Hey All,

If you seen the post of my differential having "foam" inside the differential housing, I am begining to hear whining noise that sounds to me like a souped up american V-8 with a gear drive for a timing chain or one with supercharger.

Anycase, I found a donor 1984 300SD with 3.07 gears that I can get the differential out of it. I think this would fit in my 1983 300D but wanted to ask you guys for certain that it would. Would I just swap/install it and use my 300D's axles and spacer?

Thanks for your input.

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1983 123.133 California
- GreaseCar Veg System

I want to say the dif will not bolt up to the W123 subframe but the internals (the pumpkin as I know it) will transfer IIRC

It will work. You just need to change the axle shims.

Change it out to what? Do I use the original shim that I took off from the 300d?

__________________
1983 123.133 California
- GreaseCar Veg System

I believe so. I know that some people here have used 126 differentials on their 123. Hopefully one can chime in and say exactly what needs to be changed.

If interested, I have a 2:88 differential out of an 85 300D.

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81 Mercedes 300SD 289k.......SOLD
82 Mercedes 300CD 252k......slow ride

82 mercedes 300 SD...mi Unknown
83 Mercedes 300D ????ksniff..gone too
84 Mercedes 300D 148k........SOLD
85 Mercedes 300TD 386k and holding some one elses project

I havent noticed a whine on my 85.. or Maybe I'm just thinking its road noise.

Surf n Turf has his 240D with the 617 in it and the OG 240D rear end( but is putting in the one from the 300)..

Its fast off the line but the top end sucks

The only thing required is the correctly geared speedo.

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

So then all you need is a 2.88 rear diff and the speedo from and '85 also? No need to change the speedo gear in the tranny?

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

Nope. The gearing on all MBZ transmissions (well ones we generally deal with) is the same. The only thing that changes is the gearing on the rear diff and the gearing in the speedo itself.

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

si just need the speedo from an 85 300d ...does anyone know what other car had the speedo for a 2:88?

__________________
Wie lange wird Ihr Auto leben?

2.88 in a 123 was a 85 thing only. 126's do have 2.88 but I believe the have electronic speedos.

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

have you tried filling your diff with oil?

__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Yes flush and fill with Mobil1 synthetic, didn't do much with the noise..

I will be swapping new one out with my recently found 2.88.

__________________
1983 123.133 California
- GreaseCar Veg System