4 Speed 300SD in the works - Page 2 - PeachParts Mercedes-Benz Forum

DeliveryValve · #16 01-01-2009, 07:51 PM

Quote:

Originally Posted by bgkast

....Try a search for "SDS" here on this forum for info on another manual SD

Link to 300SDS

Quote:

Originally Posted by YoungBenz

Hahaha. ..... Does anyone have any info about getting the mechanical and electrical speedos to work together? ....

From that Thread:

Quote:

Originally Posted by Apotheoun
...... There is a lot of thought planning and measuring twice involved before cutting. You will need to invent or create a home made rotational electronic pulse signal generator to run the speedometer, odometer, and cruise control, or you will have nothing to read on the dash.

This is the case with my conversion, which was finally made right. It formerly utilized a poorly hooked up 240D speedometer that was horribly inaccurate, and now it has a correct 300SD speedometer. To make it work though, Kurt had to invent a new signal generator by welding four magnets onto the drive shaft and attaching a nearby sensor, completely hand wrought. It works great, but nearly self destructed in the first two miles due to faulty clearances. The magnets are still bent over from the initial snafu, but work just fine. What a noisy racket that made!

t walgamuth · #17 01-02-2009, 11:52 AM

Be sure to mark the flywheel from the engine you are planning to use and its position on the motor. Then have it and the fw you want to install for neutral balance. If they are both neutrally balanced you are good to go. If not you must match balance the new fw to the existing motor's fw.

Most 123s and 126s seem to have neutrally balanced fws but some do not. In about four cases I had one that was not neutral.

I would love to have a 126 300sd with a stick....especially a fiver.

StaggerLee · #18 01-02-2009, 12:09 PM

Unless you can get a measurement from another car that has the same conversion, I would drop the engine and trans into place and then take your measurements. The best way is to use a long stick as opposed to a tape measure so you eliminate any sag.

I had a custom one made in Portland for around $400 delivered to Seattle.

DrewGerhan · #19 01-02-2009, 03:57 PM

Quote:

Originally Posted by StaggerLee

Unless you can get a measurement from another car that has the same conversion, I would drop the engine and trans into place and then take your measurements. The best way is to use a long stick as opposed to a tape measure so you eliminate any sag.

I had a custom one made in Portland for around $400 delivered to Seattle.

Thats what I want to do. Do it once, do it right.

Is that $400 for real? Was that for a whole new shaft or just having the original lengthened? I was just going to lengthen mine, if possible.

I did get all the parts today. $87 all said and done. I got the transmission, flywheel, pressure plate, clutch disc, pedal assembly, shifter assembly and linkage, brake reservoir, slave cylinder, associated hose and line, and every nut and bolt that came out. Does it sound like I missed anything?

winmutt · #20 01-02-2009, 04:00 PM

Quote:

Originally Posted by StaggerLee

Unless you can get a measurement from another car that has the same conversion, I would drop the engine and trans into place and then take your measurements. The best way is to use a long stick as opposed to a tape measure so you eliminate any sag.

There is no need for this as the correct size is posted in several places on here and other forums.

DrewGerhan · #21 01-02-2009, 04:17 PM

Quote:

Originally Posted by winmutt

There is no need for this as the correct size is posted in several places on here and other forums.

Measurements even going into a w126? Could you point me to them?

winmutt · #22 01-02-2009, 05:13 PM

Oh ah . Forgot about that. I do believe it is the same however. If it was different in either direction you could use an OEM one.

t walgamuth · #23 01-02-2009, 05:15 PM

I had a new front half ds fabbed locally for less than 200 a couple of years back.

DrewGerhan · #24 01-03-2009, 02:19 PM

Quote:

Originally Posted by t walgamuth

I had a new front half ds fabbed locally for less than 200 a couple of years back.

Less than $200 I could live with, but for $400 I might as well give up the swap. If I got the drive shaft from the donor 240, could I have the shop use that to lengthen the shaft that is currently in my SD? I was reading online and everyone said that the most expensive part of a custom shaft is the new metal.

Stevo · #25 01-03-2009, 02:58 PM

Quote:

Originally Posted by YoungBenz

for $400 I might as well give up the swap.

Your going into this project with a budget of under $400

DrewGerhan · #26 01-03-2009, 03:13 PM

Not entirely. I just don't feel that it is necessary to spend $400 for a driveshaft. My buddy says he knows a place locally that does good work. I'm going to give them a call and see whats what.

charmalu · #27 01-03-2009, 03:49 PM

Wasn`t it ICEFIRE that did a Disel swap into a SEC? Do a search on his name.

The haynes manual has a good diagram of the manual trans.

Charlie.

DrewGerhan · #28 01-04-2009, 12:45 PM

Quote:

Originally Posted by charmalu

Wasn`t it ICEFIRE that did a Disel swap into a SEC? Do a search on his name.

The haynes manual has a good diagram of the manual trans.

Charlie.

Yeah I have the Haynes manual for reference and what not.

On another note, my buddy and I were messing with the trans last night. I was taking everything apart to clean, paint, and relube. My buddy was examining the trans. He found that the input shaft has, what he called "a good bit" of wiggle to it. Only side to side though. Does this indicate a rebuild? I probably won't be installing until spring break at the earliest just cause I want to do everything right, so I have plenty of time. Anyone know where to get a rebuild kit for it?

lutzTD · #29 01-04-2009, 02:41 PM

Quote:

Originally Posted by YoungBenz

Yeah I have the Haynes manual for reference and what not.

On another note, my buddy and I were messing with the trans last night. I was taking everything apart to clean, paint, and relube. My buddy was examining the trans. He found that the input shaft has, what he called "a good bit" of wiggle to it. Only side to side though. Does this indicate a rebuild? I probably won't be installing until spring break at the earliest just cause I want to do everything right, so I have plenty of time. Anyone know where to get a rebuild kit for it?

in all of the MB manual trans I have you can wiggle the input shaft side to side. I do not know what the spec is but there is a spec amount for this. The one in my car wiggled pretty much and it seemed excessive but I figured I would try it out. no issues at all so far with about 15K miles on it. before you pull it apart I would do more research on the allowable amount of movement

bgkast · #30 01-04-2009, 03:44 PM

My driveshaft for my manual swap also cost in the $400 range.

I'm not sure I would want a manual in an SD. It's such a nice, big, comfortable cruiser in stock form.