722 Automatic transmission information

denkoleso

09-18-2011, 04:24 AM #45

(09-09-2010, 03:38 AM)majesty78 I´ve talked to an MB Transmission technican today, and must say, that the information posted here is unfortunately false.

The torque which those trannys can handle is NOT validated through the last 2 numbers of the W5A/B... numbers.

There are so many different variances of all aof those transmissions, like 722.1/2/3/4/5/6xx which all have different torque ratings.

So there are per example 722.5 transmissions which are rated up to 1080Nm coming in the 12Cylinder AMG engines, and 722.9 transmissions rated up to 735Nm.

The 722.4 per example is an fully hydraulic actuated transmission (besides 2 soleniods), with brake bands, 722.5 is actually an 722.4 but extended with an 5th gear which is electronically controlled. 722.6 is fully electronic controlled without brake bands but friction discs.

722.623 has per example the above stated 580Nm torque handling capacity, but there are also 722.6xx transmissions rated to only 330Nm...

Regards, Alex

Hi,sorry for my english,I'm automatic transmission rebuilder and mercedes fanatic.Alex,sorry but your technician is no very good.722.5 never was coupled with V12 only 722.3 and 722.6 .722.5 is no 722.4 with OD,but 722.3 with electronicaly aktivated OD,like chrysler transmissions.Most problems in 722.5 is OD,it is cause why rated torque for 722.5 is smaller when for 722.3. The 722.3 is very best transmission in mercedes,if this transmission was with 6.0 v12 and 7.2 v12 it can handle much power.this year in my shop was an W140 7.2 Koenig all internals frictions,steel,bands,planetary was standart,not tuning ,but this engine is
up to 405 kw / 550 HP / 760 nm rated.The 722.4 is "-zoom"copy of 722.3
all clutch packs ,bands is smaller in diameter,inner plate career was aluminium,but valve body is same,oil pump is bearing style,governor helical gears plastic.722.3 and 722.4 is all hydraulik controlled only kickdown is activated with solenoid like in THM400,and 722.5 added solenoid for OD. The 722.6 is the best 5 speed in world (its my opinion,like MB is the best),if you want much torque is no need to upgrade you 722.3 for "cost between 4500 and 6000 dollars to actually do it" is very expensive, best way is to add an controller to 722.6 ,you can bolt on all bellhousings without problems(if you have 722.6 from an s500 you can bolt on bellhousing from l6 and bolt to you 606.912 add fuel Smile

).If this trans work with 6.1 hemi with 606 will too Big Grin

.

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