Could you use the clutch disk from the 6 speed and the flywheel and pressure plate from the 4 speed? That seems a lot easier than modifying the input shaft.

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All Diesel Fleet
1985 R107 300SLD TURBODIESEL
2005 E320 CDI (daily)

LOTS of parts for sale!


EGR block kit
http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html

1985 CA emissions 617 owners- You Need This!
Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst.

Sanden Instalation Guide (post 11):
http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html

I would say oil filter relocation has got to be easier and better than welding castings - but only if it helps with the starter motor relocation of course!

As for the shipping - wow - that seems like a good deal to me.

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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!

I'll show you some pics when the tranny gets here so we can decide the best route to get this through. Speaking of, according to Fedex, the tranny will be delivered to my freight forwarder on 11/17 so I expecto to have it down here by the beginning of December!

BTW, anyone has a W115 intake manifold for sale?

As a side note, I bought some drilled/slotted rotors and 4-piston calipers from a R107 560SL. I'll open another thread to share some installarion pics with you. Also, a while back a did an extensive research on suspension spring for the W123 (here). A few weeks ago I came across a set of HD springs that might make my W123 ride like a champ. I'll also share some pics about that. I already got my Bilstein HDs, so as soon as I get a chance I'll tackle that task. More to come into the money pit...

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1982 W123 300D NA Euro, 300K Miles, 4-speed manual, 3.46 rear diff, early W126 front brakes, Penta rims with 205/60R15 FH900's, custom fitted (by me) audio system, more to come into the money pit... Soon to be installed: Bilstein HD, R107 front discs and 4-piston calipers, HD Suspension springs, wagon front swaybar.

Glad to see I'm not the only one tempted to drop a 6 speed in a W123...wonder how this got on.

My iron box 4 speed is getting a bit rattly and I'm after taller top gear without making the rest taller too, and the more gears to choose from the merrier.

I stumbled across this:
97-03 BMW 540i 6 speed manual transmission e39 - bimmermerchant

I count 10 splines on the input shaft and there's one starter bump in the bell housing each side for some reason. So it may marry up perfectly, just with a new adapter plate which has all the right bolt holes. Even a spot for the starter!

Gear ratios are (after some googling)

4.23 1st, 2.53 2nd, 1.67 3rd, 1.23 4th, 1.00 5th, and .83 6th

And AFAIK the current gearbox is

3.98, 2.29, 1.45, 1. R 3.74

so it'd pretty much be perfect, I could even go for a slightly taller diff and still have stock-ish 1st gear acceleration. And being designed for such a larger engine this gearbox should outlast the car when married to my NA 617.

Still have the gearstick and speedometer drive issues, but they're fixable.

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1978 300D, 373,000km 617.912, 711.113 5 speed, 7.5mm superpump, HX30W turbo...many, many years in the making....
1977 280> 300D - 500,000km+ (to be sold...)
1984 240TD>300TD 121,000 miles, *gone*
1977 250 parts car
1988 Toyota Corona 2.0D *gone*
1975 FJ45>HJ45
1981 200>240D (to be sold...)
1999 Hyundai Lantra 1.6 *gone*
1980s Lansing Bagnall FOER 5.2 Forklift (the Mk2 engine hoist)
2001 Holden Rodeo 4JB1T 2WD

I have had the same thoughts and been waiting for this ^^^ exact transmission to show up at my local wrecking yard.
But the issue is the BMW Getrag 420g is not as strong as you think. There is a design issue with the shift mechanism in which it could tear up the 3rd gear syncros over time. Plus Getrag nor BMW offers a rebuild kit for these trannys. So basically, you pick a good used unit and hope it will last or pay a few $$ for a factory rebuilt unit.



.

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1983 123.133 California
- GreaseCar Veg System

Hmmm good point. I wonder how hard it is to swap the internals over from another used one, as there's cheapish ones on Ebay UK with different bellhousings.

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1978 300D, 373,000km 617.912, 711.113 5 speed, 7.5mm superpump, HX30W turbo...many, many years in the making....
1977 280> 300D - 500,000km+ (to be sold...)
1984 240TD>300TD 121,000 miles, *gone*
1977 250 parts car
1988 Toyota Corona 2.0D *gone*
1975 FJ45>HJ45
1981 200>240D (to be sold...)
1999 Hyundai Lantra 1.6 *gone*
1980s Lansing Bagnall FOER 5.2 Forklift (the Mk2 engine hoist)
2001 Holden Rodeo 4JB1T 2WD

I'm real curious how this eventually works. I too, am rather unhappy with the factory gearing in my 78. At least yours is manual trans! But a 6 speed would be a most enjoyable mod, especially if its not too crazy difficult/expensive.

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2007 Dodge Ram 3500 Cummins Turbo Diesel 4x4
1994 GMC S-15 pickup 4.3 5MT
1985 300 SD
1978 300 CD
1962 220-S Fintail - awaiting restoration

So, how this this go ?

So, how did this work out ?

OP's last activity on this forum was in 2014. Unless he checks in or someone still in touch tells him his thread is back alive, it's unlikely we'll ever know.

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Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)