722.605 overhaul

[oldsinner111]

Next year I'd like to buy a newer low mileage trans,to remove guts,and put into to mine.Mine is a 722.605,I saw somewhere where a guy used a w220 trans to do that.I wonder if the Chrysler Mopar Nag 1s are really in fact 722.6xxs. If so can I use one of them,as they might be more of them?My trrans is fine,but I like to make it new,with my newer engine.

[oldsinner111]

well it seems the only difference is the convertors.They also sell high performance clutches,that are thicker.

[duxthe1]

The size of the planetary carriers and resultant gear ratios can be different, and a stock module wont be happy if you mis-match.

[oldsinner111]

so what trans should I look for? 722.609?One from chrysler 300 v6?

[duxthe1]

Any of the W5A330 should interchange. I wouldn't open one up and reassemble it with the old sprags.

[oldsinner111]

I see alot of low mileage 722.605s but I'd be concerned about seals and gaskets.these trans are to expensive from sun valley

[MAVA]

Nathan,

I wrote about it on the W140 Benzworld forum, yet it has worked fine on V12 and V8 engines. I have never done it on a I6, and cannot say how many pinion gears W140 M104 722.6 equipped cars uses? As the M112(V6) use three,the V8/V12 use four, so in my book it is a matter of comparing the front and rear replacements shafts in the transmission of your car to the different flavors of the W220 or the +2000 W210, and again I do not know how many pinions it has(I6 722.6 cars).

I used at minimum the rebuild kits from many suppliers, and they work well. They are around $200, but the ideal is to use Borg Warner machined frictions or Mercedes frictions not the stamped frictions in the kits. You will need a new Bonded front piston, two new updated sprags.I use CVC torque converters as they use Sonnax parts in them.

The wisest thing is to get the re-builders manual on the 722.6, and look at some YouTubes.

New revised 722.6 service manual - get it while can - Mercedes-Benz Forum

You want to replace all the seals...

Martin

[oldsinner111]

what are sprags? I see rebuilt valve bodies for sale $500.Are they needed too. I have had problem for 4 years now.When my engine is between 50c and 70c the rpm will rise up and down 200 rpms when giving light throttle,til she's warm.I think its a solenoid.They ****ed up the log in at Benzworld so I don't use it much now.

[MAVA]

Sprags are on direction bearings-meaning they freely rotate one direction and the other direction they lock hard, but the 90's 722.6's have a 9-element(or so), and the +2000 722.6 have like 12 to 14 element(or so).Then the third-generation of the 722.6 has a larger sprag. There are two sprags most people lose the first one(if they lose a sprag), and the physical worst case symptom is the tranny slips to neutral to after third gear..

That raise in RPM is common on the 722.6, and you could need a new regulation spring, and new valvebody shift sleave(s) which I'm assuming it is 2-3 shift, but this may be masked by slipping front sprag too.

Regulating Pressure Control Valve Spring - 68942-01 - Sonnax


This a whole kit for all the shifts valves

Master Overlap Control Valve Sleeve Kit - 68942-05K - Sonnax

I think you have a 98 or 99 car. I cannot remember, but you could swap the valvebody on a +2000 car(any engine-even from a Chysler, or jeep) with yours. The transmission computer(TCM) of 98's and 99's should work with no problem..

My 98 S500 has a 2004 W220 S430 100,000mile internals. I did not change frictions, nor did I changed the sprags. I did it to prove the concept, and works fine. I have loged 30,000 miles since I did it, and I have the 2004 valve body in my 98 with a 98 TCM(my TCM has a 97 date code.). All I changed were all the seals from a TransTech $100 kit from R/O/C/K/A/U/T/O. I did put a rebuilt $200 CVC torque converter.

Martin

Make a new screen name, or email this person:

http://www.benzworld.org/forums/w140-s-class/2652738-log-benzworld-another-way.html

or

http://www.benzworld.org/forums/w140-s-class/2687202-trouble-logging.html

Download the atsg manual from post 7

[MAVA]

~~

[oldsinner111]

thanks

[MAVA]

You are welcome, download those manuals..
martin