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W124 300TD Transmission Consistency
So I finally am curious about something that has been bothering me for sometime and the only way I can explain it best is like this.
When I am in drive whether I am flooring it (without pushing the button on the floor) or whether I have it at half throttle (if you will) my wagon shifts consistently @ 2,000 RPMs. I never thought it was a big deal as last summer (thanks to you guys) I found out the my transmission was shifting hard because of a faulty VCV and as soon as that was replaced I was so pleased with the shift that I haven't thought of it since. Now I am curious and I imagine that the car isn't suppose to shift this consistent, obviously every other car shifts depending on how much you depress the pedal (automatic obviously). Anyway does this sound like something someone has heard of before? If so let me know or should I do some Mitty Vac testing to figure this mystery out. On a side note the transmission shifts gear, never grinds and the transfer case seems very strong, however I am leaking transmission fluid and check it/top it off every few weeks. I also want to find out from where it is leaking (under load) and what can be done to fix that as I do not think I need a rebuilt trans this one seems fine. Thanks for reading I appreciate any incite you guys may have. Frank
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'87 300TD Estate (Panzer Wagon, Sold) '95 E320 Estate (Sabertooth, Sold) '94 E500 (Stark 1, For Sale) '04 VW GTI (Rhino, Sold) '12 VW GTI Autobahn (Shadow) |
#2
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It could be your throttle linkage is out of adjustment, so even though you think you are flooring it, you are actually only getting X% throttle. I went through this ordeal in the past. If it is, you might be in for a big surprise in power!
The other option might be the bowden cable, but if it were the case, different throttle positions would likely alter the shifting rpm. I just adjusted mine...also shifted around 2K, but would go higher if floored (without the button, too).
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Dan 2005 E320 CDI - 246k 1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k Past: 1987 300D - 264k |
#3
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The biggest increase in power I've ever felt in this car was removing the alda, and I can't imagine the performance getting any better it hauls pretty quickly right now. (ya never know though).
As for the bowden cable, that may be something I have to look into. Where is it located? (when I get home I am going to try and find my diagrams to see if it is on there).
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'87 300TD Estate (Panzer Wagon, Sold) '95 E320 Estate (Sabertooth, Sold) '94 E500 (Stark 1, For Sale) '04 VW GTI (Rhino, Sold) '12 VW GTI Autobahn (Shadow) |
#4
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I don't have a diagram, but it's below the throttle cable..it shoud have a type of rubber shroud covering the front of it. If you do a search for the bowden cable, there are a few pictures. Sorry that I can't be much more specific!
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Dan 2005 E320 CDI - 246k 1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k Past: 1987 300D - 264k |
#5
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Look just behind the IP and cruise-control, you'll see a cable coming up the firewall to an adjustment. I believe that shorter is higher-RPM shifts, it should however be slack with the pedal up/idle.
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Gone to the dark side - Jeff |
#6
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You have an 87 300TD with a transfer case???
The IP end of the bowden (I originally said throttle) cable is a PITA to get to with the sedan windshield washer in place. I don't know if the wagon is setup differently. There's a cable that comes in from the left of the engine. That's the accelerator cable. As 'mog says, you want the cable coming up from the tail end of the engine. Sixto 87 300D Last edited by sixto; 02-13-2009 at 10:59 PM. |
#7
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If I don't pull my hand out with a bruise on the back of it, I wasn't working hard enough Sixto!!
They did make a 300TD 4matic, just didn't send it to the US.
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Gone to the dark side - Jeff |
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I wish I had a 4matic, no I don't own one that was a slip on my part I meant that the power was being transferred to the rear wheels well. =)
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'87 300TD Estate (Panzer Wagon, Sold) '95 E320 Estate (Sabertooth, Sold) '94 E500 (Stark 1, For Sale) '04 VW GTI (Rhino, Sold) '12 VW GTI Autobahn (Shadow) |
#9
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On the 124, you'll probably need to remove the windshield washer tank so you can get a look at the cable and its connection. If the shifts all occur at 2000 rpm, the cable is non-functional at this point. It's probably broken and seized in one position. I wouldn't bother with any adjustment until you confirm proper operation of the cable from the throttle linkage to the transmission.
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#10
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Don't need to, I didn't, but it does make it easier. Simply lift the tank with one hand slightly above its normal resting point in the bracket and you should be able to reach your right hand around it adequately.
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Gone to the dark side - Jeff |
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I can manage to reach mine...but I have a different washer bottle in there!! Ha. I knew it was good for something (it didn't have a hookup for the headlight washers, before I got rid of them)
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Dan 2005 E320 CDI - 246k 1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k Past: 1987 300D - 264k |
#12
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Quote:
@Brian this may sound like a stupid question (sixtwo can confirm this, jk <3) but how do I check the cable for proper operation before I fiddle with the cable adjustment, as you mentioned above? Get back to me whenever you get a chance. BTW Check out this gem I found on eBay =X |
#13
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Quote:
Have them step on the go pedal while you observe the cable mount. The linkage should draw the cable out of the sheath. |
#14
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Ideally you have the transmission pan off to confirm the far end of the cable is moving the thrust lever
Sixto 87 300D |
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