722.303 in bits photo shoot - Page 8 - PeachParts Mercedes-Benz Forum

compu_85 · #**106** 11-25-2013, 09:09 PM

I drained out the fluid I could through the plug, got about 88oz worth. I put it into clear glass containers, and didn't see any contaminates in the fluid at all. Pushed the car off the ramps, checked the dipstick, none showed. Started the car, there was no engagement in D or R. Kept adding fluid until I had put it all back in, which put the level at the bottom line. Same problem... no movement in R and an odd sound in D.

Of course as the car was idling the serp tensioner shock overheated and barfed all of its oil out.

That made a nice stinky smoke cloud. At least it didn't catch fire.

I'm getting closer and closer to parting the car out. It seems like any time I fix one thing 2 other things break

The car is on jackstands for now, fluid draining. I'll tear into the valve body again tomorrow.

Thanks,

-J

Stretch · #**107** 11-26-2013, 02:06 AM

I think you are better off putting some oil in it before you start the engine.

compu_85 · #**108** 11-26-2013, 09:54 PM

So some progress tonight! Pulled the valve body and put the spring back in. I also found an error I made when I installed the kit: I put the springs on the wrong side of #52! My trans originally had springs on both sides of #52, I got confused and put the single replacement spring on the "inside" of the piston, not the "outside" facing the retaining plate.

I don't have enough trans fluid to get the level correct... just enough to get to the loop on the bottom of the dipstick. I'll get more fluid tomorrow and report back.

-J

Stretch · #**109** 11-27-2013, 03:14 AM

Oh one thing I forgot to mention - and it is really late to say it now (sorry) - but the gasket on to which the valve body fits could probably do with a change. Apparently these leak and cause all sorts of trouble. Something to consider if try #XXX doesn't work.

compu_85 · #**110** 11-27-2013, 09:45 AM

I asked a friend on TDIClub who used to rebuild 722.3's professionally if he had any documentation on the valve bodies. This was his response:

Quote:

Originally Posted by CoolAirVw

sorry I got nothing.
I'm very familier with 722.3 as we used to rebuild for Hafkenmeyer motors who is a BMW/Mercedes speciality shop but there are hundreds of minor differences and most documentation just covers one "code", and says "others may differ. Pay attention as you take it apart".

good luck with that.

You'll also note that these 2 diagrams show the # 52 piston facing the opposite direction:

The first diagram matches what Stretch found in his trans. Neither matches mine!

-J

Stretch · #**111** 11-27-2013, 10:04 AM

Oh for f$#%$^k's sake - do you want my valve body? In the next few weeks I can probably find time to put it back together again for you and post it if you really need it. Postage will probably be about 40 euros by surface mail though and will take for...

...ev...

...errrrrrrrrr...

...if you wanted it quicker you'd probably be able to find one nearer to you for the cost of a UPS type shipping service.

As mine is in bits I could measure the lengths of the valves and the springs to see if we can make any sense of it all. I think may be that will be the better option. A bit of long distance team work and head scratching could make it good. (Whilst you look for another valve body - just in case! Who was it with a transmission going begging down the side of his house recently?)

compu_85 · #**112** 11-27-2013, 11:53 AM

If it ends up not working once I get fluid it in I'll just replace the whole trans with the one the member in Ohio is selling

Just a few hours of work left then I get to find out!

I don't think your valve body would work for my trans anyway, but I appreciate the offer! Perhaps some of the difference is how your trans rests in 2nd but shifts to 1st as soon as you touch the throttle, whereas mine rests in 1st?

_J

Stretch · #**113** 11-27-2013, 01:57 PM

Quote:

Originally Posted by compu_85

If it ends up not working once I get fluid it in I'll just replace the whole trans with the one the member in Ohio is selling

Just a few hours of work left then I get to find out!

I don't think your valve body would work for my trans anyway, but I appreciate the offer! Perhaps some of the difference is how your trans rests in 2nd but shifts to 1st as soon as you touch the throttle, whereas mine rests in 1st?

_J

I haven't a clue about that functionality. I've read the generic "this is how it is meant to work" information in chapter 27 but it doesn't go into specific type details describing variations on the theme. Transmissions aren't a black art - it is just the documentation isn't that great or widely available.

compu_85 · #**114** 11-27-2013, 02:38 PM

Great success! Moves off in first gear, gets all the forward gears and reverse

Stretch · #**115** 11-27-2013, 02:49 PM

Good egg!

compu_85 · #**116** 12-01-2013, 08:01 PM

Quote:

Originally Posted by Stretch

Good egg!

The good news continues... no more 1-2 flare. All the shifts are the same firmness now. Waiting on a replacement modulator cap from the dealer since the aftermarket one I installed over the summer is already dry rotted and cracked

It really is a shame the documentation for these is so hard to get. The FSM for my 1992 Dodge Ram had a huge section on the transmission complete with testing, hydraulic circuit flow diagrams, and rebuild instructions.

-J

Stretch · #**117** 12-03-2013, 04:01 AM

The documentation does kind of exist. It isn't really type specific but chapter 27 was translated into English and it is available to buy on WIS. The problem with the 722.3 is that within the grouping 722.3 there are type and time related changes. Things got more and more plasticy as time went on and there was a kind of cross over in potentially "poorer quality" from the 722.3 to the 722.4. Furthermore the 722.4 information is bundled into the documentation as well. For broad strokes of information this isn't too much trouble - but when you need to know the inner secrets of the valve body you're going to struggle a bit.

I have plans this winter - when the weather is crap and I can't get out - to write up a summary of the chapter 27 information that I have. There is loads and loads of information to go through as I have both the German and English versions of the text. Please note; whilst I have plans, this doesn't necessarily mean I'll do it just yet!

compu_85 · #**118** 12-03-2013, 09:11 AM

Well if there is any way I can help let me know!

-J

Stretch · #**119** 12-03-2013, 02:04 PM

OK - will do. When the fit has stopped hitting the shan over here I'll look through all the documentation I have and try to figure out what needs to be done.

Zulfiqar · #**120** 12-03-2013, 03:02 PM

a bit off question,

that fluid is pink in color, I used a Brad Penn III-H ATF in my 722.4 transmission and it has performed far better than any other fluid I used.

this Brad Penn ATF is pink and smells a bit like candy (no I did not taste it) and makes the shifts really nice. The usual ATFs I see are dark red like yours in the pan and smell like fish. Is this Mobil Delvac ATF sweet smelling too? The one trans shop that I know says that sweet smelling atf is usually mercon V