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  #1  
Old 09-06-2010, 05:58 PM
300SD81's Avatar
1981 Mercedes-Benz 300SD
 
Join Date: Aug 2006
Location: University of Georgia
Posts: 1,082
Transmission suddenly slipping badly in first gear - B2 piston?

My transmission suddenly started slipping badly in first gear, the car will move somewhat, but doesn't have any acceleration until it revs up to 4000 and shifts hard into second. Does this sound like the B2 piston problem? Other threads I've found all seem to have issues in second gear as well, but mine seems ok in second. Third, fourth, and reverse are all working fine too. I'd just like to get some confirmation before I spend $100+ on a new B2...

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  #2  
Old 09-06-2010, 08:50 PM
vstech's Avatar
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Location: Mount Holly, NC
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how's your fluid level? it really does sound like B2. it can leak tiny amounts past the seal, and keep 1st out, but work in 2nd. it could also be worn clutches... how often do you rev to 4K?
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  #3  
Old 09-11-2010, 12:35 PM
300SD81's Avatar
1981 Mercedes-Benz 300SD
 
Join Date: Aug 2006
Location: University of Georgia
Posts: 1,082
The problem went away on its own, fluid level was perfect. I'm assuming that the B2 was stuck, so I'm changing it anyway and putting in the new plastic bushing.
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Ich liebe meine Autos!

1991 Mercedes-Benz 560SEL | Megasquirt MS3-Pro | 722.6 transmission w/ AMG paddles | Feind Motorsports Sway Bar | Stinger VIP Radar | AntiLaser Priority | PLX Wideband O2 | 150A Alternator | Cat Delete
1981 Mercedes-Benz 300SD | Blown engine, rebuilding someday...
1981 Mercedes-Benz 300SD | Rear ended, retired in garage.
2009 Yamaha AR230HO | Das Boot

Excessive speeding? It ain't excessive till I redline!
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  #4  
Old 09-12-2010, 10:04 PM
87 300D
 
Join Date: Aug 2010
Location: Western PA
Posts: 4
I've got the same problem have got time to check mine yet. it can be done in the car I take it. Thanks

87 300D

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