1994 e320 Reverse Clutch Replacement (im gonna do it myself.. i think) - PeachParts Mercedes-Benz Forum

benjay · #1 12-01-2006, 05:57 AM

Does anybody have detailed instructions or a manual i can download on the replacement of the clutches in my 722.3 transmission? I have no problem getting the transmission out of the car but from then on I need some instructions. The car is a 1994 e320. I have tried searching the info but have not found specifics. Are there any special mb tools I will need once inside the transmission? Thanks in advance for your help. You guys are the best. benjay

skiier3_9 · #2 12-02-2006, 03:13 PM

PLEASE take/post LOTS of pics of this process. I'm sure I'll have to do it someday on my E320 and would love to see how its done.

benjay · #3 12-04-2006, 05:04 AM

Sure thing! I just need someone who can email me a copy of the tech sheets for this procedure. I can do anything with instructions im just hesitant to rip open the trans without.

benjay · #4 12-04-2006, 05:09 AM

I NEED THE WIS OR SOME KIND OF MERCEDES INSTRUCTIONS ON REPLACING THE REVERSE BANDS IN MY 1994 E320 AUTO TRANSMISSION. i HAVE NO PROBLEM GETTING THE TRANS OUT, JUST NEED INSTRUCTIONS FROM THAT POINT! IF YOU CAN HELP I WOULD BE GRATEFULL OR IF THEY ARE ALREADY POSTED SOMEWHERE COULD YOU SEND ME THE LINK!!! I WOULD BE GLAD TO TAKE PICTS AND DOCUMENT THIS PROCESS FOR EVERYBODY ELSE THAT IS GOING TO HAVE TO DO THIS REPAIR! THANKS BENJAY

david s poole · #5 12-04-2006, 09:29 AM

first of all who diagnosed that reverse clutches need to be replaced? it is not a hard job once the trans is out.too long for e mail but call me and i can walk you through it.

benjay · #6 12-04-2006, 12:29 PM

I have come to that conclusion based upon reading numerous other peoples accounts on this forum of the same problem with the same car.

Symptom: Transmission works flawlessly. Reverse is there one second and gone the next. All forward gears work as does park. just no reverse. Linkage is ok.

Everybodys whos posts I have read have opted to have the job done by someone else. Is it really THAT hard? I can understand the normal joe not wanting to rip the trans out because it takes a while, but thats no big deal to me. Just once the trans is out and on a bench Ill need some instruction. I was also wanting to know of any special tools I might need.

Considering the amount of people that have reported this problem on this forum, This is a very common thing for these cars. Mercedes must have published some bulletin or repair info for their techs to guide them thru this procedure.

david s poole · #7 12-04-2006, 01:40 PM

this is not necessarily the reverse clutches causing this problem.if it was you would have reverse but it would slip when trying to use it.there would appear to be a problem with the reverse piston from your description.this could involve taking apart the front pump assembly which contains that piston and replacing two or more seals.it will always be a good idea to replace the reverse clutches when in that far but i dont think it will fix your problem by itself.

benjay · #8 12-04-2006, 03:24 PM

thanks for the input . What you say makes perfect sense. I have just heard that the piston sticks which causes the reverse band to snap eventually. Either way you are correct because I will probably want to freshen up some other things while in there so I dont have to rip this thing out again soon. Do you know if mercedes makes a rebuild manual for this trans and how i can get ahold of one?

DRICHFL · #9 12-04-2006, 03:58 PM

ATSG Trans manual

http://atsg.biz/

Mercedes 772.3/722.4 Transmission found in 1980 and up with 6 bolt pan. Covers assembly, dis-assembly, diagnosis, and troubleshooting. (83-7224TM)