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  #1  
Old 07-26-2010, 01:41 AM
general nuisance
 
Join Date: Dec 2009
Location: des moines, ia
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Need part #'s for some 722.3 trans parts

I found this document that suggests one should try replacing a couple transmission valve body parts if there's a reverse problem. Before I pull and embark on a complete overhaul I'd like to try and replace these items.

Here's the doc:
http://www.europeantransmissions.com/Bulletin/DTC.merc/97-20.pdf

I need part numbers for the following:

accumulator switching on control valve & spring
accumulator switching on piston

I've checked EPC but cannot locate a complete breakdown of the valve body that shows these items and assigns part numbers, if anyone has diagram and part numbers for these I would appreciate it.

Thanks
Steve A

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92 W140 OM603
97 VW Jetta TDI
90 Passat variant TDI 6 speed MT
94 Chevy K1500 6.5TD
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  #2  
Old 07-26-2010, 03:26 AM
1984 300SD
 
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Try jaggi@jie.com
They helped me a lot. made a phone call beak to help me out.
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  #3  
Old 07-26-2010, 08:23 AM
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Quote:
Originally Posted by glenlloyd View Post
I found this document that suggests one should try replacing a couple transmission valve body parts if there's a reverse problem.
Could you elaborate on the precise nature of your "reverse" problem?
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  #4  
Old 07-26-2010, 12:17 PM
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Quote:
Originally Posted by tangofox007 View Post
Could you elaborate on the precise nature of your "reverse" problem?
no reverse
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92 W140 OM603
97 VW Jetta TDI
90 Passat variant TDI 6 speed MT
94 Chevy K1500 6.5TD
05 E320 CDI
+ others
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  #5  
Old 07-26-2010, 12:19 PM
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Quote:
Originally Posted by glenlloyd View Post
no reverse
Was that a sudden occurrence?
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  #6  
Old 07-26-2010, 12:35 PM
general nuisance
 
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Quote:
Originally Posted by tangofox007 View Post
Was that a sudden occurrence?
The car has been very slow to engage reverse since I bought it, sometimes taking a couple minutes if it's warm. When cold it would take about 5-10 seconds to engage. When it did engage there was no slipping.

Now however reverse rarely engages, but before I go the route of having the unit overhauled I thought I would look at and try replacing these items in the valve body.

The 'no reverse' problem has been written about extensively on the forum, and I suspect that my situation is likely no different from anyone elses, but before I embark on that expensive path I'm going to try this route.

Thanks
Steve A
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92 W140 OM603
97 VW Jetta TDI
90 Passat variant TDI 6 speed MT
94 Chevy K1500 6.5TD
05 E320 CDI
+ others
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  #7  
Old 07-26-2010, 02:26 PM
sixto's Avatar
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If the car is out of commission anyway, drop the valve body to check the questionable springs and plungers before you buy parts. That way you can visually confirm replacements from the dealer or wherever you shop. You can also confirm that there aren't chunks of internals and layers of clutch lining sediment in the sump.

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87 300D
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  #8  
Old 07-26-2010, 11:59 PM
general nuisance
 
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Quote:
Originally Posted by sixto View Post
If the car is out of commission anyway, drop the valve body to check the questionable springs and plungers before you buy parts. That way you can visually confirm replacements from the dealer or wherever you shop. You can also confirm that there aren't chunks of internals and layers of clutch lining sediment in the sump.

Sixto
87 300D
Well the car isn't totally out of commission, but it could be and it won't hurt anything I guess. The trans was serviced back in Dec of '09 by Firestone, before I bought it. They backflushed the system and didn't replace the filter which I consider to be a no no with these transmissions.

When I pulled and replaced the filter and gasket in February there wasn't any sediment in the pan, but I wouldn't have expected it with the recent service, but the filter did need to be replaced.

Since then the 3-4 flare has vanished but the reverse issue has been persistent, and finally just a couple weeks ago reverse was totally gone.

I have a replacement vacuum control valve coming which should solve the forward gear shifting issues so I'll probably wait until that's installed and checked before I dig into the transmission valve body. Once I get that and replace my non-working valve I'll dig into the valve body components.

I actually think that you can pull and check these components without pulling the valve body, you can do a K1 replacement without doing it and the accumulator items are at the same level as the K1 IIRC.

Steve A
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94 Chevy K1500 6.5TD
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  #9  
Old 07-27-2010, 09:13 AM
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Quote:
Originally Posted by glenlloyd View Post

I actually think that you can pull and check these components without pulling the valve body, you can do a K1 replacement without doing it and the accumulator items are at the same level as the K1 IIRC.
You will have to split the valve body to remove the control valve and spring.
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  #10  
Old 07-27-2010, 09:14 AM
Admiral-Third World Fleet
 
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You are sure it's a 722.3 and not a 722.1, right? The .1 has a reverse band adjustment, not that I really think that's the problem in this case...

Call jaggi- they can help you
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  #11  
Old 07-27-2010, 10:49 AM
rrgrassi's Avatar
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On which car? I do not think the '92 in your sig has the 722.3 tranny.
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  #12  
Old 07-27-2010, 12:26 PM
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Quote:
Originally Posted by glenlloyd View Post
They backflushed the system
That's all I need to know, rebuild time.
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  #13  
Old 07-27-2010, 01:18 PM
general nuisance
 
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Quote:
Originally Posted by babymog View Post
That's all I need to know, rebuild time.
I tend to agree, not the method I approve of for fluid changes.

Quote:
Originally Posted by rrgrassi
On which car? I do not think the '92 in your sig has the 722.3 tranny.
All 92-95 W140 with OM603.971 have 722.367 transmission.

Quote:
Originally Posted by tangofox007
You will have to split the valve body to remove the control valve and spring.
Thanks for the info, was hoping this wasn't the case but I guess it is. Not what I wanted to hear but I'll live with it.

Steve A
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92 W140 OM603
97 VW Jetta TDI
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94 Chevy K1500 6.5TD
05 E320 CDI
+ others
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  #14  
Old 07-27-2010, 04:18 PM
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What about a longer "dogbone" on the reverse band? Anyone tried this?

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