Interesting! I could probably save quite a bit at my local dealership as well, but I'm afraid they've never even serviced a GT before. The one I'm going to is an AMG certified dealer so I feel more confident making the drive to have it serviced there.

 

I completely agree. If a dealer doesn’t have an AMG-certified technician, it’s not worth the risk—especially when it comes to servicing the Getrag DCT transaxle.

 

Interesting and valid points. I wasn't aware technicians at the dealer weren't certified.

 

I'm sure they are certified. But we're talking AMG certified.

 

I understood. Thats what I was referring to. AMG Certified and not just MB certified

 

Oh got it. 😊

 

Really dumb question but I had to disconnect the transmission lines that shift the transmission drive selection. I'm trying to figure out which fluid needs to be replaced as mentioned there are two types. Any help is very much appreciated.

 

What year and model is your vehicle?

 

it’s a 2019 AMG GT

 

Here is some helpful info:

The transaxle has two compartments – A Differential side that holds the MB 236.26 GL5 gear oil, and a Dual Clutch Transmission side that holds the MB 236.25 DCT-F3 trans fluid especially formulated for the clutches.
Both of these fluids are produced by Shell Oil company and the only brands MB approves for use in the 7DCL750 transaxle.
Other off-brand products might, or might not work, but the gamble becomes yours. For off brand, make sure they state the MB 236.26 and 236.25 respectively.

Here is a video for transaxle fluid change for the older AMG SLS, but once you get to the actual transaxle part, it is the same as for the AMG GT: and another short video about the fluid temperature and fill:
I also attached the MB WIS fluid change procedure pdf

These are the items you will need for the fluid change:



You may also want to visit post #10 and #17 above for more info

 

I forgot to mention:

The fill quantities are: Differential side: 3.7 liters / 3.9 qt of gear set GL.5 MB 236.26 Shell Spirax S5 ATE 75w-90 oil, and Transmission side: 7.8 litters / 8.25 qt of the hydraulic ATF MB 236.25 Shell TF DTC-F3 oil.

 

Excellent! Thanks so much!!

 

So I added the new 236.25 transmission fluid and I'm not able to get the transmission past 1st gear. Putting it in reverse and drive are quite clunky. I tried the transmission adaptation procedure but it failed saying it could be the fluid level. I added 8.25 quarts. Any ideas on what I'm doing wrong?

 

while on the lift, did you run up and down the gears several times? Did you bring the fluid temp to 140?

 

Yeah it’s on the lift. It will only go in first, reverse and park.

 

Was the car in N gear when you run the process?

How much fluid did you remove during the drain? Did you add that amount plus 1L?

did you emptied and refill the correct side? Trans vs. Diff?

other than the above, I am not sure what is going on

 

could your current issue have to do with the above?

 

I added 8.25 quarts of fluid to the trans since that was the fluid that escaped while pulling the transmission. The car was off and in park while I put the trans fluid in. I guess I may have missed a step as I didn't let the excess out of the fill port after filling it, seems like an odd step.

 

So I re performed the process and had the car in neutral as I refilled it and I'm getting the same results. It clunks into gear and will go into drive (1st gear only), reverse, neutral and park. Any idea on what might be the issue?

 

Could it be connected to disconnecting the transmission lines that shift the transmission drive selection?

 

No, I had to disconnect the lines to drop the transmission because I replaced the rear main seal. I had to replace the trans fluid due to fluid escaping while removing the lines.

 

Try to connect with @Connecticut GTS who seem to be an expert now on repairing these transaxle, he may be able to guide you. You cn get some additional info in this thread: https://mbworld.org/forums/coupe-roa...iy-repair.html

 

In case you have not seen this thread, its has a lot of useful information about servicing the transaxle: https://mbworld.org/forums/coupe-roa...e-caution.html

 

Hey folks - yes I've connected with c34webb. This is a frustrating experience I'm sure. I'm sure any of us would have uncomfortable concern with any odd noises coming from our cars - and unfortunately many noises have been reportee. Any "thud" out of park to neutral or into gear would make me wonder if the park lock is gooed up by common grime and grit getting into the actuator through the park lock bolt which is secured from the outside of the transmission casing. But the fact he can get into gear is weird. Any thud heard may be the synchronizer ring not being lubricated enough to slide over the first gear after the SAP sends the signal from the SAP (shift actuator plate).

When changing gear fluid it's so crucial to run the car a few hundred feet, put it back on the lift, open the filler screw and top off the fluid until it drains out of the filler hole. To do so, one must use an m18x1.5 filler adapter which allows fluid to flow out of the device, but any resistance or fluid moving against the adapter (overflow) will start to dribble out. This is an inexpensive, and very well made unit: I'd definitely start with verifying fluid is in the transmission properly. 7 liters of DCT fluid and 3 liters of gear oil is spec.

By the way a reminder, I have a new manual updated with a few odds and ends. You can find version 1.3 on my shared drive. It gives all the specs and how-to for the fluid chanegs at the bottom of the manual. Getrag 7DCL750 Ferrari AMG GT Ford GT Repair Docs

 

Thank you @Connecticut GTS ,I hope c34webb issue can be resolved with a straightforward solution. As we all know, German engineering documentation is highly structured and must be followed precisely—any deviation can easily lead to unintended problems. I made sure to include many relevant documents and instructions in my earlier post to help prevent that from happening. Thank you as well for the additional advice.