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#16
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Quote:
I haven't heard of any 4 Speed Automatics that utilize a 1:1 4th gear. Anyone have a chart showing the gear ratios for MB 4 Speed Automatics through the years ? |
#17
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Here' you go Katmandu!
Model Ratio 107 450SL,SLC 1:2.65 450SL,SLC 1:3.06 380SL,SLC 1:2.47 380SL,SLC,560SL 1:2.47 108 280S,SE,SEL 1:3.92 280S,SE,SEL 1:4.08 280SE,SEL 4.5 1:3.27 113 250SL,280SL 1:4.08 280SL 1:3.93 114/115 220D,240D 1:3.92 280,280C,300D 1:3.69 116 280S,SE 1:3.69 300SD 1:3.07 450SE,SEL 1:3.06 450SE,SEL 1:2.65 123 230,240D 1:3.69 280E 1:3.58 300D 1:3.46 300DT to 84 1:3.07 300DT 85 1:2.88 124 260E 1:3.27 300D (1987) 1:2.65 300E 1:3.07 126 300SD to 85 1:3.07 300SD 85 1:2.88 ABS 300SDL 1:2.88 ABS 300SE,SEL 1:3.46 380,500 1:2.47 380,500,560SEL 1:2.47 420SEL 1:2.47 201 190D 2.2 1:3.42 190E 84-86 1:3.23 190E 84-86 1:3.23 190E 87-88 1:3.27 190E 87-88 1:3.27 Last edited by Katmandu; 07-15-2008 at 06:07 AM. |
#18
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My '82 starts out in 1st from a dead stop. It also down shifts to first when the speed drops below 10 mph.
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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 |
#19
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My old BMW ran at about 4000RPM at 70mph, i know its high but i've fiddled with it and thats just what it ran at. BTW it was a 318i.
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1963 Ford F100 - Cummins Swap? 1985 Mercedes 300SD - 210K 1992 Ford Festiva - 92K 2001 Ninja 250 - 8K |
#20
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My reference for transmission ratios is Nitske's book. Sixto 87 300D |
#21
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OK
The only time you will have a 1:1 ratio in automatic transmission is if it has over drive. The carrier will be locked to the plantary gearset in thetranny. Mercedes transmission are geared similar to manual even though they are different in the aspect that the faster you go the smaller gear ratio you will have providing speed instead of torque.
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1986 300SDL, 211K,Dealership serviced its whole life 1991 190E 2.6(120k) 1983 300D(300k) 1977 300D(211k) |
#22
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I've lost track of the question but someone asked what the 4th gear ratio is and I repeated what I saw in Nitske's book
For the sake of discussion, I believe 1:1 describes the ratio between the transmission input and output shafts. It does not consider the effects of slip through the torque converter on engine rpm. It is a reference to the mechanical design of the transmission, just as static compression ratio is a reference to the mechanical design of the engine. I don't know how an acceptable compression test result range of 350-400 psi (or whatever it is) confirms or rejects that static compression ratio is 22:1 (or whatever it is). Sixto 87 300D |
#23
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Is this a typo? 1:1 ratio is "high" gear and not overdrive. Overdrive means that the output shaft spins faster than the input shaft.
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#24
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Yeah thats what I meant been a long day. 1:1 is when the input and outputs are spinning at the same speed. Overdrive is any gear ratio less than 1 henc 5 gear in a manual tranny
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1986 300SDL, 211K,Dealership serviced its whole life 1991 190E 2.6(120k) 1983 300D(300k) 1977 300D(211k) |
#25
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I'm curious as to the Auto transmission ratios. Especially, 4th gear. |
#26
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Tranny and rearend ratios
4th gear is 1:1 in the W201 automatics. That's a fact. The only "overdrive" transmissions available in W201 cars are the non-Getrag 5 speeds. The Getrag 5-speeds in the 16V cars use a 1:1 5th gear.
To be sure about the rearend, check the numbers stamped into the rearend housing (assuming the gears have not been changed internally). You can find these numbers stamped in one of the "ears" located at the lower left hand and lower right hand corners of the rearend housing. Then do the math to figure out the rpm's based on the rearend ratio and tire diameter. SteveM.
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'93 190E/D 2.5 Turbodiesel 5-speed (daily driver) '87 190D 2.5 Turbo rustbucket - parts car '84 Dodge Rampage diesel - Land Speed Record Holder '13 Ram 2500 Diesel '05 Toyota 4Runner |
#27
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Time for some tranny work..... 2nd gear starts are a myth, they should start in first.
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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 |
#28
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Quote:
__________________
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 |
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