yet another Trans I.D. thread

[scotty b]

Well I searched, went through 3 pages of trans I.D. threads and didn't find an answer to my issue. I have a manual trans. 716, how can I determine what car it was originally from and what the ratios are ? I am planning to put it behind an '84 280e engine and that whole lot will be going in a '74 280c so as you can see, I need to do some parts acquisition planning, a lot of configurating, to make sure I have what I need to make this all work together

TIA

[Frank Reiner]

Lets have a look at the whole trans in a few more pics. And also any more parts that you have accumulated.

Should we understand that the '84 engine is also a M110? Do you realize that the M110 CIS plenum does not clear the W114 inner engine bay structure?

[scotty b]

Yes, I know the intake is a clearance issue. I'm not too concerned about that since metal work is what I do for living I'll take some pics of the trans and post later tonight. I have the whole pedal cluster, master cylinder, shift mechanism from the car the trans was in. A friend of mine that worked on diesel Benz's pulled it several years ago and put it in storage " just in case " He is fairly certain it was a gas car, but isn't positive, hence my concern about gear ratios. FWIW it is an Al. case which if I understand correctly was only in the gas cars ? I also have the flywheel, clutch and pressure plate from that car, but will most likely buy a new setup for the '84 engine. It has a larger I.D. flywheel that has already been balanced to the crank, so I would assume it uses a larger clutch and pressure plate as well ??

[Stretch]

716.210 was fitted to 123.123 chassis => 240D (I'm not sure if it was used on other chassis or motor combinations though)

4 speed

If you want the ratios see the links in this thread =>

Tech spec data

[scotty b]

Maybe I should ask this first.... I am ASSUMING the diesel trans would have had lower gearing, or am I wrong in this assumption ? I also feel like this trans is way to clean to have been in a 20+ y.o. diesel car. Here are some pics that may throw some light on things for those of you with more knowledge than I

[Stretch]

Originally Posted by scotty b

Maybe I should ask this first.... I am ASSUMING the diesel trans would have had lower gearing, or am I wrong in this assumption ? I also feel like this trans is way to clean to have been in a 20+ y.o. diesel car. Here are some pics that may throw some light on things for those of you with more knowledge than I

You are incorrect in your assumption about the gearing. Most of the gearing change was made in the final drive (differential) - light commercial gearboxes had lower first gears but on the whole the passenger car spaces between gears are pretty close.

The parts look like they were taken off the car a decade ago. Perhaps they were cleaned before they ended up on the shelf? And for the record - not all diesel cars are dirty!

[Frank Reiner]

scotty b:

You can check the ratios easily by selecting 1st gear, then counting # of turns of the input shaft for one turn of the output shaft. With the clutch disc on the input shaft the last partial turn can be accurately judged. Be looking for ~3.9:1.

What's the engine #? Stamped on the top left surface of the block, aft of the distributor. 110.9xx?

Flywheels look to be from 617 diesels. What do you know of the engine history?

[scotty b]

Originally Posted by Frank Reiner

scotty b:

You can check the ratios easily by selecting 1st gear, then counting # of turns of the input shaft for one turn of the output shaft. With the clutch disc on the input shaft the last partial turn can be accurately judged. Be looking for ~3.9:1.

What's the engine #? Stamped on the top left surface of the block, aft of the distributor. 110.9xx?

Flywheels look to be from 617 diesels. What do you know of the engine history?

That's good news on the gearing Stretch

The engine was from T walgamuth's car. He sent me some links to the well documented build. He was running the car with that flywheel, though I do not know what trans he he bolted to it. He says the engine has VERY low mileage on it since it was built. As for the cleanliness of the trans, I see no signs the parts were cleaned prior to storage as is evident by the area I cleaned off the get the numbers. Coupled with the fact it was the guy I used to work for who pulled it, he rarely cleaned parts that were going to be in storage.

engine : 11098810008987

[t walgamuth]

Hi that engine should have the proper 280e flywheel attached to it. I can tell you that it is match balanced with the crank so don't remove it or you might have trouble getting it back in the right place. I have the pp and clutch disc for it. The fellow I sold it to was supposed to return the flywheel to me when he installed it with the automatic tranny he was planning to use with it, but you see he never installed it.

I'll sell the clutch and pp reasonably if you want to go with a stick tranny. It came with the five speed od in it but I also ran it with the four speed. The trannies are functionally the same in the first four gears.

I'll pm you with the name of the owner of that five speed if its not been sold.

I don't know if I answered your question or not. I'm in a hurry at the moment so please feel free to pm me if I did not.

[Frank Reiner]

scotty b:

Re: Engine #
110.988-10- is correct for 1984 W123 280E/CE/TE. The -10 indicates the engine was originally equipped with a manual trans. Nominal rating of 185HP. 9.0:1 CR.

Re: Flywheels
On seeing the picture of the two flywheels, my thought was that the one on the engine was a remachined version of the separate one. However, since the engine was originally equipped for manual trans, I now think that the installed flywheel is the original M110 type, as Tom says.