OK guys I'm counting on ya coming through with some help... with this my next hurdle with this 300K 300D[na] [123 chassis] beast!

I have done my homework and read all that I found in the archives about the K-1 kits and how much you have raved about how the kit helped improve the 2-3 shift of 722.3, 722.4, and 722.5 transmissions [ M-B’s P/N = 126_270_44_77].

However becuase the P/N starts with 126, I'm thinking this might not work for my cars 123 chasis tranny... # 722_118_02_098161 that was taken off right side of the transmission.

So here are your pop quiz questions:
Q1 – Does anyone know whether M-B has a K-1 kit for this tranny… or
Q2 - whether or not the 126_270_44_77 kit will work in my 722.118 tranny… and finally
Q3 - whether there is another P/N for a kit for my car's 722.1 series tranny?

I have repeatedly struck out at multiple M-B dealers and even the forum's two sponsors! I’m beginning to think I might have to identify the individual parts in the k-1 kit and somehow correlate these to comparable parts in my 722.118… and then finally purchase these parts individually !

Sor for extra points on your pop quiz grade, here is your bonus question:

Q4 – Does anyone have the P/N(s) of the parts in the K-1 kit [ P/N…126_270_44_77 ] ?

Seriously, your help would be most appreciated and quite possibly a ton of time !

Sam // Novato, CA

P.S. - Don't forget I'm maintaining 3 of these beasties now so I'm bound to come up with something later you will benefit from too !

the part number does in fact start with W126. My kit did and it works splendidly.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

The other thing to keep in mind is that the official name of the kit, stamped on the bag label next to the part number, is
"thrust pin".

I think a lot of parts guys get confused when you ask for the "K1 spring kit" and give them the part number. What comes back is not "K1 spring kit" but "thrust pin".

Read post #7; see if it applies?

K1 spring kit adventures -- any ideas?

__________________
The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

Thanks BoneHeadDoctor - then I can assume you did your K-1 on your ’83 300D W123 sedan? Do you know what series tranny that car has… is it by chance a 722.1… or more likely a 722.3, 722.4, or 722.5? These last 3 are exactly what everyone has indicated their kit’s are for.
I’m very much interested in what the transmission #(s) are that this kit has successfully been installed in.

Thanks TechGuy512 – I just returned from speaking with a young M-B parts tech and he indicates that their parts “system” does not even allow them to search by part name… so “thrust pin” might be useful for me working off the InterNet, but zero help for the dealers! I’ll try “thrust pin” at several of the on-line parts houses.

Thanks jbaj007 – Yes, I had looked at http://www.peachparts.com/shopforu...light=K-1+part and the other links/threads it led me to... and they spoke of their success and glee but no one identified what specific series of tranny they did surgery on… and for sure no one I.D.’d one that was 722.1 series.

Unless I get more revealing posts that pin things down for me... I’m going to order the $20 K-1 kit [ Marin county price ] and dig into the belly of my 722.1 tranny… comparing each part side-by-side as I go.

Wish me luck,
Sam

I just did this on my gasser and I could swear the parts came out backwards from whats in the pictures. But I put the new parts in according to the photos and everythings great.

Note that the screws holding the cover plate on are pretty soft and distort easily unless the screwdriver blade is squarely seated in the screw head.

It's also recommended to replace the shift lever bushings while you're down there. Makes the shifter feel like new.

__________________
1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma

Quite honestly I do not know the exact transmission part number of mine, and Yes it was the W123 Sedan I did. I did it in conjunction with a fluid and filter change as I did not know when it was last changed. Not a difficult job, but it is a little time consuming. Made a big difference in the flaring.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

A WebSite known to this Forum for transmission parts
[ http://www.bulkpart.com ] has an ad that reads:
=======================
Technical manual, 722.0 / 722.1 / 722.2
Code: 58400 // Price: $16.50 - ATSG manual, Disassembly, inspection and assembly sections. Diagnosis, testing and lot of pictures
===========================
What I’m looking for is a greater understanding of the internals of this tranny so I can maybe come up with my own “K-1” kit that is also know on this Forum… the kit that has helped many resolve shifting problems on their 722.3/722.4/722.5 series trannies.

Q1 – Does ANYone have ANY experience with ANY of the series of technical manuals from this vendor?

Q2 – What does “ATSG” stand for… Automatic Transmission S??? Guide………?

ANY help will be greatly appreciated by me and the old 1980 300D !
Sam

I've got the ATSG (Automatic Transmission Service Group) manual for 722.3/722.4 and find it useful; not perfect, but useful.

__________________
The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

Thanks " jbaj007 " your comment alone makes the manual worth the price!
Sam

Thanks “ jbaj007 ” for your input… for I have ordered the “Technical manual, 722.0 / 722.1 / 722.2 ” from: http://www.bulkpart.com .

If any of you have followed the several threads on these now infamous “ K-1 kits ”, then you probably know of: http://transmission.articles.mbz.org/k1/ which is titled:
And there was also a subsequent post that included the 7 photos that were/are missing from the article… and also included 8 short steps for installing this kit.
This post was titled
“K1 ACCUMULATOR SPRING KIT FOR 722.3-722.4-722.5… P/N 126_270_44_77 ”.

I have gleaned additional information from:
(a) http://www.bulkpart.com, and one of their sources for automatic transmission parts
(b) http://www.transmissionkits.com

Based upon what I have at this time I think I can state:

(1) The M-B K1 [ K-1] kit [ p/n 126_270_44_77 ] could probably also be described as a
“Clutch Piston Retainer Repair Kit” which is what (b) calls their similar but expanded "K-1/K-2".
(2) The full title of (b)’s kit is “K-1, K-2 Clutch Piston Retainer Repair Kit” and I have found
nothing indicating that it is sold by (a) despite their distribution of other of (b)’s products.
I also note that this K-1/K-2 kit is only for 722.3 and 722.4 series transmissions… NOT for the 722.5.
(3) The 722.3 transmission has a 6-bolt pan used on 1981-97 model M-B(s).
(4) The 722.4 transmission has a 6-bolt pan used on 1984-97 model M-B(s).
(5) The 722.0, 722.1, & 722.2 transmissions were 4-bolt pan transmissions used on 1970-83 M-B(s).
(6) Considering that the 722.5 was a newer design 5-speed tranny, there is a good chance M-B’s K-1
Kit might not work on this transmission which was on 1990-97 M-B(s).
(7) In addition to the above expanded K-1/K-2 kit for the M-B 722.3 & 722.4 trannies,
“Precision International” [ (b) above] markets a number of products for M-B transmissions, some of
these through (a). For example they have 3-levels of kits for the 722.0 through 722.4 that range in
cost from $105 to $168 through (a)… and it looks like you can purchase directly from (b) as well
but you have to call… and supposedly (b) offers “ FREE ” technical support at their toll-free phone
line.

Having stated the above, it’s beginning to look dim that I will come up with some kind of K-1 kit for these earlier model M-B’s tranny series [ 722.0-722.1-722.2]… but I have not given up yet. I’m also pressing M-B[USA] corporate for information so keep your fingers crossed and pass along any clues you might have out there.

Sam

OK, here is my update:
I just got off the M-B [USA] Classic Parts hotline with "Tom". They have a limit of 1 subject/per call and clearly are under pressure to move on to the next CUSTOMER! So I gave "Tome" the M-B p/n we all know [ 126_270_44_77] and asked him what he could tell me about it. He stated that the only name his "system" gave him was "AMG". I then asked if he could give me the individual p/n(s) that went into the kit. He did, and here they are.

The K-1 Kit, p/n 126_270_44_77] for the 722.3 and 722.4 is made up of:
126_277_41_77
126_277_42_77
126_993_58_04
126_993_59_04
126_993_60_04

So there you have it, more clues to this puzzle... and armed with these, I'm back to the local dealer's parts counter to see what names, if any they can give me for these parts! On my last trip there they gave me 3 different parts blow-up diagrams from their reference for my 722.1 tranny... you know the diagrams that comes from the thick, old catalogs like mine [(Mod. 123) CATALOG "F"] with tons of blow-up diagrams for the entire car.

Well apparently M-B is now up to "K" [mine is "F"] in their computer-based references. My "F" catalog has 9 pages of diagrams for the 722.1 tranny and sure enough the 3 pages my dealer gave me did not include the page I think will be needed for my 722.1 K-1 sleuthing.
Wish me luck!
Sam