Rubber transmission mount for manual transmission

[Charles 230SL]

Hello,
Does anyone know whether the rubber transmission mount for a manual transmission is different than the one for an automatic?

I took my (4 spd manual) transmission support plate off and I just noticed that the bottom of the rubber mount (where the 19mm bolt attaches) does not align correctly with the slot in the plate (see pictures).  The bottom of the rubber mount is not oriented correctly - it needs to rotate 90 degrees to align with the longitudinal slot in the support plate.

The part number on the rubber mount is MB 120 223 0412 and I’m wondering whether this mount was meant for an automatic transmission rather than a manual transmission.  Since the mount does not mesh with the slot, the rear of the transmission may be sitting too high.

Anyone ever ran into this setup? thanks, Charles

[mbzse]

.../... the mount does not mesh with the slot.../...

There must be (thick) washers both sides of the (slotted) large plate. They go under the rubber tranny mount as well as under the head of the large hex screw.
The formed metal mount on the tranny support rubber is for holding it with a spanner during tightening down (and to enable getting it off, once an old mount has separated...)
/Hans in Sweden
.

[Charles 230SL]

got it, thanks Hans... just wonder why Bud's left out the washers/spacers when they installed the transmission. 

[Charles 230SL]

I'll be installing new U-Joints shortly and while I have the driveshaft out, I thought I'd install the correct parts for my transmission mount. I have an early 230 and you can see from pictures I posted in 2015 that there's some hardware and rubber items missing..
The rubber mount (item #20, MB 120 223 04 12) looks fairly new and won't need to be replaced. All the remaining hardware/rubber in the diagram is missing. I'm about to order the parts from Mercedespartscenter.com and with the exception of item #39 Buffer Disk, I've found all the MB part numbers and Mercedespartscenter.com has them in stock.

Would anyone happen to have (or know where I can get) the MB part number for item #39 Buffer Disk? I'd like to get the parts ordered as soon as possible and have them ready to go when I replace the u-joints. thanks,,charles   

[cfm65@me.com]

Hi Charles,
To answer your question re manual/auto gearbox mounting difference. Short answer is NO, they are the same. It is also the same part used as engine mounts in the older 120 series cars, ie 180, 190, 220 Pontons as well as the 190SL.
If the holes do not quite line up, just give a slight push sideways.
Regards
Chris

[Jonny B]

Charles,

I looked at each of the full parts books for the 230 SL and all of them do not show the item 39 as a separate part, the two items that your diagram show to make up part 39 are (listed under Engine Suspension Group 22/24 Table 11):

Bellows (this is the part that is greyed out on your diagram - at the top) - 111 224 01 82
Rubber Buffer (item 30 in your diagram) - 121 987 00 39 with a footnote that indicates used up to chassis 12864

Note- In the big parts book under part 30 are listed the following items
Hex head screw (2 needed) 000933 008016
Lock washer (2 needed) 000127 008203
Hex nut (2 needed) 000934 008008

[wwheeler]

As a confirmation, That trans mount looks exactly the same as the rear motor mount on my '60 220SE Ponton coupe. Same rubber bellows, same funny flat formed metal washer, same long bolt with a rubber buffer washer that goes under the head. Not sure that helps.

[Charles 230SL]

thanks guys, Jonny I really appreciate you taking the time to look up those part numbers for me.

I've been searching (CONUS) MB sites for the Bellows (111 224 01 82) and Rubber Buffer (121 987 00 39)..but no luck yet.
hopefully I won't have to have them shipped from overseas.,thanks again, chas

[Jonny B]

You might want to check out SLS:

https://www.sls-hh-shop.de/main/en/mercedes-230-280sl-w113-/22-enginemounts
They show number 39 as being available.

[Charles 230SL]

yes, SLS is where I found some of the part numbers. Special thanks to Tom Hansen for providing the part number for the rubber buffer: 000-224-00-82 (#39 in the SLS diagram).   

Incidentally, I found the attached 230sl mount instructions from a posting by jeffc280sl dated Oct 2009: https://www.sl113.org/forums/index.php?topic=11593.msg77871#msg77871. Fig 24-1/4 really helps by showing how the mount is assembled, but now I've noticed there's an adjustable "limit stop" (113-242-00-72) I'm missing - just seems like a whole lot of rubber and hardware for a transmission mount.

[Jonny B]

Ah yes, nothing (!) is simple on a Pagoda

[ja17]

Later W113 cars, did not use the long through bolt and nut. They simply used a short bolt from below into the mount.

[Charles 230SL]

I'm trying to put together an inclusive list of all the rubber/hardware needed for the early 230SL transmission mount and per earlier message I discovered there's an an adjustable "limit stop" (113-242-00-72) on the long through bolt. SLS shows this as a "threaded washer" and Niemoeller shows it as a capture nut.

Has anyone ever seen this threaded washer if so, anyone got a picture of it? Note that it's only found on early 230SL's with the long (80 mm) mounting bolt. thanks x 1,000,000, Charles

[Sead]

I'm trying to put together an inclusive list of all the rubber/hardware needed for the early 230SL transmission mount and per earlier message I discovered there's an an adjustable "limit stop" (113-242-00-72) on the long through bolt. SLS shows this as a "threaded washer" and Niemoeller shows it as a capture nut.

Has anyone ever seen this threaded washer if so, anyone got a picture of it? Note that it's only found on early 230SL's with the long (80 mm) mounting bolt. thanks x 1,000,000, Charles

Have you ever found this "Kontermutter" or Threaded washer with Nr 113 242 0072?

I am at same problem now getting all needed parts together for transmission mount...

[Charles 230SL]

hello Sead, for an early 230SL there is no treaded washer; see the diagram in Reply #10 posted by 66andBlue at:
https://www.sl113.org/forums/index.php?topic=25552.msg192235#msg192235.

The tranmission mount diagram in Reply #10 is correct for an early 230SL.

[Sead]

hello Sead, for an early 230SL there is no treaded washer; see the diagram in Reply #10 posted by 66andBlue at:
https://www.sl113.org/forums/index.php?topic=25552.msg192235#msg192235.

The tranmission mount diagram in Reply #10 is correct for an early 230SL.

Hello Charles,
I spent few hours researching about this last night 

Im sure that there has to be a "threaded washer/Kontermutter" between the rubber mount and the transmission plate.
Please see my attached photos.

My Werkstatthandbuch / BBB shows it clearly for 230SL. It is Pos. Nr. 20. Also see the description about putting the mount together. It is in German.
Screw in the hexagon screw (6) until the distance "a" is reached. ... Then counter (lock) the screw (6) with the counter nut (20).

My EPC also show two numbers A113 242 0072 and 0272 along with Pos. Nr. 24. which is a spacer washer 1 mm thick you are reffering to. These are listed only for 230SL.

Sead

[Charles 230SL]

Sead, the image below is correct for 230s up to VIN#012864. Note that the 80mm Hexagon Screw (#6) is threaded into the rubber mount and locked in place by the Hexagon Nut (#19).

[Sead]

Sead, the image below is correct for 230s up to VIN#012864. Note that the 80mm Hexagon Screw (#6) is threaded into the rubber mount and locked in place by the Hexagon Nut (#19).

yes, thats correct. And is stated in step nr. 10 in BBB, see image.

But we can not ignore clear instructions in BBB in step 8 I wrote above!

[Charles 230SL]

The instructions in BBB Step 8 are misleading; step 8 says "..screw in the hexagon screw (6) until dimension "a" is reached...and then lock the screw (6) with lock nut #16 or #20. Note that #16 is the wrong hex nut - it is actually #19 in the diagram. Also note that #20 is a spacer not a locknut. 

SLS and Niemoeller have these mislabeled; SLS shows 20 as "threaded washer" and Niemoeller shows it as a capture nut. As I stated in my November 9th 2017 posting, the SLS picture is somewhat confusing for someone with an early 230sl - it sent me down a rabbit trail searching for part numbers for those "threaded washers".