retaining compound and tighten to specification. See TORQUE SPECIFICATIONS  .

Fig 2: Releasing Hexagon Nut On Output Flange
G00382357Courtesy of BMW OF NORTH AMERICA, INC.

Version 2 with spring washer: remove spring washer (1). See Fig 3 . Remove output flange (2). Upon installation: note installation direction of spring washer (1). Replace sealing ring in output flange (2).

Fig 3: Removing Output Flange (Version 2)
G00382358Courtesy of BMW OF NORTH AMERICA, INC.

Withdraw radial seal (1) with Special Tool (00 5 010). See Fig 4 .

Fig 4: Removing Radial Seal
G00382359Courtesy of BMW OF NORTH AMERICA, INC.

Release screws on transmission extension housing (1). See Fig 5 . Carefully pull off transmission extension housing (1). Upon installation, tighten screws to specification. See TORQUE SPECIFICATIONS  .

Fig 5: Locating Screws On Transmission Extension Housing
G00382360Courtesy of BMW OF NORTH AMERICA, INC.
CAUTION: Existing shim (2) remains fitted and is not recalculated.

Replace gasket between transmission housing (1) and end cover. See Fig 6 .

Fig 6: Replacing Gasket Between Transmission Housing & End Cover
G00382361Courtesy of BMW OF NORTH AMERICA, INC.
CAUTION: If shim is lost: Calculate new shim.

Calculate measurement between contact face (1) and parking gear (2) with Special Tool (00 2 550). See Fig 7 . Calculate the new shim with this measurement from the following figure. See Fig 8 .

Fig 7: Measuring Between Contact Face & Parking Gear
G00382362Courtesy of BMW OF NORTH AMERICA, INC.
Fig 8: Calculating Shim Measurement
G00382363Courtesy of BMW OF NORTH AMERICA, INC.

Installation: coat sealing lips of new radial seal with automatic transmission fluid. Drive in radial seal with Special Tool (24 1 090) until flush. See Fig 9 .

Fig 9: Driving In Radial Seal
G00382364Courtesy of BMW OF NORTH AMERICA, INC.
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