Got a new to me 722.315 and am running thru it putting in new seals, filters, gaskets, modulator, before I install it in my wagon.

I orders a k1 and k2 spring kit, k1 spring is the exact same style and part number as the one that was pulled from trans but k2 was not not. There seems to be ALOT of confusion on the correct part number and style of the k2 kit.

The k2 that was in the trans pretty much looked exactly the same as the k1 except the housing was blue and the part number was one number different. (k1 part number: 126 277 09 32)

k2 part number that WAS in trans: 126 277 10 32
If you google this part number there absolutely no hits there's no info about.
The NEW k2 part number is 126 277 84 32
and this one does bring up a lot of hits on google and past k1/k2 threads on here and seems to be the most common k2 spring used.

All these part numbers are the numbers that are stamped on the plastic housing (not the part number of the full kit)

Sooo basically I just took the risk of assuming this part was upgraded and re designed over the years so I decided to install it in the trans.

Was this a stupid idea? My thinking is that it should still work because Ive seen other 722.315's use this k2 and also its odd how there is literally NO information about the k2 that was in the trans.

Should I take the risk and bolt up the trans and try it out? Or should I just put the old k2 back in? Because the style is completely different, see pics below. Orr should I get another brand new k1 kit and put it in the k2 slot? They really look like they are exactly the same just a different color lol

Lastly please look at pics of how I set up the springs on the new k2 and help me confirm this is how its supposed to be installed. long spring with skinny spring inside facing into the valve body (away from screw on backing plate)

See old k2 is set up just like how the typical k1 is. Plus I know the new one looks a lot longer but the old one is being held compressed down by the plastic spring holder thing. Is this set up correctly?? I put long spring side into the chamber


Here are the part numbers


heres the info about the k1 kit with the new k1 spring. again my old k2 looks damn near exactly that same as the k1 pictured here except pn is 1 number different and its blue

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So you bought the k2 kit and installed it, but are worried that it looks too different from the old one? I'm struggling to understand your post. I bought the same kit (126 270 44 77) and installed it in my 722.315. Additionally, I stretched the other accumulator springs while I was in there.

Ya sorry sometimes its hard for me to write on here. A lot of run on sentences and bouncing around.

But yes im worried It looks completely different from the one that was in there.

So you put that the same one I have pictured in your trans and it works?

Do I have it set up correctly? I installed it exactly how it looks in the picture.

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Ok, just to clarify here. The two blue dirty pistons are the old ones? And both new ones are in the bags in your pictures? And this photo I have attached is the exact kit you have bought? There is more information on dieselbenz.info and starwiki.info. I also attached the spring diagrams.

No, my hands were just dirty. This is the old one and the new one. How I have the new one set up is exactly how I installed it. I did not disassemble the old one, take the plastic parts out and re fit with the new springs. I installed exactly as pictured.

Notice the differences between the two. The old one the back is capped off, the new one has a spring in the back. The new one is just two springs with no plastic "spring holder" inside.

Your schematic shoes the k2 having the plastic spring holder and a cap on the back. But by the parts I got and what I understand to be the parts you got the only way to achieve this is to disassemble whole thing and replace the springs. Was this what I was supposed to do??

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Perhaps it's the two spring train vs the three spring train? Image attached. I replaced my k1, not the k2, so I don't know the specifics. I did make a nifty 3d model of the k1 piston. (irrelevant to here).

You could talk to Sunvalley. I would pick one or the other and move on. A former boss used to say that if you don't know what's correct, the faster you pick one, the faster you can find out and make a correction.

I seem to remember that those springs could be changed with the valve body installed once I'd gone through the trouble of removing it and had learned how.

Take pics so you remember the details.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.

ya as of now I'm just rolling on forward and if it doesn't work I'll pull the pan and put the old one back in.

unless someone can confirm otherwise by tomorrow or the next day when I'm ready to throw in the new tranny.

prolly will pull the pan on my bad trans that I'm dropping atm to see what k2 setup they have

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Just wanted to update this thread with a tentative conclusion.

Got the trans that i'm replacing with this 722.3 out of my car 2 days ago. I got around to pulling the pan and checking what k2 set up was used. Part number was 126 277 84 32 and was the same set up as the new one I installed in the 722.3

To me this confirms this new k2 spring kit will work and im satisfied for now.

Also the spring set up is what I assumed it was too. The pics below explain how to set the springs up.

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I haven't been into my M-B transmissions, but have rebuilt 1960 - 2002 transmissions. Since they term the K1 and K2 as "accumulator", I wouldn't worry about the new one. As I understand, the accumulators delay the shifts so the transmission feels smoother. That wears the clutch plates. Better to shift fast and firm, but most drivers consider that the sign of a bad transmission. Companies have long sold "shift kits" which modify the transmission for faster shifting, in various stages up to hard-slamming race kits. I put one in my 1965 Chrysler and didn't notice the shifts harsh and didn't even notice a difference, but I'm not a transmission-phile. I recall that kit even had you take out some of the big springs, likely under an accumulator piston. As I recall, there were 2 springs and they had you take one out.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans