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  #1  
Old 12-14-2009, 12:02 PM
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Transmission shifts at redline

My friends 1984 300D has hard shifts. It will only get into 4th gear at about 75 when it is taching almost 4200 - 4400 rpm.

The bowen cable adjustments do nothing for this what are the other possibilities?

Thanks

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  #2  
Old 12-14-2009, 12:13 PM
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Stuck kickdown switch. Unplug it and see what happens.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #3  
Old 12-14-2009, 12:16 PM
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When my fuel filter start to get clogged this is what is happening, it take a long time in the near red to shift. Lack of fuel/ power I guess to shif fast enough.
How old it the fuel filter?
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E300TD year 2000. RUSTY SOLD
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but run well on WVO
Second Merc died due to corrosion ( NOT rust) How can mercedes get away with that for so long?
Third lasted a month then went away...
Fourth now... Corroded too...
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  #4  
Old 12-14-2009, 05:19 PM
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classic sign of (a) vacuum leak(s). Check the short piece of rubber on the left side of the trans at the modulator, and all short rubber pieces and nipples under the hood.
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2003 Buick Regal
1983 300D (228k, frau Auto)
1996 Suburban K2500 (192k, 6.5 turbo diesel/4WD towmaster 10,000)
www.engineeringworks.biz
1987 300SDL junker 170k
1982 300SD junker, 265k
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  #5  
Old 12-14-2009, 05:26 PM
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Vacuum doesn't control shift points on an 84 300d.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #6  
Old 12-14-2009, 11:44 PM
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Unplug the kickdown switch behind the accelerator pedal. If that doesn't help, then the kickdown solenoid is stuck in the tranny. For this, plug the switch back in and drive while pushing the switch in multiple times. This may unstick the solenoid.
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'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
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  #7  
Old 12-15-2009, 06:30 AM
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Just went through this. It was a stuck kickdown switch. Only I replaced my Bowden cable because I thought it was that. I should have posted on here first.
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  #8  
Old 12-23-2009, 09:33 AM
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It is the kick down switch.

Thanks Guys

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1985 300 TD GG done in by a red light runner
1984 300 CD Sold
2008 Titian
2000 Cadillac SLS
1966 FLH Sold
2003 Harley Ultra
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