Transmission
From Dieselbenz.info/Wiki
Transmission Related
Transmission Vacuum Valve Lever
Diesel Vacuum Dashpot for the Transmission
Automatic Transmission Shift Bushing
Manual transmission grinds going into 2nd gear
Changing Manual Transmission Fluid
http://www.mercedesdismantlers.com/722.3and722.416_transmission_adjustments.html
http://articles.mbz.org/transmission/adjust/
http://tech-meister.com/DieselBenz/TECH/Trans-ADJUSTMENT.html
http://www.europeantransmissions.com/rebuiltkits/merc.reb.kit.htm
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Here is my Transmission Problem:
It's always kind of slipped a tiny bit when going up through the gears, but this is my main problem now.
I can't seem to correlate it to speed, heat, or any vacuum related things (like it only happens when the doors are unlocked or something like that)
So:
"Sometimes" it will not up shift. So I will start driving and it may either slip out of the highest gear and go into a lower one, but more frequent that that, it will, while going from a stop, not up shift to a higher gear. To alleviate this, I slide it into Neutral, wait a few seconds, (and I am unsure if I am hearing things, or imagining things, sometimes I think I hear a vacuum hiss, like when you turn on or off the A/C, or the doors lock or unlock, but this may entirely be a part of my imagination) and then I will shift it back down to D, and if I do that, sometimes up to 3 or 4 times, or after I come to a stop and accelerate really slowly and nicely laying off the accelerator at the "right time" it will go back to normal.
So I see lots of "solutions" that the internet, and I will explain them here and listen for your feedback:
1. Transmission Vacuum Valve Lever kit (dieselgiant.com)
Claims: Replace those vacuum valve levers to help restore smooth shifting in your turbo diesel. These are high quality OEM type parts that fit perfect. Most owners don't even know the levers exist, hence never replace them. Since they are plastic, they will wear out over time. They are located on the top of the valve cover, under the black plastic box with vacuum lines running to it. The levers are sold as a pair. This kit can be used on all diesel engines in the following chassis models 123 that use the vacuum levers.
Cost $12.
"helps restore smooth shifting" sounds right, but so does this:
2. Diesel Vacuum Dashpot for the Transmission
mercedes diesel new parts
This is the restrictor required to meter the proper HG's of vacuum to your transmission. Connects to the tranny switching valve on the injection pump. If your is leaking or not there anymore the transmission will not shift properly.
Another good reason to replace this is proper transmission shift function. A leaking or mission dashpot will cause hard shifting or erratic shifting.
Cost $15. ($5 online)
Again, same promises, but it can't be that cheap :)
3. Transmission Modulator Valve
A poor shifting transmission can result from a defective and leaking transmission modulator valve. Depending on model your valve may be black, green or red.
If you experience rough or erratic shifts, or hear a "clunk" when coming to a stop, your modulator valve may be bad. They can leak vacuum or just not function properly. They don't last forever, so when in doubt, replace it.
Cost $50 ($46 elsewhere)
This seems more like it...
4. Automatic Transmission Shift Bushing
Does your car pop out of gear and make noise at the shift linkage? Does it wiggle around and not feel solid?
- 5. Transmission Vacuum Valve
Ebay Link
If this valve goes bad, you'll have all sorts of weird shifting problems with your transmission - such as shifting too early or too late, harsh or muddy shifts, or transmission "flaring".
$50 used, if one can obtain one, legally somehow.
$200 NEW
This is probably it, right? :)
So yeah, there are about 5 options, they all "claim" to do the same thing, I'm sure I'll try some of the cheaper things first, but I'm sure they all need to be replaced.
