w124 no forward gears

[johnnyboy1234]

I have searched the site and I can,t seem to find anything resembling this issue. Driving through a junction, stopped and then no forward movement at all, only drives in reverse. Got a clunk like, if a manual box slipped out of gear. Anybody got any ideas as to what might be wrong. Engine is running fine and reverse is also perfect.

As usual on this forum I thank everybody in advance for the past and future assistance. I only come in here when I have a car problem, must make it my business to get in more often.

 

[jaymanek]

hmm doesnt sound good...

 

[Mercedes cozy]

is your car auto or manual

 

[bolide]

AFAIK there's a forward / reverse mechanism that can fail. I bought a car where the job had been done - it was in the history file. It didn't involve a full gearbox rebuild

Nick Froome
www.w124.co.uk

 

[grober]

Sounds as if you might??? have the B2 PISTON FAILURE on the 722.xx box. Good news is that its probably repairable by a specialist transmission rebuilder. Bad news is that the box has to be removed from the car or at least dropped to affect repairs. There's more info here if it is that- no guarantee of course.
http://web.archive.org/web/20060901041723/http://transmission.articles.mbz.org/b2/

 

[nick mercedes]

I have searched the site and I can,t seem to find anything resembling this issue. Driving through a junction, stopped and then no forward movement at all, only drives in reverse. Got a clunk like, if a manual box slipped out of gear. Anybody got any ideas as to what might be wrong. Engine is running fine and reverse is also perfect.

As usual on this forum I thank everybody in advance for the past and future assistance. I only come in here when I have a car problem, must make it my business to get in more often.

Has it got any transmission fluid in it?

 

[Number_Cruncher]

>>Sounds as if you might??? have the B2 PISTON FAILURE on the 722.xx box.

Yes, that sounds like a possibility - there must be enough fluid in there to allow the gearbox to build pressure to reverse.