The modulator is designed so that the shift time can be adjusted, if
yours has not been messed with it should not need adjusting. Pretty sure
if the modulator is broken it reverts to harsh, neck breaking shifts but
it's been a while since I looked up info on the 722.3/4 boxes.
From memory without the modulator, the shifts will be pretty much
instant and hammer like.
Yes I have heard of people adjusting the modulator and getting better
shifts but the problem is that they are masking another issue, such as
sticky pistons/hard seals in the valve, worn clutch discs, worn brake
bands, etc.
It is odd that a 722.3 (the heavier duty version of the 722.4 found
behind the 2.6 version of the M103 and smaller motors) should have
clutch issues @ such relatively low mileage, hence I am leaning towards
valve body issues.
You can get a kit that is designed to overcome a lot of issues people
have
http://www.ebay.com.au/itm/S68165D-Superior-Shift-Kit-722-3-722-4-Diesel-K722A-D-/130410987310
I do have an issue with people saying "adjust your modulator" by all
means test it to make sure it is working, they can go bad but don't go
messing with adjustments you don't fully understand the consequences of.
The 722.3 box is probably one of the best MB has made (mine has over
450k kmh on it and as far as I know has not been opened).
Another thing that is easy is to add some additives to the box to try
and rejuvenate the piston seals, given that it sat for a long time this
could be an issue.
Hendrik
who should think about changing the ATF soonish, which reminds me, was
there any evidence of nastiness in the pan when you changed the
oil/filter? Generally a box that is starting to wear out will have
evidence in the pan. When I was looking for a 722.4 for my Mums 190E, I
pulled the pan off a couple of boxes at the wreckers and the first one
was nasty and second the one looked good, so I bought the second one
On 14/10/13 11:10, rkmerce...@aol.com wrote:
No. I am not familiar with the procedure for adjustments.
Sent from my Verizon Wireless 4G LTE DROID
Gary Hurst <jabbahur...@gmail.com> wrote:
have you tried to adjust your modulator already?
On Sun, Oct 13, 2013 at 7:42 PM, Robert Koziak <rkmerce...@aol.com> wrote:
Feedback seems to lean toward a transmission vacuum module or vacuum leak
being a possible cause. Can you guys point me toward a part number, price
and instructions to change. t might make sense to start there if it's not
too expensive or difficult.
Bob
-----Original Message-----
From: Gary Hurst <jabbahur...@gmail.com>
To: Mercedes Discussion List <mercedes@okiebenz.com>
Sent: Sun, Oct 13, 2013 10:22 am
Subject: Re: [MBZ] 1990 MB 300E Transmission Problem etc.
if the high reving is between gears, it's very likely vacuum related.
transmission shops will generally just try to sell you a transmission and
probably ought to be avoided.
did you make captain yet?
On Sun, Oct 13, 2013 at 8:49 AM, Robert Koziak <rkmerce...@aol.com> wrote:
Hi all,
I recently started using my 1990 Mercedes Benz 300E w/89K. I
purchased it 7 years ago because it was in mint shape and was a good
deal.
The car had basically been in storage for the last 7 years. I used it
for
an average 100 miles per year bring it in and out of the garage a only
few
times a year. I changed the oil yearly anyway. It was in mint shape
when
I bought it.....the previous owner was very meticulous.
The car ran great for about 2 thousand miles but last week I noticed
the transmission is occasionally revving before shifting in the upper
gears. I changed the transmission filter and fluid but the issue still
exists. Any suggestions, I was going to take it to my local transmission
shop for an evaluation so I wanted any thoughts on the problem. Are
there
any simple adjustments on this transmission?
The car did have the head gasket changed by Mercedes along with a
conversion to R134 air conditioning. Other than that it had regular
maintenance.
Any other thoughts on what to look out for this model and year would
be greatly appreciated.
If it turns out that the automatic transmission needs replacing,
what
is the price range I should be looking to pay, I live in the suburbs of
New
York City where the cost of living is pretty high.
Bob
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