Does anyone know where I can find info on what rear axle gear ratio came installed in my 84 300 CD turbo? Also, what exact year/models have a higher ratio rear differential that will be a direct bolt-in for my coupe.

I've seen references to the stock gears being 3.08, but also that there are rear differentials out there with 2.88 and even 2.47 gears.

Seems like maybe the 2.47 might be a little too extreme and kill my off-the-line acceleration. The 2.88 ratio sounds like a good compromise though.

Any specific years and models of MBs that have a 2.88 rear that will bolt in directly without any mods?

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1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock

1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown

1976-1983 240D 3.69
1976-1981 300D/CD= 3.46
1978-1980 300TD=3.46
1981-1984 300TD=3.07
1982-1984 300D/CD=3.07
1978-1984 300SD=3.07
1985 300D/CD/TD/SD=2.88

No W123 ever came with a ratio higher than 2.88

Your '84 has a 3.07 (also known as a 3.08).

All the '85's have the 2.88..........but only the '85.

there was a 85 300D just crushed at our local PNP with a 2:88

I thought about pulling, I thought too long .

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

Thanks for the details FI....

I guess I should have clarified that as I understand it there were some gasser rear ends with the 2.47 ratio that will fit.

What I'm most unclear on, is how hard are they to swap? Direct bolt-in or significant mods required?

__________________
1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock

1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown

What ever you use, you will need the corresponding speedometer.

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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.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Bolt on, the front diff mounts can be a PITA.

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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

What are the gear ratios that exist for the W210 series?

You'd think between the E300, E320, E400 that there would be some choices.

Are there?

Sorry, but your reply seems a bit cryptic - are you saying the gasser diffs are direct bolt in, but the front mount on ALL the MB diffs is a pain?

Any details on WHICH gasser diffs are a direct bolt in?

__________________
1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock

1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown