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Old 05-10-2008, 02:55 PM
Metafly's Avatar
1986 190D 2.5, 5 Speed
 
Join Date: Apr 2008
Location: So Cal
Posts: 106
Transmission Failure: How do you check B2 piston situation?

First time posting. Thank you for information received so far. C32AMG recommended this place on another site. 1994 C280 Auto 197,XXX mi. Transmission only goes in reverse. While climbing a canyon hill the car started flaring and then would not go forward in any of the three forward settings. I have sourced another 722.XXX tranny from a 1996 E320 but it has been suggested to me (by Steve) that there is one thing I can check with the tranny in the car; B2 Piston failure. Where do I find this specific info on how to do this, what to look for, and where to find the pieces to refresh this area if it is indeed the problem? Any help is appreciated. Thanks. Michael

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Old 05-10-2008, 08:57 PM
Metafly's Avatar
1986 190D 2.5, 5 Speed
 
Join Date: Apr 2008
Location: So Cal
Posts: 106
Quote:
Originally Posted by 84500SEL View Post
take the B2 piston cover off the side of the trans, and see if its broken, i see many in my 25 years. also i seen cases where the B2 banb breaks too.
you can pul the pan,but its hard to see up in there ,you got to take the valve body off to get a good look.
Thanks. I found these:
http://articles.mbz.org/transmission/b2/why/
http://articles.mbz.org/transmission/b2/repair/ When you say pull off the pan, are you referring to the B2 Band or Piston for a better look? Thanks. Michael

BTW is the B2 Piston cover on the DS or PS? Michael
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Old 05-10-2008, 10:59 PM
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Join Date: Mar 2004
Location: new york/orange county
Posts: 639
Quote:
Originally Posted by Metafly View Post


Thanks. I found these:
http://articles.mbz.org/transmission/b2/why/
http://articles.mbz.org/transmission/b2/repair/ When you say pull off the pan, are you referring to the B2 Band or Piston for a better look? Thanks. Michael

BTW is the B2 Piston cover on the DS or PS? Michael

Passenger side rear, big round cover, push the cover in, remove the round retain ring, then the cover. Remove B2 piston and apply pin and check the piston for any cracks

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