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+--- Thread: 6-speed W123 (/showthread.php?tid=3101)
6-speed W123 - juanesoto - 11-08-2011
Hello folks!
I'm planning on putting a 6-speed manul tranny from a W203 into my 617 powered W123 using the Dropnosky method. I already got the tranny (716.648) and the gear selector. I also have two W123 transmissions to take the bellhousing from. I just need to get off my butt and start working on the gig to hold the transmission for welding.
I have several concerns that perhaps you might be able to solve:
1. There's no speedo output in the tranny. Any ideas?
2. Where can I get a disassembly guide for the 6-speed tranny?
3. I'm planning to use my current clutch flywheel setup (617 stock) so I'll have to cut and weld the input shafts as Dropnosky did. Any knowledge on the heat treatment done to the input shafts? After the welding I'd like to have it heat treated.
As soon as I find my camera, I'll post some pics.
Cheers!
RE: 6-speed W123 - aaa - 11-08-2011
Retrofit a 300SD electric speedo setup, assuming the six speed uses a similar electric pickup. Also why not just use some sort of w201 clutch disk that happens to be the same size as the 617 one, I bet those have the right spline pattern.
RE: 6-speed W123 - charmalu - 11-15-2011
As I remember, the W201 uses a 23 spline and the W123 uses a 10 spline in put shaft. I have no idea what the W203 uses.
Charlie
RE: 6-speed W123 - juanesoto - 11-17-2011
Thanks for the input guys.
AFAIK, the W203 tranny does not have speedometer pick up. The W203 uses the ABS sensor signal. I think I might go for a hall effect sensor working on the drive shaft. I just need to figure out what kind of signal the electronic speedo from a W126 or a 1981 W123 uses. This is going to require some brain workout.
As of today, I don't know if I should modify the tranny to fir the 617 or look for a 603 and fit it in my W123... Decisions decisions...
Does anyone know if the 2nd gen 300SD engine mount arms will work in a W123?
RE: 6-speed W123 - aaa - 11-17-2011
Probably not, I recall the 617 126 vs 123 arms looking quite different. Maybe m102 mount arms?
RE: 6-speed W123 - fha772 - 11-18-2011
I've been thinking of going 6-speed in my 280E, but I've been thing of using a BMW M3 gearbox (because they are fairly easy to get and pretty cheap over here.
RE: 6-speed W123 - hansebanger77 - 02-03-2012
(11-17-2011, 11:22 AM)juanesoto Thanks for the input guys.Anyone know what Signal i Need for my swaped Tacho from e 500?
AFAIK, the W203 tranny does not have speedometer pick up. The W203 uses the ABS sensor signal. I think I might go for a hall effect sensor working on the drive shaft. I just need to figure out what kind of signal the electronic speedo from a W126 or a 1981 W123 uses. This is going to require some brain workout.
As of today, I don't know if I should modify the tranny to fir the 617 or look for a 603 and fit it in my W123... Decisions decisions...
Does anyone know if the 2nd gen 300SD engine mount arms will work in a W123?
Its electro tacho but the Signal from the 716.654 6 Speed dont work.
I think its can bus.
RE: 6-speed W123 - Simpler=Better - 02-03-2012
Cheapo motorcycle speedos can be had for ~$100, they work off a magnet at the wheel. You could probably adapt one of those to the driveshaft pretty easily
RE: 6-speed W123 - hansebanger77 - 02-03-2012
But give this the right signal for the tacho?
I want use the 260kmh tach..