722.3 differences e500 vs V12 SL600 vs C36

[yao500e]

Hello 722.3 experts,

What is the difference between 722.3 between these 3 cars: E500E, V12 SL600 and C36?

Which 722.3 is the strongest and best?

I know the C36 has the 722.328. Is the e500 and SL600 same exact 722.3?

Can a 722.3 made to be more beefed up and strong to handle HP TQ power gains?

thank you for any information.

 

[gsxr]

It's sort of a moot point because the bellhousing pattern is different between all 3, and you can't use them for a different engine. The V12 box won't bolt up to a V8, etc etc.

The V8 box is rated at 400Nm, IIRC? I believe the C36 is also an 040 unit (400Nm).
The V12 / M120 is the strongest, rated at 550Nm.

There are differences between each but I don't know what they are. The V12 box has some stronger / beefed up internals.

 

[yao500e]

It's sort of a moot point because the bellhousing pattern is different between all 3, and you can't use them for a different engine. The V12 box won't bolt up to a V8, etc etc.

The V8 box is rated at 400Nm, IIRC? I believe the C36 is also an 040 unit (400Nm).
The V12 / M120 is the strongest, rated at 550Nm.

There are differences between each but I don't know what they are. The V12 box has some stronger / beefed up internals.

Thank you GSXR. I always appreciate great information and response from you!

yes the V8 engine 722.3 has different bell housing than the m104 motors.

I read a post where guy says he "beefed up" his 722.3 with SL500 V12 internals. solenoids? or some other parts? This would be great to do for 500e or C36. Just wondering what those parts are.

I am believer in the 722.3 transmission

 

[gsxr]

I think some of the rotating parts are beefier. One of the clutch drums? I forget. I've never been far inside a 722.3 box. AFIAK the parts are NLA new so you'd have to obtain a V12 transmission and tear it apart as a donor. I think the common modification is to add an extra clutch disc to the K2 clutch pack by using thinner steels, but if the parts are NLA, that won't be possible either...

 

[Alphasud40]

I bet if you were to reach out to Sun Coast Sun Valley Motors they could name the differences. Would also be a good discussion if you need to have yours rebuilt. I bet they could beef up your transmission if you needed more torque capabilities. I asked a transmission rebuilder if he would beef up a transmission for a stock application and his response was they won’t last any longer. Just keep it serviced. I thought about that and realized clutch packs don’t wear out if the transmission isn’t slipping. Slipping is caused by a lack of pressure from either hard or damaged seals or mechanical wear from bushings creating larger tolerances. That will happen regardless of the number of extra elements in the clutch packs.

 

[yao500e]

Just found out the V12 SL600 tranmission model is:

722.362​

Good info on this SL600 722.362 here: Transmission 722.362 SL600 Questions

I truly wonder what is in this xxx.362 that makes it strong and better than the E500 and C36 versions.

thank you.

 

[yao500e]

I bet if you were to reach out to Sun Coast Motors they could name the differences. Would also be a good discussion if you need to have yours rebuilt. I bet they could beef up your transmission if you needed more torque capabilities. I asked a transmission rebuilder if he would beef up a transmission for a stock application and his response was they won’t last any longer. Just keep it serviced. I thought about that and realized clutch packs don’t wear out if the transmission isn’t slipping. Slipping is caused by a lack of pressure from either hard or damaged seals or mechanical wear from bushings creating larger tolerances. That will happen regardless of the number of extra elements in the clutch packs.

thank you. ill give suncoast a call.

 

[dionphaneuf]

Sun Coast or Sun Valley?

 

[Alphasud40]

Sorry Sun Valley Transmission

Sun Valley Mercedes Transmissions

Rebuilt Mercedes Benz Transmissions

www.mercedesdismantlers.com

 

[gsxr]

C36 = 722.328 W4A-040
500E = 722.365 or 722.370, W4A-040 (.365/.370 was also used in 1992-95 500SEL/S500)
M120 = 722.362, W4A-055

Someone on the BW thread stated the V12 transmission (.362) was also used on the SL500, which is completely wrong.

 

[195910]

C36 = 722.328 W4A-040
500E = 722.365 or 722.370, W4A-040 (.365/.370 was also used in 1992-95 500SEL/S500)
M120 = 722.362, W4A-055

Someone on the BW thread stated the V12 transmission (.362) was also used on the SL500, which is completely wrong.

As always we thank @gsxr for this valuable information.
Do we know how the W4A-055 is reinforced compared to the 040? More clutches or is it a pressure/modulation difference?

 

[gsxr]

Do we know how the W4A-055 is reinforced compared to the 040? More clutches or is it a pressure/modulation difference?

All I remember is that there are some internal components which are different / strengthened on the V12 / W4A-055, but I don't recall which items specifically.

I bet @jhodg5ck knows...

 

[yao500e]

All I remember is that there are some internal components which are different / strengthened on the V12 / W4A-055, but I don't recall which items specifically.

I bet @jhodg5ck knows...

It seems the C36 has the 722.3 as C280! I wonder if the SL600 722.362 valve body and clutch plate can be used in the C36 722.3 transmission.

 

[Duh_Vinci]

I think the common modification is to add an extra clutch disc to the K2 clutch pack by using thinner steels, but if the parts are NLA, that won't be possible either...

or possibly use beefier Kevlar clutches ( @jhodg5ck use to have) and match with thinner steels, Cobra Transmissions still appear to have widest selection of individual parts Automatic Transmission Parts - Mercedes Benz - Search by Transmission Model - 722-5 - 722-5 Transmission Kits - Page 1 - Cobra Transmission

 

[yao500e]

or possibly use beefier Kevlar clutches ( @jhodg5ck use to have) and match with thinner steels, Cobra Transmissions still appear to have widest selection of individual parts Automatic Transmission Parts - Mercedes Benz - Search by Transmission Model - 722-5 - 722-5 Transmission Kits - Page 1 - Cobra Transmission

Is an OEM 722.3xx rebuild kit the best parts to get? or are after market parts just as good. thank you.

 

[Duh_Vinci]

Is an OEM 722.3xx rebuild kit the best parts to get? or are after market parts just as good. thank you.

I think it's pretty safe to say, as much effort it takes to get one out and rebuild one, it's certainly is recommended to use the best possible parts "available" (as @gsxr mentioned, many parts are NLA). That said, I personally used a combination of parts, factory and aftermarket...

My "Banner" kit from Precision International, that was actually recommended by one of the local specialists and another MB enthusiast had a NOS kit that he ended not using...

My steels for K1 and K2 were toast as well, so those I ordered separately, particularly because I needed "custom" thickness" steels to match what I had for proper clearances, back then, from WIT transmission, my steels were made by Alto, and those are exceptional quality and 1/3 priced from the factory MB.

B1 and B2 bands I opted for original MB, sourced those as NOS for a fraction of the dealer price. B1 and B2 piston Teflon rings and seals I've used from MB, those are PITA to get and cheap from the dealer, so as the front pump gasket I opted for one from the dealer, also cheap.

BTW, just looked up the rebuild date on the file - Oct 2018! 5 years still holding strong (and I do drive the car pretty hard, it's fun with FGS Valve Body)

Regards,
D

 

[ccrelan]

It seems the C36 has the 722.3 as C280! I wonder if the SL600 722.362 valve body and clutch plate can be used in the C36 722.3 transmission.

the C280 used a 722.4

 

[Mercedes>BMW]

Are you planning to put in a beefed up trans in your 500e? Is it pushing more power somehow?