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  #16  
Old 04-23-2006, 02:20 PM
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Update on my 722.1 K-1 hunt

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:
The K1 Kit Page 2/3 Upshift Flare Repair
This is a fix for transmission slip/flare on 2-3 upshift
at partial load for 722.3,722.4 and 722.5 automatic transmission
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

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  #17  
Old 04-24-2006, 12:01 PM
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Update #2 on K-1 kit for 722.1 Trannies !

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
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  #18  
Old 04-29-2006, 11:40 AM
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Update #3 on hunt for a K-1 Kit for 722.1 / 722.2 transmissions

A brief recap is in order. The “ K-1 Kit ” [ p/n 126_270_44_77 ] is well know on this forum and is an official M-B kit of 3 springs and 2 plastic rods onto which the springs mount inside a plastic piston [not in the kit ]. There are excellent pictures in the archives showing how to remove the old and install these new parts. As best I can tell, this kit is for the 6-bolt pan 722.3 and 722.4 series transmissions that I believe were installed in 1981-97 model M-B(s). The kit is officially M-B called “ Druckstift ” which literally translates to “ pressure pin ”. On the kit packaging it is labeled in English as “ Thrust Pin… Unit ”. On this forum it is said that this kit is primarily to correct 2-to-3 shift problems only.

Update #3 Results on my sleuthing

(1) From M-B Sources - I have been trying to find a K-1 kit equivalent for the earlier 722.1 / 722.2 transmissions… more specifically the 722.118 in my Son’s 1980 300D[na] M-B. I purchased the 126_270_44_77 kit to have as a reference [and as future parts for my in-law’s 85 300SD]… and M-B USA corporate in N.J. identified the p/n(s) for the 5 parts in the kit. These p/n(s) are of little use as my local M-B parts counter canNOT reference the p/n(s) on their official M-B parts computer system! I’m continuing to try with my dealer’s to identify these same/equivalent parts in the 722.1 / 722.2 series trannies. I have repeatedly been stymied by M-B USA corporate when I ask for this information from their “Classic Parts” department!??

(2) Other Sources - I have purchased the “ATSG; Mercedes 722.1 / 722.2 TechTran Manual ”. For me, the best thing about having this manual are the numerous diagrams… and from these diagrams and what little I have gleaned from M-B, I would say that clearly the K-1 kit installs in what we have come to know as the “Valve Body” that is readily accessible after the pan and filter are removed. From the ATSG manual I have learned that valve body is also more descriptively known as the “Shift Valve Housing”. From this same manual’s diagrams, my best estimate is that the 3 springs in the 126_270_44_77 kit are comparable to the 722.1 / 722.2 transmission springs that are descriptively called:
(1) Weak Spring Pressure Absorber B1 / K1 / K2 ,
(2) Strong Spring Pressure Absorber B1 / K1 / K2 , and
(3) Piston Spring Pressure Absorber B1 / K1 / K2 .
I found NO comparable parts for the two plastic “thingies” in the K-1 kit that the springs are mount on in the 722.3 / 722.4 tranies.

At TransmissionKits.Com there is a parts listing in Precision International’s [PI] aftermarket catalog where I found a much more descriptive name for what this K-1 kit might/should be called… “ Clutch Piston Retainer Repair Kit ” and PI has separate kits for the 722.3 and 722.4 trannies that address both K-1 and K-2.

Finally at BulkPart.Com I have found a K-1/K-2 springs only kits [“ Valve Body Kits ”] for the 722.3 / 722.4 transmissions and what’s interesting here is that there are separate kits… one for gas fueled engines and one for diesel!

That’s where I’m at for now. Hopefully soon someone at M-B will come through for me and identify the 3 springs in the 722.118 tranny that are equivalent to the 3 springs in the M-B kit for the 722.3 / 722.4.

Let me point out that it was this forum and your posts that gave me the initial clues… M-B has given up very little information and this somewhat grudgingly [I'll bet that's no surprise to many of you!] …
so thank you for the clues,
My final goal now is to purchase the M-B parts [springs + ??] and give them a try in my 722.118... and to report back to you whenever that happens later
I hope to close out THIS THREAD soooooon !
Sam
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  #19  
Old 04-30-2006, 11:00 PM
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Update #4... to report an outstanding WebSite for Tranny Info !

Update #4… I have found a great WebSite for vintage M-B tranny information [ vacuum diagrams and parts diagrams]. I knew about this previously but didn’t think to bring it to your attention. This is a regional/local transmission rebuilder who also has a retail shop just down the street from their rebuilding operation in Redwood City, CA. They are also a “ Factory Authorized ‘ ZF ’ Distributor ” for trannies/parts imported from Europe. "ZF" is apparently a major German rebuilder for high-end European autos.

Their WebSite’s Home Page is at http://www.peterschmid.com/ … and when you go there be sure to take a look in the left margin where there are links for the following :
(1) Parts Diagrams [ blowups ],
(2) Application Guide [ for knowing what trannies were in what models ],
(3) Vacuum Schematics [ outstanding… broken down into several year/model categories ],
(4) Tech Tips [ cable control adjustments for 103, 104, 119, 119.79, 120, and 603 engines ]
(5) Vacuum Control Valve tests [ 7 pages for 123 & 126 model trannies from a M-B manual ]

The best engine/tranny vacuum diagram I have found for my 1980 300D [California edition] M-B came from (3) above on this WebSite.

Still pushing M-B [Corp & Local] for answers… but progress is slooooowwwww!
Sam
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  #20  
Old 05-03-2006, 12:13 PM
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Update #5 - Search for a K-1 Kit for 722.0/722.1/722.3 trannies…

Well it looks like I have run into a stone wall with M-B!
Unless one is prepared to purchase either:
(1) a major transmission rebuild kit, or
(2) a complete new “valve body” [aka “shift housing”]
it does not appear that M-B is much help to me in my quest to try to come up with my own low cost K-1 kit for these earlier trannies.
Yes, I know some of you are saying that “I told you so” !

So this leaves me one final gasp to save my K-1 kit idea and this is based upon a suggestion by “C32AMG” who must have nightmares about these auto trannies or maybe he just worked most of his adult life in or owned a transmission shop and worked on a lot of these early trannies.

In any event, as soon as I finish working on another family car and make room in the garage, I will be dropping the pan on the 1980 300D’s tranny and remove the 3 springs and piston that make up what I now believe are collectively referred to as the “Accumulator ” section of the tranny’s
“Upper Body ”. This is reachable just by dropping the pan.

Once I have removed the 3 springs and piston, I will side-by-side compare them to those in M-B’s K-1 kit for the 722.3/722.4 trannies.
At that point I will have to decide on whether to install one or more of these updated springs in the 722.118 tranny! So I will put it back together, fire her up and take it for a ride
!

Of course I will report back to all of you who wait with "baited breath" or maybe more likely by now wishing I’d put this dead horse out of its pain!
Regards,
Sam
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  #21  
Old 05-05-2006, 02:47 AM
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This is to end my posts on this thread in the Diesel Forum...

but see THREAD http://www.peachparts.com/shopforum/showthread.php?t=151358 in the " Tech Help " forum to see how this story concludes by some time next week !
Regards,
Sam

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