Max.H

http://www.ebay.com/itm/MERCEDES-722...ZVpAEb&vxp=mtr


The 722.6 trans has been used in many different Mercedes and Chrysler cars.

Would this be the right rebuilt kit for an E55 trans? I thought the clutches would be different then say an E500?

Anyone know where to source a transmission rebuild kit that can be given to trans shop to do the labor?

Just to start thinking about options when the time comes. If I should rebuild my trans or to buy a decent used trans. Good to know your options ahead of time, I'm sure others are in the same boat or will be as these cars continue to age.

TheTherapist

Interesting. I would want to hear from someone who's tried it though - definitely wouldn't want to be the guinea pig!

SICAMG

I am a transmission rebuilder by trade and I can tell you its a very easy transmission to do. Really easy if it hasnt blown up so you just do a freshen up on it.

Max.H

Right, new clutches and o rings conductor plate pin filter and that about covers it all. Taking into consideration that your trans has not imploded.

Hard to do because of the torque limiter in the tcu and such.

So, nobody has been able to quote a price on how much it costs? Or if the kit I shared would be the right kit for E55?

Do you know if the clutches are different? What about the SRT8 that uses same trans? Is it the same?

stockC43

Amg trans is stronger than a srt. Chrysler used lower cost parts. (It's still a Chrysler, not a Mercedes)You can also use .9 clutches to "upgrade" the trans. Mb parts are realitivly cheap and proven. Last I checked you can get a seal kit but other than that, most parts come individually. I would stay away from eBay parts. And yes, the .6 is stupid easy to rebuild. No bands to worry about, or separating a valve body etc. if you want to "learn" how they come apart, just about every .6 is assembled the same way. Find the cheapest junk trans and play around with it. It should take less than 30min to completely disassemble a .6.

Max.H

Great info. Ya I've looked at the inside from some videos and the valve body just drops right down with conductor plate. Then, I'm assuming there is some cover to access the clutch discs and replace all the various o rings.

Good to know, I thought there was some complicated way to shim the transmission or something. But, you are saying no. It's just a simple tear down, clean, inspect and reassemble with new clutches and o rings?

So ebay is a no go for the clutches and rebuild kit. Even the original mercedes parts? This will be for future reference and to help others who may need to do this sooner or later.

Elhonaz

I've been thinking that since i have over 100k miles also, a tranny rebuilt would be in place.. surely would not hurt it. Nice to see how this goes forward.

Elhonaz

i remembered this thread by pearlpower.. great pics and info!

I was sure i remembered he said to use oem parts on this as they are very stong and reliable!

https://mbworld.org/forums/w211-amg/...uild-pics.html

whipplem104

So I agree do not use cheapo clutches and seals. I build these for high performance all the time. The factory clutches, either mercedes or chrylser are very good. I cannot see any difference in the parts. I use mercedes because that is who I have accnts with and the price difference is not enough for me to buy chrysler stuff.
As far as strength goes I would not say that one is better. I have run 1000ck/hp through a stock chrysler trans and would do the same through a mercedes.
To be honest you should check a remanufactured trans from the dealer for price. They are pretty reasonable most of the time.

Rocman8

no there is not a cover to access the clutches and o rings. the transmission needs removed and the transmission housing removed and everything lifted off of the shafts and disassembled. and you will need a press to be able to replace all the o rings.

carguyshu

if you're going to rebuild, why not upgrade to the sl65 spec parts? i'd imagine they aren't that much more, but could be wrong

Max.H

thanks for chiming in guys. All sounds solid and reputable.

The SL65 trans is the 722.9? Using those clutches sounds like a good idea.

Shardul sells a complete kit that looks reasonable and he's always taken care of me and my friends who buy from him. So, it's about 2000 for parts and labor to rebuild the trans? Does that sound about right? Versus 1000 for a used working trans.

I may tackle the labor myself and save a few bucks down the road when I need this. Could be a fun project.

So, to be clear there is no special shims or anything that would require extensive measuring like building a bottom end. Its just disassemble and reassemble, torque to spec. Thats it?

Rocman8

the sl65 trans was a 722.6 until the r231 chassis which is now 722.9
its not just that easy. every clutch pack needs the be measured and possibly adjusted with different size snap rings.

Max.H

I thought the new SL65 uses 7 speed now? What is the difference in the 722.6 and 722.9?

So, 722.6 trans in older S65 was identical to the E55? Clutches and all? Probably just TCU difference with different torque limiters? Interesting stuff to learn about these cars.

Rocman8

the new sl65 does use 7 speed (722.9) the older ones used our 5 speed (722.6) it is not exactly the same as ours. it is built to handle more torque. there are too many parts to swap out in our trans to make it identical to the 65 trans than its worth. its not just different clutches it has different hard parts as well.

Max.H

Of course, and not to mention gearing has to be different for different power band and rev range of the motor.

There is a local guy to me who builds 300C SRT8 trans. I think they are 722.6. Worst case I don't feel like wrenching I can have him do the labor and supply him with the parts.

Colin Frolick

this book was very helpful, like others said it's an easy rebuild


i bought a kit from auto matic kings in Riverside, also added extra plates in a few of the clutches. they also rebuilt my converter. i'm sure there's a shop in SD that can hook you up. the different size snap rings i ordered from mopar.com

i broke down and bought the tool for compressing the clutch pistons, makes changing the o rings a snap.

Mike450

Clutch material and VB is the only difference between the E55 and srt8 Nag1. Until you get to ~800whp/Tq, you won't have to concern yourself with bending or breaking anything mechanical in a Nag1.

Look up BFNY in Ohio. He builds Nag 1's to handle 1000hp for srt's and the Sprinters.

Southern Hot Rod and Paramount also sell rebuild kits and assembled units for 1000hp.

blackbenzz

I got mine built by southern hotrod many years ago and it's held up well so far. Knock on wood. It was way more than 2k though

Max.H

Nice, this is good to know, Because some of us may want to rebuild the trans ourselves while others opt to use reputable places like ahmad mentioned.

Mike450

$4k and core for SHR 1000HP War Viking today. Could probably talk him into shipping a converter and flex plate for that number also.

Been running one for 20k+ miles in the srt myself.

I'd give BFNY a shot first these days though.