Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
Hi, Researching the web suggested the car can be driven, without causing any further damage, if it's the B2 Servo. This because the B2 only affects the car getting into 1st 2nd gear, 3rd, 4th and reverse are fine. The trick is getting the transmission into 3rd or 4th, one suggestion was to remove the transmission vacuum hose which could help that happen faster. Can anyone tell me where the vacuum hose is located (picture if possible)? Does this make sound reasonable? I am not looking to continue drive without repairing, just trying to find a repair shop who will do the work and get it there without towing. Thanks, Bob ARTICLE: But, things could be worse, the car is drivable when this failure occurs, although it takes some patience. It's worse when cold, and is made worse by how much load you put on it. The object of driving a car with a bad B2 piston is to never give it much load in 1st and 2nd gears. Think of parking on a hill facing down. You want to get the car into 3rd as soon as you can and 3rd and 4th are unaffected by even catastrophicB2 failure. You might even consider pulling the transmission vacuum line so it shifts way much too early into 3rd. I did. Seems to make driving in a car with this problem a little easier. -Original Message- From: Robert Koziak rkmerce...@aol.com To: mercedes mercedes@okiebenz.com Sent: Sat, Aug 10, 2013 8:31 pm Subject: Re: [MBZ] Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!! Thanks to everyone for the quick responses! Tomorrow I am going to see if it's worth trying to fix myself. I have limited time off in the next few weeks and really need this car back in action fast. Otherwise there is a local transmission shop a mile away I used in the past. Armed with the information everyone provided maybe it will only cost a few hundred dollars. My son really loves the car..he is 26 years old and I bought the car two weeks before he was born. He loves the comments he gets from admiring Mercedes Benz enthusiasts so I would love to keep it running! Does that sound reasonable for a transmission shop to charge 2 to 3 hours labor plus parts? Bob BobMessage- From: Mitch Haley m...@voyager.net To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sat, Aug 10, 2013 7:58 pm Subject: Re: [MBZ] Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!! Kaleb C. Striplin wrote: It's broken no doubt about it. Not a big deal to replace, most shops will just tell you the tranny is bad It's possible the B2 band broke or the B2 adjusting screw backed out, but in a 1983 I think a busted piston is far more likely. Mitch. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
Robert Koziak wrote: Hi, Researching the web suggested the car can be driven, without causing any further damage, if it's the B2 Servo. This because the B2 only affects the car getting into 1st 2nd gear, 3rd, 4th and reverse are fine. The trick is getting the transmission into 3rd or 4th, one suggestion was to remove the transmission vacuum hose which could help that happen faster. Can anyone tell me where the vacuum hose is located (picture if possible)? Does this make sound reasonable? Not to my thinking, but I've never done it. If the shift RPM is controlled by a vacuum signal, wouldn't a total loss of vacuum give you upshifts at maximum RPM when you want minimum RPM? Mitch ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
Mitch Haley wrote: Not to my thinking, but I've never done it. If the shift RPM is controlled by a vacuum signal, wouldn't a total loss of vacuum give you upshifts at maximum RPM when you want minimum RPM? I think your trans gets its throttle signal from a Bowden cable, and the hose they are talking about is probably to the modulator. Vac loss to the modulator would give maximum shift firmness. I don't know if that would give it any more drive in the gears that depend on the failed B2 band, but it would yank your teeth out when it finally catches 3rd gear. Mitch. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
When mine failed I found it very difficult to drive, but possible. I'd suggest taking it on a short drive around the neighborhood, assuming you're in a low-traffic area, to see if you feel like it's practical/safe to attempt driving to the shop. The vacuum hose connects to a switch valve at the top of the engine valve cover. The valve is tied into the throttle linkage and has a bunch of vacuum lines connected to it. The line to the transmission runs down and behind the engine. Note that if you disconnect any vacuum lines you will want to plug the open ends (golf tees work well) so that your other vacuum functions (engine shut-off, door locks, etc.) continue to work. Allan Robert Koziak rkmerce...@aol.com writes: Hi, Researching the web suggested the car can be driven, without causing any further damage, if it's the B2 Servo. This because the B2 only affects the car getting into 1st 2nd gear, 3rd, 4th and reverse are fine. The trick is getting the transmission into 3rd or 4th, one suggestion was to remove the transmission vacuum hose which could help that happen faster. Can anyone tell me where the vacuum hose is located (picture if possible)? Does this make sound reasonable? I am not looking to continue drive without repairing, just trying to find a repair shop who will do the work and get it there without towing. Thanks, Bob ARTICLE: But, things could be worse, the car is drivable when this failure occurs, although it takes some patience. It's worse when cold, and is made worse by how much load you put on it. The object of driving a car with a bad B2 piston is to never give it much load in 1st and 2nd gears. Think of parking on a hill facing down. You want to get the car into 3rd as soon as you can and 3rd and 4th are unaffected by even catastrophicB2 failure. You might even consider pulling the transmission vacuum line so it shifts way much too early into 3rd. I did. Seems to make driving in a car with this problem a little easier. -Original Message- From: Robert Koziak rkmerce...@aol.com To: mercedes mercedes@okiebenz.com Sent: Sat, Aug 10, 2013 8:31 pm Subject: Re: [MBZ] Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!! Thanks to everyone for the quick responses! Tomorrow I am going to see if it's worth trying to fix myself. I have limited time off in the next few weeks and really need this car back in action fast. Otherwise there is a local transmission shop a mile away I used in the past. Armed with the information everyone provided maybe it will only cost a few hundred dollars. My son really loves the car..he is 26 years old and I bought the car two weeks before he was born. He loves the comments he gets from admiring Mercedes Benz enthusiasts so I would love to keep it running! Does that sound reasonable for a transmission shop to charge 2 to 3 hours labor plus parts? Bob BobMessage- From: Mitch Haley m...@voyager.net To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sat, Aug 10, 2013 7:58 pm Subject: Re: [MBZ] Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!! Kaleb C. Striplin wrote: It's broken no doubt about it. Not a big deal to replace, most shops will just tell you the tranny is bad It's possible the B2 band broke or the B2 adjusting screw backed out, but in a 1983 I think a busted piston is far more likely. Mitch. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Allan Streib ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
Not to my thinking, but I've never done it. If the shift RPM is controlled by a vacuum signal, wouldn't a total loss of vacuum give you upshifts at maximum RPM when you want minimum RPM? On the diesel I thought that the vacuum signal mainly affected the firmness of the shift not the shift point itself. I could be wrong about that though. On my 300D the modulator diaphragm is leaking so I don't get any vacuum signal to the transmission. It shifts very firmly as a result. Allan -- 1983 300D 1979 300SD ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
Mitch Haley m...@voyager.net writes: I think your trans gets its throttle signal from a Bowden cable, and the hose they are talking about is probably to the modulator. Vac loss to the modulator would give maximum shift firmness. I don't know if that would give it any more drive in the gears that depend on the failed B2 band, but it would yank your teeth out when it finally catches 3rd gear. Yes, you're right. I forgot about the cable. -- Allan Streib ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
Went out for a test drive.as stated on level ground I could coax it into gear and once it hit 3rd and 4th the car ran fine. But it did not work well going up a hill! Definitely symptomatic of the B2 Piston failure so I think I will get away without getting a new transmission thanks to the group. I will visit the Transmission Shop tomorrow morning armed with the problem and solution and see if he will take on the task and how much. Will pass on the results. Bob -Original Message- From: Allan Streib str...@cs.indiana.edu To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sun, Aug 11, 2013 12:39 pm Subject: Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!! Mitch Haley m...@voyager.net writes: I think your trans gets its throttle signal from a Bowden cable, and the hose they are talking about is probably to the modulator. Vac loss to the modulator would give maximum shift firmness. I don't know if that would give it any more drive in the gears that depend on the failed B2 band, but it would yank your teeth out when it finally catches 3rd gear. Yes, you're right. I forgot about the cable. -- Allan Streib ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
Allan Streib str...@cs.indiana.edu writes: The vacuum hose connects to a switch valve at the top of the engine valve cover. The valve is tied into the throttle linkage and has a bunch of vacuum lines connected to it. The line to the transmission runs down and behind the engine. Actually I'm wrong about that... just went out and looked at mine and the vacuum modulator line seems to tee directly off of one of the main lines. I had assume it'd be tied into the throttle-actuated valves somehow. Allan -- 1983 300D 1979 300SD ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
Should be hooked to the vacuum valve on the IP. On 8/11/2013 5:03 PM, Allan Streib wrote: Allan Streib str...@cs.indiana.edu writes: The vacuum hose connects to a switch valve at the top of the engine valve cover. The valve is tied into the throttle linkage and has a bunch of vacuum lines connected to it. The line to the transmission runs down and behind the engine. Actually I'm wrong about that... just went out and looked at mine and the vacuum modulator line seems to tee directly off of one of the main lines. I had assume it'd be tied into the throttle-actuated valves somehow. Allan ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
There's a good chance mine isn't right. The PO had obviously worked on the vacuum plumbing because it's all connected with plastic tee fittings not the proper rubber wye fittings. Anyone have a diagram of how the lines are supposed to connect? Allan Kaleb C. Striplin ka...@striplin.net writes: Should be hooked to the vacuum valve on the IP. On 8/11/2013 5:03 PM, Allan Streib wrote: Allan Streib str...@cs.indiana.edu writes: The vacuum hose connects to a switch valve at the top of the engine valve cover. The valve is tied into the throttle linkage and has a bunch of vacuum lines connected to it. The line to the transmission runs down and behind the engine. Actually I'm wrong about that... just went out and looked at mine and the vacuum modulator line seems to tee directly off of one of the main lines. I had assume it'd be tied into the throttle-actuated valves somehow. Allan ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Allan Streib ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] ADDED Automatic Transmission issue 1983 300D 195K. Shifts in Reverse but issue with Forward. Help!!!
I'd look for an indie Mercedes shop first, there's a better chance that they have done a B2 replacement than a generic tranny shop. If you can find a tranny shop that specializes in MB and BMW, then that's even better (we had one in Norman, OK). On Sun, Aug 11, 2013 at 3:07 PM, Robert Koziak rkmerce...@aol.com wrote: I will visit the Transmission Shop tomorrow morning armed with the problem and solution and see if he will take on the task and how much. Will pass on the results. Bob -- OK Don They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety. - Benjamin Franklin 1775 in this world nothing can be said to be certain, except death and taxes. - Benjamin Franklin 1789 2013 F150, 19 mpg 2012 Passat TDI DSG, 45 mpg 1957 C182A, 12 mpg - but at 150 mph! ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
