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#1
11-20-2008, 10:47 AM
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Dose you car roll back???
I relized today that my 1984 300SD dose not roll back on a hill when the gear is in drive, i owned several 300SD and 300D (turbo and non) and they all rolled back down hill while the gear is in drive, is this a problem or normal???
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN  1995 E320 SE 220k mi 1984 300SD 350k mi 
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#2
11-20-2008, 10:51 AM
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Mine does not roll back with the engine running and tranny in D. I read somewhere that these auto trannies have the second oil pump in the rear ofthe tranny to prevent rollback.
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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 Last edited by rrgrassi; 11-20-2008 at 11:11 AM.
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#3
11-20-2008, 11:04 AM
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I would guess it depends on the idle speed.
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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
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#4
11-20-2008, 11:24 AM
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Quote:
And the grade of the hill.........
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#5
11-20-2008, 12:45 PM
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Mine doesn't roll back on moderate hills, and it doesn't have the 2nd pump.
-Jason
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#6
11-20-2008, 03:54 PM
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the hill that it rolls back if its more than 65* Angle, my idle speed is around 650 rpm In drive strange that how my dad 300SDL rolls back around i Drive at idle...
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi
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#7
11-20-2008, 04:20 PM
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Quote:
 do you drive a unimog?
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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
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#8
11-20-2008, 04:57 PM
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I think he means 45* lololol.
I remember my W140 would never roll back...it had some sort of rollback lock thing when in D. Not sure about the diesel tho.
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Current cars: 2000 ML55 AMG, 174k miles 2003 C240 T-Modell, 202k miles 1995 S320, 207k Miles
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#9
11-20-2008, 04:58 PM
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my 722.112 doesn't roll back on a hill.
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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#10
11-20-2008, 04:59 PM
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If you can push and move your car by hand on a flat surface in neutral I would not worry about it. A semi seized caliper or several of them could also act as a hill holder. This test proves you do not have that issue.
Another way to prove it is the transmission I would imagine. The car will forward creep on a flat surface with your foot off the brakes and fuel pedal. Years ago that was a feature of at least one american car. When you depressed the clutch pedal far enough it activated the brakes I suppose. They did call the feature a hill holder.
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#11
11-20-2008, 05:22 PM
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Exiting my neighborhood slope seems to be high i guess i over estimated
 but it could be around 53* or <
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi
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#12
11-20-2008, 05:35 PM
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Quote:
The steepest hills that are normally accepted by the auto manufacturers are hills with a 32% grade. SF has a couple of these and certain vehicles can't make the hill due to insufficient torque to start. The 32% grade translates to 17°.............so, you might want to readjust your estimate.
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