Rebuilding/Upgrading 722.643 with 722.649 parts
Here is what I found so far. I was hoping (shooting in the dark) that someone has done this before... Anyone is welcome to chime in if you have done this upgrade/rebuild.
722.649 from W221 S65 AMG (221.179)
B1 - 52108507AA/05102095AA (qty.3) 140 272 00 25 140 272 00 25 (qty 4)
B2 - 52108015AA/05080237AA (qty.4) 140 272 04 25 220 272 17 26 (qty 5)
B3 - 52108573AA/05080253AA/52108357AA (qty.5) 140 272 04 25 220 272 07 25 (qty 5)
K1 - 5210825AA/05080075AA (qty.4) 140 272 00 25 140 272 00 25 (qty 6)
K2 - !08141AB/05080185AA/05135135AA (qty.5) 210 272 00 25 240 272 02 25 (qty 6)
K3 - 52108528AA/05102096AA (qty.5) 140 272 07 25 140 272 07 25 (qty 5)
F1 Freewheel unit (sprag)- 722 270 00 31 (up to 6 170048)
OR
722 270 02 31 (as of 6 170049) (??)
F2 Freewheel unit (sprag)- 240 270 01 31




Is is there a way to find out if the s65 parts are somehow better or worse (or partly) than upgrade parts from the 722.6 that appears in the high powered dodge cars? Many more on the road and many modified.
I only paid $5k for the car initially so I really do not see myself spending that kind of loot on any part... ever

Gonna go upgraded clutch packs on factory box rebuilt with minimum of replacement parts needed... going through the process now of tearing old box down, inspection, organization and parts order compilation... soda/media blasting casing to make the Aluminum all pretty again
S65 parts will be WORSE than the Red Eagle- Alto branded parts that SHP and Paramount sell.
To my understanding the S65 .649 parts are dual sided clutches where some of our .643 boxes are single sided; this is how they are rated for the extra brunt those motors throw down
If you have an endless budget then get a nasty 1000whp/1350wtq box built by SHP or Paramount
I do not see my car ever making 1/2 that wtq even with my 185mm crank pulley I have on their, so why would I spend $1750 on parts?
Factory parts are pretty beastly and I will never go weistec/bi-turbo so just gonna get her right as rain and back to factory/factory+ status
You can get up to those numbers with a built transmission as well but that is a lot more money. I also only use factory clutches in all of my builds.
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You can get up to those numbers with a built transmission as well but that is a lot more money. I also only use factory clutches in all of my builds.
I guess this is a good fact finding thread indeed; sorry to ***-U-ME this topic with the "I read it on the net somewhere" information.
The reading I found stated they were the same number of clutches but some were dual sided adding more bite... guess I (they) was wrong...
I just look forward to getting the factory box back to just that, factory refreshed state
The Best of Mercedes & AMG
You can get up to those numbers with a built transmission as well but that is a lot more money. I also only use factory clutches in all of my builds.
Yep, I admit I am a bit nutty
Trans drop is not too bad, it's just a burly job to get it separated and dropped. 1st time out took me forever, bc I took everything off to do it, both sides of exhaust, whole driveshaft etc. Now I know I can do it quicker due to experience and learning the best method. Seems a common theme across many projects in life, whether house, cars or writing code.
You can refresh VB with a new set of blue tops but you may have them already "if it is not broken, why fix", only replace if you have brown top solenoids. Add conductor plate + filter + fill with fluid ----> you are in "tada done state".
Dropping VB and pan you will have to fill back up with 4-5 quarts of Shell 134 ATF fluid fwiw
I used 4.5qts when I just dropped mine
Last edited by BoostedAero; May 9, 2017 at 10:23 AM.
http://www.ebay.com/itm/Sonnax-68942...5XfAR8&vxp=mtr
http://www.ebay.com/itm/Sonnax-68942...dXRo3F&vxp=mtr
Yep, I admit I am a bit nutty
Trans drop is not too bad, it's just a burly job to get it separated and dropped. 1st time out took me forever, bc I took everything off to do it, both sides of exhaust, whole driveshaft etc. Now I know I can do it quicker due to experience and learning the best method. Seems a common theme across many projects in life, whether house, cars or writing code.
You can refresh VB with a new set of blue tops but you may have them already "if it is not broken, why fix", only replace if you have brown top solenoids. Add conductor plate + filter + fill with fluid ----> you are in "tada done state".
Dropping VB and pan you will have to fill back up with 4-5 quarts of Shell 134 ATF fluid fwiw
I used 4.5qts when I just dropped mine
Do you have a lift at home? I raised my CLK on 4 ramps and it was tall enough for me to work on my valve body.
Swapping the solenoids is easy, just gonna move em over... I think I'm gonna get this valve body and put it in, it's suprisingly affordable, I thought they'd ask for like $800...
I'll send em my old valve body from my CLK for the core charge...
Swapping the solenoids is easy, just gonna move em over... I think I'm gonna get this valve body and put it in, it's suprisingly affordable, I thought they'd ask for like $800...
I'll send em my old valve body from my CLK for the core charge...
The smooth floor in my garage prevented me from being able to use the ramps I have
http://www.ebay.com/itm/Sonnax-68942...5XfAR8&vxp=mtr
http://www.ebay.com/itm/Sonnax-68942...dXRo3F&vxp=mtr
Last edited by BoostedAero; May 9, 2017 at 12:13 PM.
I would just like to say that the SHR valve body is great product. But I am biased. I make them for them. I do not recommend that valve body without the ability to tune for it. It can and is normally very harsh. I have run it on Mercedes but it is pretty rough.
I would just like to say that the SHR valve body is great product. But I am biased. I make them for them. I do not recommend that valve body without the ability to tune for it. It can and is normally very harsh. I have run it on Mercedes but it is pretty rough.
Just gonna put this right here
whipple you are a bad@$$
whipple has known about this tech for 5 or 6 years...I am an IT crackhead and this is rather appealing bc I love to tinker. This initially was developed for a different market adapting the 722.6 to the MB diesel platform
TCM-2800 is a usual path to take as an alternative to upgrading the factory TCU with a flash. This seems another alternative if one loves to tinker... I myself love all things open source and wish someone would crack the 2.8 ecu... we shall wait and see
But ooooooooo and ahhhhhhh look at that pretty screen
Nice button and learning algorithms for shift firmness too
Not for faint of heart or light of wallet ($1k ish)
Last edited by BoostedAero; May 10, 2017 at 12:22 PM.
I will probably work from the rear planet gears back down to the bell/stator/pump/b1 side
F1 appears good, covered everything up to protect it from dust until I can clear out some more time this weekend to start inspecting clutches
(I go back to Va/NC border to retrieve car and install new alternator tomorrow so fun times are ahead)
I will be taking pictures all along the way to ease re-assembly
Last edited by BoostedAero; May 10, 2017 at 11:47 AM.
Here is where I got my 5-6 year time stamp whipple ;-D
http://www.superturbodiesel.com/std/...d.php?tid=3114
-OR-
$900 to $1500 for an aftermarket trans controller and an open source device like this (http://www.ofgear.dk/) or the TCM 2800 (
Hit Whipple up if you want to go aftermarket with the 2800
To my understanding the 2800 has more R&D done on our chassis and you could have a base file worked up from someone who posted up on this forum a while ago just do some searching
Whipple was that you that was working up the TCM-2800 thread a while ago...? I got buried with work load / car projects / honey-do list :-/
I am a UNIX/Objective C guy so anything open source is very appealing to me
Last edited by BoostedAero; May 11, 2017 at 09:02 AM.
I am happy to contribute, I really like hearing about other people's crappy car problems and fixing my issues before they happen
I guess it was my turn to contribute to the pack lol
None of this is open source though. You have tuning software to adjust tuning parameters but you cannot change the firmware. You can look at the products at PCS website.
I made a little progress:
Taking pictures close up of the stacking of bearings/races/seals etc for reassembly
I am also referencing this document for a little more accurate identification / assembly
So upon disassembly I have found one item of concern so far... perhaps it is not even an issue or maybe it is...?
The front planet gearing + K2 clutch drum + input shaft assembly is currently locked onto the K3 clutch drum + rear Planet + output shaft portion
This is the only failure/oddity I have found so far, Sprags lock clockwise and do not slip, clutches inspected so far look similar to below, well grooved and do not smell burned at all.
Initially the transmission had symptoms of 1 to 2nd gear shift was normal and smooth after reset. Then 2nd gear shifting to 3rd would just go into freewheel/neutral then drop back to 2nd gear and put trans in limp mode...Conductor plate, flush and VB clean out was done in an effort to resolve these symptoms prior to trans being replaced...
I thought it would be a f2 sprag failure from those symptoms but with this discovery perhaps this was the issue....
Investigation continues
Last edited by BoostedAero; May 11, 2017 at 10:56 AM.
722.6 120 page ATSG manual (.pdf) (7,940KB)
Basically anything you ever wanted to know about our transmission inclusive of complete overhaul process





