I've decided to keep the engine and the transmission from my 1984 300D (94K miles on it) and use it for a "out ob the box" project. Diesel trike: hence I would like to know which domestice differential ratio will be ideal to match the automatic transmission with. I am looking for something that will take advantage of the torque for faster accelleration.

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1984 300D, 1972 LT1 Corvette, 2014 Artic White 3LT/Z51 C7, 2013 650i Convertible BMW, 1994 Kawasaki Vulcan, 1992 Yamaha Seca II and 1996 Dodge Ram 2500.

I'm not quite sure what you're asking - I assume domestic differential means something from the US of A and that this is for the trike project...

...all I can say is that most OM617a's had the 3.07 rear end ratio on a tyre / wheel combination of 195/70 R14

The differential was changed to 2.88 in the last years of production of the W123

You kind of need to consider your ideal sized wheel / tyre combination to work out what how fast you want to drive towards sharp bends on three wheels!

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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 agree... with the stock configuration a nearly 4000lb car have adequate acceleration...

in a 750lb trike... uh... IDK... scary. factoring in the turbo lag, that could REALLY be a scarry vehicle to drive...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
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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!

It's going to be hard to predict what's best...everything is a trade off. I'm running a 2.47 in my project car and am very happy. I'm trading a bit of off-the-line performance for quiet, economical cruise. Many would be unhappy with this setup but it's exactly what I want.

I'd just swap in what you've got and adjust as needed after you've got the beast on the road and have a chance to evaluate any changes.

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica

I'm a big fan of my 2:65 LSD, and if I ever had to replace the car, I would take the 2:65 LSD with me.

I had a 2.47 in my 300SD and loved it. It never felt slow to me. Since trikes are so light I would imagine you could use a 2.47 and accelerate quite quickly.

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2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold

WMO:

Note that three wheeled vehicles that are reasonably stable, and that steer properly, have two wheels forward, and one aft. If the vehicle is constructed as rear wheel drive, there is, obviously, no need for a differential at all. As to drive ratio, that is an entirely different matter.

Pretty sure a 616 could flip a trike without too much work.

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Thank you everyone for the great inputs, yes I was referring to domestic as in Ford or GM diff to match the eng and trans from the 300D. It was the easiest design I put together vise a reverse trike, I guess with the lighter mass to move standard ration will do me fine. I am working on the reverse trike with deal wheels and still appears to be a trike vise a quad.

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1984 300D, 1972 LT1 Corvette, 2014 Artic White 3LT/Z51 C7, 2013 650i Convertible BMW, 1994 Kawasaki Vulcan, 1992 Yamaha Seca II and 1996 Dodge Ram 2500.

Oh wow just like one of these but with an OM617 up front!

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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!

This is what I would like to duplicate with the 617/trans as the power plant.

Attached Thumbnails

 

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1984 300D, 1972 LT1 Corvette, 2014 Artic White 3LT/Z51 C7, 2013 650i Convertible BMW, 1994 Kawasaki Vulcan, 1992 Yamaha Seca II and 1996 Dodge Ram 2500.

I realize that Morgan is in no way practical, but I still think it's pretty sick. If building something similar with a turbo 617 for power you'll want to use a fairly tall final drive ratio since it will have rather a lot of torque and weigh not much.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

Yeah but this is pretty mental too



That almost wood grained effect on it makes it look especially mad - in fact it looks like one mighty fine way to loose your front teeth!

How about getting a 4matic gearbox and making it three wheel drive?

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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!

This thing will corner well and without the leaning may be hard to stay seated on.

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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.