drwhosc

So my transmission is leaking. I can keep pouring fluid in it, but I will have to get it rebuilt at some point. I know that these are Merc transmissions and I may be able to find someone local who knows about these, but is there a place where I can ship this puppy out and have it rebuilt???

GregBBRD

I do quite a few of them. They get shipped from all over the world for me to do.

Don't be fooled that these are generic Mercedes units. There are differences that the Mercedes guys are oblivious to....plus the only time to go through the differential section is when these units are off. I take them apart, rebuild the limited slips, reseal them, etc...not just remove them as one piece and set them to the side to be bolted back without touching them.

Also have brand new factory transmissions (exchange). Beautiful to behold. With the current price increases for the new Mercedes internal components, these are becoming more and more attractive.

karl ruiter

I generally avoid rebuilding auto transmissions. I takes a clean room, a methodical hand, and someone who really knows your specific box and all the things that can go wrong with it. Since you do not normally find that in an auto repair shop you end up with problems, hassling over the warranty, shops going out of business, and all manner or headache. So, I normally just put in used. The exception in this case would be Mr. Brown above. He knows his stuff and has the consistent perfectionism required.
Having said that, are you sure you need a rebuild? Could it be pan gasket or oil cooler lines? Both of these go bad consistently.

ROG100

Sent my GTS RogerBox to Greg and he of course did a masterful job - feels like new again and she is out on the street making those crapbox manuals look ****.

Greg is the way to go.

mickster

If I had to do it all over again, I'd have sent it out to Greg.

sstrickstein

Don't make the mistake I did and try to do it yourself. Have Greg or a " qualified Porsche/Mercedes rebuilder do it. If you don't.... You will be pulling it out again. I'm real good at pulling them out for some reason.

drwhosc

Well too late for that. I had someone do it, and they are no longer around, and I have a main seal leak. Shifting well though, but will not last. I sent a PM to Gregg.

Live and Learn.....

sstrickstein

Main seal? The input seal that the torque converter seals in? If that's it your solution could be simple. Although you have to pull the Trans to replace it. The Trans doesn't have to be pulled apart. I understand that seal is easily damaged if the torque converter is not installed correctly.

Captain_Slow

Now this thread is hitting close to home. My transmission shifts fine, but I have the slow drip from the TC grate. I can see the ATF is coming from where the TC meets the transmission. If this is something that I can do myself (I can drop the transmission) I'd like to try. I'm reading the thread posted by Heinrich...the key seems to be making some guide studs from properly threaded bolts to help guide the TC and transmission together without damaging or folding the seal.

This would be a good time to replace TC bearings and replace the TT bearings...but do either of these bearing jobs require more skill/knowledge/tools than the average DIYer has?

sstrickstein

If you have access to a lift and a transmission jack it is easily a job you can do yourself. If your planning on doing it in your driveway its doable but much harder. Visit Youtube and search 928 transmission removal. There is a video that describes the process. I removed my exhaust first, then dropped the suspension as one unit and finally the transmission. The video he keeps the transmission attached to the suspension. I think my way is easier. With a lift, I can get the transmission out of the car in this manner in 3 hours. By the way after doing this 3 times I have to go back in again and either replace the input seal or have the torque converter checked because I am leaving a drop or two every time I park. It doesn't look much but Since I haven't dropped the transmission in the last month I think Im getting rusty and want to practice some more!

Rodrv6

My transmission was also leaking, bad enough that I had to add fluid every few hundred miles and the rear fascia was getting lots of oil drops on it. Turned out to be the vent hose that runs from the top of the plastic fluid reservoir to the transmission case. It's not easy to see or get to, but replacing it solved my leak.

Chalkboss

Being a regular Joe that likes to wrench, I would not say its easy to do but moderately difficult, to do it right. I pulled my trans out on a lift, then went through the oil pump, replacing all seals therein and the tc seals. The hardest part is to get the piston back in without turning the seals inside out. It's easier to skimp and not do everything, but with all the effort better to do it all. Dry as a bone so far with 3k miles, so it can be done. There is a lot of info to be searched here, and also how to adjust transmission. Adjustment of cable and modulating pressure is easy, and can give you shifts however you desire. Of course,as with many systems on these cars, you can't expect it to work as designed if everything else is not up to snuff. Fluid levels, vacuum, kickdown all must be in order, to name the easy ones.

drwhosc

For me getting the transmission removed was not too bad, getting it back in and doing it right was obviously an issue. If you are planning on doing the TT bearings, you will have to drop the TT as well. Also not a bad job. A lot does make life much easier, I do not have one, so I need to find access....