80 240, 85 300TD. Im wondering if I can slap the good tranny from the wagon onto a 240?

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Overall length and input and output shaft sizes are all the same. It might have just a bit of an upgrade internally being hooked to the 300D.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

thanks! you just enabled me.

there is a 450 dollar 240 with a slipping tranny in town, and I just went to look at it. I happen to have a good auto tranny sitting on the bench, and two more custom manual trannys waiting to be used.

The car runs great, has a little rust, but should make an excellent daily driver 123 for me immediately.

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i wouldn't be too sure about that. i was under the impression there was something mechanically different from the 240d to all other w123 auto transmissions

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I have an 83 240d with tranny issues, and I have an auto from an 81 300 td. The 300td box has a cable operating a pressure valve in the box, the 240d does not. Also, the vacuum shift modulator is on the opposite side of the box. However, it does look like it would bolt on.

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I choose to be happy, even when the Mercedes is being awkward, lol

we'll see this weekend then. The TD auto tranny is a temporary solution until I have some clutch parts here to put in the manual.

Right now the tranny problem is it slips or will not shift into third. The PO was getting up to 55 in 2nd, then manually shifting into drive to get into a higher gear. He says he blew a line on the tranny once, and its been gradually getting worse and the wife wants something newer.

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do you have the VC linkage from the TD? you could hook up the levers to get the bowden cable to work on your 240 until you are like me and have the 5speed 240 going...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Where does one find a suitable 5speed? What vehicle would have the right donor bits suitable to go in a 240d?

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I choose to be happy, even when the Mercedes is being awkward, lol

Any gas or diesel of the same approxiamate vintage has the same five speed I believe. It is a little longer so there is also a driveshaft issue to solve.

You would no longer know the two forty d you just brought home with one installed. They are not too common unfortunatly. If you seriously start a search you should find one eventually.

I have missed a couple myself in the last three years. I will not miss the next one.The most important issue when looking is people claiming they have a five speed. In reality they have the four speed plus reverse and are calling it a five speed. Verify somehow with them exactly what it is or you will waste time.

If You come up with two drop me a line. It should have the shift linkage with it as a bare box might have you hunting for a long time to find the rest. Since you have the automatic your best bet is the whole scap car.

You need the pedal assembly, 240d flywheel, clutch, slave cylinder and plumbing etc. Driveshaft if in a 123 240d would be nice. Just make sure it is marked if you separate the halfs.

i should of known this guys. my mistake. so, for example, a 1986 190d has the same 5-speed as a 190e 2.3-16v.

right barry?

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No the fiver from the 16v is different. It is a getrag and has a dogleg shift pattern with first to the left and down and reverse above it. It also has a 1 to 1 fifth gear instead of od and the rest are closer together ratios.

It is a very rugged unit and much more common than a 123 five speed but still pretty rare.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

t-dub, i know. i was being sarcastic.

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The one thats going in this car is an adapted W201 717.411 overdrive meant for a 190E.
I think there are at least 3 or 4 variations of the overdrive tranny just like this with slightly different ratios, in addition to the 1-1 described above, and probably a couple different 1-1s as well.

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Verdict is that the swap is totally possible, but impractical for the reasons listed by smiffy6four, and additionally some trans cooler reference issues. You would have to bend and twist the 240 cooler lines to meet, or swap the 300 lines.
I removed the TD tranny with the cable, there is a hole on the 240 linkage that it looks like you could make the cable work, or as said before, bring over the valve cover bracket that incorporates the cable attachment.

It looks like it can certainly be done, but for a temporary purpose like mine, its not worth it to make it work. If you simply wanted to replace the auto with another auto, it will probably work fine.

Spent a lot of the day dealing with the TD tranny which had a lot of rusted and seized bolts. I had to grind 3 of the 4 tranny cross member bolts off, and cut off 4 of the 6 driveshaft bolts. Fortunately I lucked out with the bell housing bolts all being in decent enough shape.

How do you remove that cable hook up from the pan side on the 85? I remember on my 83, I could pull the pan and unhook it from inside, but I could not do it on the 85

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some pics to show the differences-

The two trannys together, and the port locations for the oil cooler. On this particular 240 tranny, the oil cooler lines are directly underneath behind the bell. On the auto 300 85, the ports are on opposite sides after the bell. You would have to also swap the lines if you wanted this to work.

As stated before, the vacuum is on the opposite side, but it can probably reach, the 300 has a cable attachment so you would need to grab the valve cover bracket off the 300 to mount to the 240, and the cooler lines. If you do this, remember to get that extra stuff!

Attached Thumbnails

     

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