from what I read at the Mopar site,they source Benz clutches for high performance.They do different thing to valve bodies,and use a different TCM.The T.Convertor are stall at 3500 rpm or 4500 rpm. They add a extra cooler with fan,and deeper pan.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

While it looks similar I'm all but certain it's not the same as the 104. When I built my .6 I ruled out the sprinter bell housing as a match for my 104 though don't remember exactly why at the moment.

Based on the pics, the pump area is just fine. Set the gears in the BH and see where they contact, you will see that nothing contacts or happens in the gouged inner area around the stator support. Clean it up to remove any high spots and call it a cay.

The 722.6 was used behind the M104 ( inline 6 ) and 4 cyl that is a cut down inline 6. look at 97 C280 , 97 E320 , 97 SL320 , 97-99 S320

As for swapping gear sets, Chrysler used 4 different ratios and MB 2. MB had deeper gears for 4 and 6 cyl and a taller set for 8 / 12 cyl. Mix and match will cause limp mode.

Something to think about, the trans made it this car with just a pump lug failure, had it not failed the trans would still be going. Clean it up, change soft parts, frictions, torque converter and other bits, then drive.

On the pump lug issue, most pumps gears are made of powdered metal, the material is somewhat brittle and I've seen lugs come off in other brands of trans before. and, never flip over a used inner gear, the reversal of drive forces can cause the lugs to break off down the road.

My head has been here also. I had a 2-3 flaring issue but I think between fixing the F1 sprag, replacing the oil pump, new torque converter, replacing the frictions and damaged steels, perhaps some bearings, and the sonnax valve body kit, i'll probably be in pretty good shape.

I don't like the worn out hard parts as this is a heavy duty transmission but I also don't know if I need another 100k out of it.

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George Carstens

The spline wear on the frictions , steels and clutch drums is about what I saw on my 97 C280. And it went back together with the same drums but new frictions. I'm saving the frictions in case i need to build an economy trans just to get something going. Eventually, the lining can fall apart even if it isn't worn.

Be sure to check the bell housing as I said, the scoring might not extend into the working area of the pump.

Can anyone make a suggestion for sourcing a master rebuild kit? I keep reading that Mercedes frictions are the way to go but haven't found an online source with Mercedes frictions.

The Whatever It Takes master rebuild kit includes raybestos frictions.

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George Carstens

George,

Most kits have Allomatic Frictions which work, but I would settle for Machine cut oil grove versus a stamp grove friction. Mercedes and the others are machined except for Allomatic's.

You do have that AMG version too which has this "Z-Cut" on a few friction packs

http://drive.google.com/uc?export=view&id=1EICy-oz0OUUQmbBr3PvGWE1ODVRZj61uTg

Check peach parts here

Or

mbpartsworld(dealer in Atlanta).com they have a great look up

or

genuinemercedesparts(another).com they too have a great look up

All the best,

Martin

So i'm starting to gather some knowledge on rebuild kits and who offers what. I'll go ahead and make the statement that of course I am probably overdoing this and most of the rebuild kits are going to work just fine.

I first found this article:

:::MoparMax::: Late Model NAG1 Transmission Upgrade - 12/06/12

They recommend single sided frictions to help keep dissipate heat.

A company called Cobra Transmission Parts sells a heavy duty 722.6 kit. I spoke with them today and the heavy duty kit includes double sided frictions and the light duty kit includes single sided frictions.

I also am speaking with ITP Performance Transmissions. At this point i'm unsure if they sell single or double sided frictions with their rebuild kit. They did however recommend valve body modifications (assume higher clutch holding pressures). It's a $600 service that they offer.

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George Carstens