[twenty3sky]

Hey y'all,
I noticed some fluid below my car the other day (not one hundred % sure it was from my car but denial is always lingering when issues occur) It was from the back of the car. Checked the trans fluid, which is fine. Car still seems to run okay except I notice it is shifting harder, shudders to a stop, and has a sound like loos change coming from the rear (only audible outside the car when running, even if its in park) Any ideas and are the two related. I guess my question is would my vaccum be affected by loosing differential fluid. Or has anyone had similar issues. Thanks in advance.

 

[dfwdiesel]

The way to check the rear end is get the large Hex socket, autozone has a set of three lar...

The way to check the rear end is get the large Hex socket, autozone has a set of three large Hex sockets for under $10 which will include the one you need.

Take the fill plug off first, because sometimes the fill socket will not come off after the rear end fluid has been changed.

Get two quarts of rear end fluid, wall world 85/90
is cheap and meets specs, even has a mercedes logo on the tin foil seal along with other logos. Will take a little under one quart, but get two quarts because it can be awkward to get the last need amount to fill it from the first quart.

Some people use Mobil 1 Synthetic, have what may be a fear, that the Mobil 1 would cause a leak, in a gasket I don't want to replace. Probobly won't but just thinking about is enough.

Even if there are no leaks or none from the differential, you will notice the difference from fresh rear end oil.
John Gregg
1983 300D Euro among other mbz

 

[twenty3sky]

Fluid Chex

JG,
Thanks for the info on changing/checking the diff fluid. Any idea if this would affect the vacuum throughout the car? It just seems too coincidental both things happened at the same time after 15k trouble free miles. Thanks again.
ric

 

[dfwdiesel]

There shouldn't be a relation. There is likely a vacuum leak in the many hoses. The best w...

There shouldn't be a relation. There is likely a vacuum leak in the many hoses. The best way to find it is with a "mityvac" A little more then $30 at the local autozone. Get the one with a gauge attached. Also get some golf tees for pulling off and plugging lines while presurizing them with the mityvac. It has a hand pump, and will also check pressures from the engines vacuum pump. The last one shut off problem I had was on duaghter's 85 190D. We found not one but two leaks. I tried without the mityvac (it was at a friends house some distance away. no success even though the two breaks in the hoses where right in front of my face. When the mityvac was returned we found them within an hour,very lucky. Leaks can be
in other places such as inside the doors or under the dash. Our two were under the hood.

The mityvac is also helpful for bleeding non ABS brakes and changing the brake fluid.

John Gregg

 

[twenty3sky]

Euro difference

Appreciate it John Gregg!
Well After purchasing the mityvac I've found or believe I've found both right doors to have bad servos, a bad line and the fuel shutoff servo to be bad. As you are the poster I most commonly see with a Euro(I think you have an 83 non Turbo), I think you may answer what I hope is the final question for awhile. Can I use standard 84 300TD Vac parts in my 84 300D Euro? All the sites I visit have nothing available for Euro models. I can order them through the dealer but is there really a difference. If so where can I get parts for this car???

Again thanks.

 

[dfwdiesel]

Appreciate it John Gregg!
Well After purchasing the mityvac I've found or believe I've fo...

Appreciate it John Gregg!
Well After purchasing the mityvac I've found or believe I've found both right doors to have bad servos, a bad line and the fuel shutoff servo to be bad. As you are the poster I most commonly see with a Euro(I think you have an 83 non Turbo), I think you may answer what I hope is the final question for awhile. Can I use standard 84 300TD Vac parts in my 84 300D Euro? All the sites I visit have nothing available for Euro models. I can order them through the dealer but is there really a difference. If so where can I get parts for this car???

Again thanks.


I have been lucky with vacuum issues on my 83 300D euro non turbo. A possible source would be the local pick and pull. Quite a few 123's are often there, parts really inexpensive too. You could do a comparison between the 123 salvage yard parts and yours. On some RR jobs I like to get my practice getting it from thier cars too!

Info can be hard to come by on any Euro. Good luck.

John Gregg