I have the car up in the air doing an ATF Service this was in the bottom of the tranny pan. Does anyone know where it goes. It's a 722,435 03 box from a 94 300D


Thanks
Adrian

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Damn, that does not look like the kind of thing that just falls out when you open the filter pan. I don't know what that is, but interested to hear the answer.

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-justin

1987 300TD, 1987 300TD
2008 R32, 2000 Passat Wagon

No idea. Try posting it in Tech forum also.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Cheers I'll try the tech forum

It looks to me like a dogbone from a servo or something. Like when you replace a B2 piston or similar. Is the unit working OK? Maybe someone did an external repair and it fell in anf they never retreived it.

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1984 300D, 246k, veggie, sold
1982 300SD 301k

just a thought.

Thats the rod for the B3 piston. Is the trans shifting funny at all??? Its not something you can easily pop back in....

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

It flares on upchange between 2 and 3 but not too bad and not all the time

Its not magnetic

If that was the b3 rod wouldn't there be no reverse gear (or reverse all the time)?

It's most definitely one of the thrust pins from either side of one of the bx pistons and not a good sign.

__________________
1982 300TD 210K miles ("The Replacement" aka "The Anvil") - SOLD
1979 300SD 245K miles (never ending project)
2007 Pinarello F3:13
1995 Ducati 916 (SOLD, sniff)
1999 Ducati 900SSie (SOLD)

oh yeah...If you remove the valve body you should be able to get at the b2 retainer cage (a piece of orange plastic) and various other bits. You should be able to see at the very least the b2/k2 assembly and spot out if anything is missing. you can also remove the b2 piston at the same time to see what's going on.

To do this you'll have to remove the valve body and intermediate plate along with the gasket. If this is beyond your DIY skills you might want to get it to a specialist.

If you feel it is and you do not have the manuals, PM me, I have 2. 1 from the russian site (don't have link off hand) and another manual of other origins.

__________________
1982 300TD 210K miles ("The Replacement" aka "The Anvil") - SOLD
1979 300SD 245K miles (never ending project)
2007 Pinarello F3:13
1995 Ducati 916 (SOLD, sniff)
1999 Ducati 900SSie (SOLD)

Thanks guys
I have PM'd you Bob - thanks


When I (we) get it sorted I will post the results
Cheers
Adrian

Hi Bob
As I am away next week my pal will have the pleasure of sorting this one out although I would love to have a look myself. We have left the sump empty as we don't get the parts till Tuesday. So any pointers I get I will print them off and pop them in his mailbox.
Anyway
I suspect that someone was in there before. To start with there was a bolt/screw missing from the ATF sump pan. What really flags this one up is, in the spec, for the part of the b2 gizzmo in question, the small retaining nut (no.25) should under no circumstances be used twice. Judging by other things that I have found on the car, I bet it was!!
It was overfilled by about 2" on the dip stick which even I know is a hell of a lot.
It did seem strange that the pin is very discoloured not at all consistant with the rest of the tranny, which suggests it has been in the pan for quite a while.
What really baffles me though is how can it run so well without this pin, as I have said it only flares now and again ie. changing up on high revs. On a long gradual ascent with constant gas at approx one third it's fine. It will change down and up again when needed without any prompting.
Here's hoping

Thanks
Adrian

Hi
Thought I would post an update
Got all the bits, took off the valve body. As we thought someone was in there before. The small plastic retaining nut/guide piece was missing which obviously led to the small push pin falling out. It wasn't in the pan with the push pin so unless the tranny chewed it up and spit it out of the exhaust, it was not replaced by the muppet who was in there before me. After the ATF service it runs a lot tighter. Everything feels the way I think it should apart from a full gas flare (only slight and only on full gas) between 2-3. I spoke to a transmission guy on the phone and he said to bring it down and they will set it up for about £50. He suspects it needs some fine tuning. Can this be done without gauges through trial and error using that adjusting thing on the side of the tranny?? . ..I beleive that will only rectify hard shifts and not flares (??) is that true.
Anyway thanks again for the help, especially Bob
Cheers
Adrian

How did you get the pin back in place? I've just found mine on top of the oil filter while investigating why I've got no forward gears.
Any advice on how you fixed yours would be very much apreciated.

I have the same problem as roadhog. I lost 1st gear at a stop light. I was just down the street from my house and made it back ok. It shifted ok once I was rolling, the 2,3,4 shift. Reverse works fine. After removing the trans pan to do a filter and fluid change, I found what I thought was the B2 thrust rod on top of the filter. I had changed the filter about 3K ago and it wasn't there then. I pulled the B2 piston and found the dogbone was in place! After more search I ran across the picture from iamamanc and that is the piece I found. The B2 piston appears to have the plastic bushing in the trans body. Piston #201 277 0138 D+S . There is a very small 92 stamped in a circle (I assume a manufacture date). This is on a 93 300D 2.5L. When I removed the B2 cover plate there was no spring pressure against it. I had to dig it out, contrary to what I have read others have. I would like to know what the final outcome was from roadhog and iamamanc. If someone could explain what I need to to do that would help. Do I drop the Valve Body? The tranny is still in the car, so it is definitely possible to do a B2 piston repair in a 124 300D.

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'93 300D 200k (since Aug 04)
'82 300TD 205k (since March 04)
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