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#1
01-22-2012, 11:49 AM
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driveshaft for transmission swap
I'm in the process of putting a 240d manual transmission into a 300sd. The current challenge is with getting a correct length drive shaft from the transmission to the center bearings. Since the automatic housing longer the existing drive shaft is too short.
I can take it to the driveline shop and have it lengthen but wondering if there might be something in the salvage yard that would work. Does anyone know what make/model might have the correct length driveline? 
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#2
01-22-2012, 11:56 AM
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If you can find the manual transmission type number (like 717.XXX) you might be able to work out whether it was ever fitted by the factory in a W126.
I've been collecting this sort of information here. FSM + EPC data => Chassis / model / transmission / drive train information I hope it helps. It won't give you all of the information you need just yet as I don't have any of the prop shaft part numbers - but perhaps EPC can help you there. If you do get the parts numbers for a particular chassis / engine / transmission type I'd like to hear from you!
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior  Don't leave that there - I'll take it to bits!
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#3
01-22-2012, 06:03 PM
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Typically it has been assumed the automatic trans and the 4 speed are the same length on the W123. So like on my swap of the 617 into a 240D car, we just take four inches out of that short front section. The engine is 4" longer, the trans is backed up by 4" because of that additional length and we shorten the drive shaft by 4" and everything works out. Now you are using the original type engine and if the transmissions are the same length, then the front drive shaft "should" be the same. It is hard to measure the overall length of transmisions unless the are out and you can put them up against a wall. But I would think that your original front shaft would be right.
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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!
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#4
01-22-2012, 09:28 PM
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I'm pretty sure the manual trans is 2" shorter than the auto... the reason you have to shorten the 123 driveshaft is because the 240's engine is shorter, and you reuse the 240's driveshaft and it's too long for the 300 engine... the 300's driveshaft would be too short.
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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 560SL convertible 1987 190D 2.5-5SPEED!!!  1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#6
01-23-2012, 03:07 AM
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This thread will give you am idea the difference in the lengths of an auto and manual trans. this auto is out of an 79 300CD, but Iam sure the SD is about the same length.
240D 4-speed manual swap in 300CD Not sure which 4-spd trans you are going to use, the all aluminium one like in the picture of the old iron box. may both be the same length. Sirnik84 did a 4-spd swap in his 84 300SD reciently, maybe contact him for the dimentions on the DL. Installing a new engine and manual transmission in my SD Charlie
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there were three HP ratings on the OM616... 1) Not much power 2) Even less power 3) Not nearly enough power!! 240D w/auto Anyone that thinks a 240D is slow drives too fast. 80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works Last edited by charmalu; 01-23-2012 at 03:37 AM.
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