Transmission, Automatic


Diagnose & repair

Trans slip when cooled

Test Torque converter

Torque converter stall speed and drag

Tranny Protection switch

MB722, but very useful diagnose info

Mercedes repair manuals and info

Oil temperature sensor

Automatik überholen Merc W107

Transmission front seal repair

AutoTrans B2 band slip

Brake band actuator leak

Clutch B3 repair

Primary pump repair

Quick Ref trouble shooting (722 based)


by Alan Taylor:

1990 Porsche 928 S4 Auto B2 Piston Failure

928 (MB 722.3) Auto Trans B2 Piston Replace

928 Auto Matic transmission 94642

928 Automatic Torque Converter Check

928 First Gear Start Module

928 Flexplate Migration Sept 2005

928 Flexplate Migration

Porsche 928 auto gearbox akp722

928S4 A28 16 Automatic Transmission Mar05



AT Relay to prevent engine start

Kick down

GTS dynamic kickdown option

First gear starts

More on First Gear starts

Transmission firmness



Transmission pictures collection

Shift cover removal

Replace Gear selector cable

Fluid Filter replacement

ATF fluid level

ATF fluid level (all versions)

Checking ATF fluid level

Filling ATF in the transmission

Tranny gasket leaks

Tranny Brake band piston repair

Tranny Clutch plates repair

Tranny K1 K2 and B2 worn friction

Tranny leaks ATF only after 2 weeks

Shift valves and MB tranny repair

Transmission fluid change

All the filters and their replacements

Transmission filter and seal info



MB Automatic Transmission diagnosis and adjustment

Shifter adjustment

AT cable adjustment

Adjusting control pressure

Vacuum pod for control pressure


Torque converter

How the Torque converter works

Torque converter stall speeds and test

Torque converter seal and oil pump

Torque converter rivets updated



Generic AT info and background

Shifting conditions and speeds info

More on shifting operation

AT theory of operation

Slipping Transmission

Up shifts on a 1989 928S4

Retarding during AT shifts, protect switch

Park Brake

Kickdown (relay) operation



Replacing transmission mounts

Replacing transmission mounts step by step

Transmission Mounts


Attaching the throttle modulator cable at tranny

Shift cable replacement

Transmission serial code and model

Transmission numbers identification

Valve body particle filter

Automatic transmission  on the track?

Transmission heat isolation and sound damper



Note: all of the technical information is provided without any filtering. Any damage caused by using or applying the information is the risk of the reader. The publisher (me) can not take any legal responsibility whatsoever. Please do not use any information from this website if you do not accept this condition.
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